Getting a shell on a device you cannot route to is one of the oldest problems in IoT development and operations. Raspberry Pi boards, industrial gateways, and embedded controllers regularly end up behind NAT routers, carrier-grade NAT, or cellular access points. In those environments, nothing on the public internet can open a direct connection to the device. You need a way for the device to reach out somewhere and then let you connect through that channel.
SocketXP solves this with a small agent that dials out to its cloud gateway. The agent keeps a persistent outbound connection, and you access your device through a browser terminal or through the agent itself. It works, and for many fleets it is a reliable piece of infrastructure. But if you read the SocketXP pricing table closely, you will notice an important limitation. The two cheapest paid plans, Lite at $20 per month and Core at $99 per month, list "SSH using third party tools", "SSH using public private key", and SCP/SFTP from your own tools as not included. On those plans, SSH means the browser terminal in the SocketXP portal, not your normal terminal workflow.
This guide explores what pushes people away from SocketXP and then looks at five alternatives that solve the same remote access problem in different ways: Pinggy, Tailscale, RemoteIoT, qbee.io, and Cloudflare Tunnel. Prices and limits come from each vendor's own pages, checked on October 25, 2026. Install and connect commands are quoted from each vendor's documentation. I did not run them against live accounts, so use them as starting points rather than scripts that have been verified on your hardware.
Why people look beyond SocketXP
SocketXP's agent opens an outbound TLS tunnel to its cloud gateway. You reach the device from the terminal in SocketXP's web portal, or by running the agent on your laptop in what SocketXP calls slave mode. The TCP endpoints are deliberately not public. The docs say they can be accessed only using the SocketXP agent with your auth token, or through the XTERM terminal. That is a sound design from a security perspective, because the device never accepts an inbound connection. The friction appears in the pricing plans and in the network plumbing around the agent.
The pricing table is the first wall
SocketXP groups its plans into Small Business and Enterprise. Both groups include 40 or 100 devices depending on the tier. The Small Business plans are Lite at $20 per month, Eco at $39, and Pro at $79. The Enterprise plans are Core at $99, Basic at $299, Standard at $499, and Premium at $799.
The problem is what the entry plans leave out. Lite and Core do not include SSH using third party tools, key-based SSH, slave mode, or SCP and SFTP from your own tools. For those features, you need to step up to Eco or higher. That means if your daily workflow is built around OpenSSH, scp, rsync, or any automation that invokes the ssh command, the cheapest workable plan is Eco at $39 per month, not Lite at $20. On Lite and Core, the only SSH access is the browser terminal inside the SocketXP portal.
Every plan also caps data per device. Depending on the tier, the cap is somewhere between 100 MB and 500 MB. For lightweight configuration changes that is plenty. For log inspection, package downloads, or image transfers, the cap can become a practical bottleneck. There is also no permanent free tier. SocketXP only offers a 30-day trial for two devices. If you want to evaluate the product without a credit card and without a time limit, there is no way to do that on the free side of the pricing page.
The network plumbing deserves attention
Since agent version 2.0.0, SocketXP connects to TCP port 9443. Its troubleshooting guide asks you to allow outbound traffic on 9443 and 443. Most corporate networks allow 443, but 9443 is not as universally open. If your device sits on a guest Wi-Fi network, a hotel connection, or a restricted cellular APN, you may need to request a firewall change for that additional port.
The gateway runs in two regions: us-central in Iowa and eu in Frankfurt. An auth token from one region does not work in the other. If you have devices in both Europe and North America, you need to keep the regions straight and provision accordingly. This is not a deal-breaker, but it is extra operational overhead that you do not think about until the first token mismatch.
SocketXP alternatives at a glance
Before diving into each alternative, here is a compact comparison table. It covers how each tool reaches the device, whether a free tier exists, the paid entry point, and what your laptop needs to connect.
| Tool | How it reaches the device | Free tier | Paid entry point | Your laptop needs |
|---|---|---|---|---|
| SocketXP | Agent, outbound TLS on 9443 | 30-day trial, 2 devices | $20/month for 40 devices | Browser, or the SocketXP agent |
| Pinggy | SSH reverse tunnel on 443 | Yes, 60-minute tunnels | $2.50 per seat per month (annual) | Any SSH client |
| Tailscale | WireGuard mesh, relay fallback | Up to 6 users, non-commercial | $8 per user per month | Tailscale client |
| RemoteIoT | Java agent, public proxy port | Non-commercial plan | $0.20 per device | Any SSH client |
| qbee.io | Agent, outbound HTTPS on 443 | 5 devices | €149/month for 50 devices | qbee-cli or qbee-connect |
| Cloudflare Tunnel | cloudflared, outbound to Cloudflare | Tunnels on all plans | Access $7 per user per month (annual) | cloudflared and a Cloudflare domain |
Only the first model publishes a port anyone can reach. The rest either use a relay with authentication or a client-based mesh. The choice between them often comes down to whether you want a simple host and port or a more private network model.
The three access models that matter
The alternatives in this guide fall into three architectural families. Understanding these families makes the choice easier.
The first family is the public reverse tunnel. The device opens an outbound TCP connection to a relay server, and the relay server assigns a public address. Anyone who can reach that address can attempt to connect. Pinggy and RemoteIoT use this model. The relay server is the only thing that needs a public IP. The device itself remains behind NAT, but its port is exposed on the relay's IP. This model is simple and works with any SSH client, but it requires additional hardening because the world can see the port.
The second family is the peer-to-peer mesh network. Tailscale is the representative here. The device and your laptop both install a client that manages WireGuard keys and coordinates through a coordination server. The coordination server helps establish direct connections when possible, and falls back to encrypted relays when direct connections are impossible. No public port is ever created. The drawback is that every participant must run the Tailscale client and be authenticated to the tailnet.
The third family is the cloud relay with a client-side gateway. SocketXP, qbee.io, and Cloudflare Tunnel all fit loosely in this category. The device connects out to a cloud service. To reach the device, you either use the cloud's web portal or run a matching client component on your laptop that connects to the cloud and exposes the device locally. The device is never publicly addressable. Authentication is handled by the cloud service, which can be a good thing because it centralizes access control.
Each model has a different security profile. Public reverse tunnels create a larger attack surface but are the easiest to use with automation. Mesh networks have no exposed surface but require software on every client. Cloud relays are clean but often require a proprietary client for interactive use. The choice is not about which is objectively better. It is about which tradeoffs fit your team and your network.
The 5 best SocketXP alternatives
1. Pinggy: an SSH reverse tunnel with nothing to install
Pinggy takes a different approach from SocketXP. Instead of a proprietary agent and a browser terminal, Pinggy forwards a public address to a port on your device over an ordinary SSH connection. On a Raspberry Pi or a similar Linux device, there is nothing to install. The device itself dials out to Pinggy on port 443, and Pinggy prints a public TCP address and port that you can use from any SSH client.
The core command looks like this:
ssh -p 443 -R0:localhost:22 tcp@free.pinggy.io
After you run that command on the device, Pinggy outputs something like tcp://free.pinggy.io:12345. Then, from your laptop, you connect normally:
ssh -p <port> <user>@<host>
Replace <host> with the host part of the address Pinggy printed, and <port> with the port. This is a normal SSH session. Your own keys, scp, and port forwarding all work because the connection is created by OpenSSH on the device and terminated by OpenSSH on your laptop. There is no middle browser terminal, no web-based file transfer, and no requirement that the device run a proprietary agent.
For a device that has to stay reachable, Pinggy provides a CLI. The CLI can be installed through npm with npm install -g pinggy if your device has Node.js 18 or newer, or through a prebuilt linux-arm64 binary. The CLI reconnects automatically after network changes or reboot. Pinggy's Linux startup guide also shows how to set up a systemd unit so the tunnel starts at boot. A minimal unit might look like this:
[Unit]
Description=Pinggy tunnel for remote SSH access
After=network-online.target
Wants=network-online.target
[Service]
ExecStart=/usr/local/bin/pinggy -p 443 -R 0:localhost:22 tcp@free.pinggy.io
Restart=always
RestartSec=10
[Install]
WantedBy=multi-user.target
If you use the Pro plan, the CLI supports remote management. You can link the device to the Pinggy dashboard with a command like:
pinggy --remote-management <API_KEY>
Once linked, you can start, change, and stop tunnels remotely from the dashboard without opening a shell on the device. That is useful for fleets where you do not want to give every engineer direct access to the machine.
Free tunnels on Pinggy last 60 minutes and rotate to a new address each time. That is fine for a quick debugging session, but not for anything permanent. Pro costs $2.50 per seat per month billed annually, or $3.00 monthly. Each seat includes one persistent TCP or UDP port. If you want 40 devices with fixed SSH addresses, you need 40 seats. Above 20 seats, Pinggy asks you to contact them for volume pricing.
The tradeoff is the reverse of SocketXP. The port is public, so anyone who scans the address space can find it and attempt to log in. You absolutely should use key-only SSH, and if you connect from a fixed address, add Pinggy's IP whitelist. The whitelist is passed as part of the tunnel command, for example w:<your-ip> as a query parameter. Behind that, you are responsible for your own hardening. Pinggy does not provide OTA updates or fleet metrics, so if those are part of your IoT management strategy, you will need to pair it with another tool.
2. Tailscale: a WireGuard mesh instead of a public port
Tailscale is not a tunnel that gives you a public port. It puts your device and your laptop on one private WireGuard network, called a tailnet. Each device gets a stable tailnet IP address. Connections start relayed through Tailscale DERP servers, then attempt to upgrade to a direct peer-to-peer link when NAT allows. Behind hard NAT or restrictive firewalls, the connection stays relayed. Either way, you SSH to the device's tailnet address with your own keys, and nothing is published to the public internet.
Installing Tailscale on a Raspberry Pi or another Linux device is straightforward:
curl -fsSL https://tailscale.com/install.sh | sh
sudo tailscale up
The tailscale up command prints a URL. Open that URL in a browser, authenticate, and the device joins your tailnet. Then from your laptop, which also runs Tailscale, you can connect to the device at its tailnet address:
ssh <user>@<tailnet-address>
Tailscale can also handle SSH authentication itself. The command sudo tailscale set --ssh enables that mode, where Tailscale uses tailnet identities for SSH authentication. That feature works only on port 22, and only on Linux hosts and macOS hosts running the open-source tailscaled. It is a nice convenience, but most users will simply use their existing SSH keys.
The Personal plan is free for non-commercial use. It includes up to 6 users and 50 tagged resources. Tailscale asks you to tag servers and other shared infrastructure so they are owned by a tag rather than a user. Those tagged resources count against the 50 resource limit. Beyond 50, they cost $1 each per month. The pricing page says those limits are not enforced yet, which means you may not see an invoice for a while, but you should plan for them anyway. Paid tiers are Standard at $8 per user per month and Premium at $18. The client is open source under the BSD-3-Clause license.
The catch with Tailscale is that every machine that needs to connect must have the Tailscale client installed and signed in to your tailnet. You cannot hand a contractor a host and port. They need to join your tailnet or you need to share a node with them through Tailscale's sharing feature. There is no OTA update mechanism and no device inventory beyond the tailnet list. If your goal is simply SSH, that is fine. If your goal is fleet management, you will need something else.
3. RemoteIoT: the closest like-for-like swap
RemoteIoT works the most like SocketXP in terms of user experience. An agent on the device connects out to RemoteIoT's cloud, which runs on AWS IoT. A dashboard lists your devices. When you want access, you click Connect Port and the dashboard gives you a proxy host and port, such as proxy8.remoteiot.com on port 10008. Any SSH or VNC client can connect to that host and port.
The installer is one line:
curl -s -L 'https://remoteiot.com/install/install.sh' | sudo bash -s 'your_setup_key' 'Device name' 'Note' 'Group'
The agent runs on Java. The installer accepts Java 8 or newer if one is installed. If Java is missing, it tries apt-get install openjdk-11-jre-headless, and if that fails, it downloads a Java 8 JDK from RemoteIoT's server. One detail worth noting on a Raspberry Pi: skip the openjdk-8-jre-headless line in RemoteIoT's help page. Debian 12 and 13, which are the bases of Raspberry Pi OS Bookworm and Trixie, do not package Java 8. Stick with Java 11 or a manually installed newer version.
RemoteIoT's free plan is for non-commercial use. The homepage advertises a no-card signup for up to 5 devices. Business Secure Access costs $0.20 per device from 6 devices, with 100 MB of data per device. The pricing page does not state a billing period, so confirm that with the vendor. Enterprise Secure Access is $1.00 per device from 5 devices and adds 1 GB per device, permanent tunnels, IP-based access limits, and a web console.
Read the help page before you commit a fleet. Below the Enterprise tier, a tunnel lasts 2 to 8 hours before its proxy port is removed. Also, only one port can be open at a time, so SSH and VNC cannot be open together with a single click. The proxy port is public, and IP restrictions are an Enterprise feature. A headless JRE on a small Pi image is also a real cost, both in storage and RAM. If your devices are tiny, RemoteIoT may not be the lightest option.
4. qbee.io: remote access plus OTA, like SocketXP Pro
qbee.io is closest to SocketXP's full scope. The same agent gives you remote access, OTA updates, configuration management, and metrics. The agent keeps an outbound HTTPS connection on TCP 443 to qbee's relay servers, so there is no 9443 firewall rule to request. That single detail can make qbee.io much easier to deploy on locked-down networks.
The installer is a one-liner:
wget -qO - https://setup.qbee.io | sudo bash -s -- --bootstrap-key <bootstrap-key>
After the device is connected, you can use the command-line client on your laptop. Log in once:
qbee-cli login
Then create a tunnel to the device:
qbee-cli connect -d <qbee-device-id> -t 2222:localhost:22
And finally connect with SSH:
ssh -l <ssh-login> -p 2222 localhost
This is a straightforward flow that feels similar to SocketXP's slave mode, but with a CLI that fits into scripts and automation.
qbee.io's free plan covers 5 devices and includes OTA updates, remote access, CVE analytics, and metrics. That is unusually generous for a tool with this scope. The next tier up, Startup, is €149 per month for 50 devices. Scaleup is €490 per month for 250 devices, with extra devices priced down to €0.52. Enterprise is custom, with per-device pricing as low as €0.30. The agent and qbee-cli are open source under the Apache-2.0 license.
The step from 5 free devices to €149 a month is steep for a small fleet. If you have 10 devices, the free tier is too small and the first paid tier may be overkill. Billing is in euros, so if you are outside the eurozone, you need to account for currency conversion and possible fees. Also, web console sessions time out after 5 minutes of inactivity. For short interactive bursts that is acceptable, but if you leave a session open while reading logs, you will need to log in again.
qbee.io is the best choice if your reason for using SocketXP was not just remote access but the broader device management story. If you only need a shell, you may find the OTA features unnecessary. If you need them, qbee.io is the only alternative in this list that provides them in the same package.
5. Cloudflare Tunnel: SSH behind Cloudflare Access
Cloudflare Tunnel takes a completely different networking approach. You run cloudflared on the device, which holds outbound-only connections to Cloudflare, four connections to two data centers. You publish SSH as a hostname on your domain, routed to localhost:22, and Cloudflare Access decides who may connect. On your laptop, an SSH config entry points at that hostname through cloudflared.
The relevant SSH config fragment looks like this:
Host ssh.example.com
ProxyCommand /usr/local/bin/cloudflared access ssh --hostname %h
Then you connect with:
ssh <username>@ssh.example.com
The first time you connect, Cloudflare Access opens a browser login. After authentication, your SSH session starts. This is a nice security model because the device does not expose a port, and the hostname is protected by Cloudflare's identity layer.
Tunnels are available on all Cloudflare plans. Cloudflare Access has a free plan that is designed for teams under 50 users, and pay-as-you-go pricing costs $7 per user per month, paid annually. cloudflared is open source under the Apache-2.0 license.
This route requires an active zone on Cloudflare and cloudflared on the client as well as the device. The connector uses outbound port 7844 over both TCP and UDP. Some strict networks block that port, so you need to verify it is open. An account is limited to 1,000 tunnels, which caps a one-tunnel-per-device fleet. If you have more than 1,000 devices, you will need a different design. Cloudflare Tunnel also provides no device inventory or OTA update mechanism. It is strictly a network path, not a management platform.
Even with those limitations, Cloudflare Tunnel is compelling for organizations already invested in Cloudflare Zero Trust. You get SSO integration, access policies, and audit logs without adding another vendor. If your team is not on Cloudflare, the setup overhead may not be worth it.
How to choose
If what you miss on SocketXP is plain SSH with your own keys, Pinggy and Tailscale are the shortest paths. Pinggy is the choice when you want a simple host and port that any SSH client can use, including the one built into your terminal. Tailscale is the choice when you would rather publish nothing and you are willing to install a client on every laptop that needs access.
If you want the same shape as SocketXP for less money, RemoteIoT is the nearest match. The dashboard, the agent, and the proxy port model all feel familiar. Just read the plan constraints carefully, especially the tunnel lifetime and single-port limitation below Enterprise.
If OTA updates and fleet configuration are why you bought SocketXP, qbee.io is the one to trial. Its free tier for 5 devices is generous, and the agent is open source. The jump to a paid plan is large, but for a real fleet it may still be cheaper than SocketXP's Pro tier.
If your company already runs Cloudflare Zero Trust, Cloudflare Tunnel fits what you have. You get access control from Cloudflare, and the tunnel itself is free. The main cost is operational complexity and the need for cloudflared on every client.
Cost comparison for a 10 device fleet
Let's make the pricing concrete for a common case: 10 devices, two engineers who need access, a non-commercial or small business scenario. Exact pricing changes over time, but based on October 2026 numbers.
SocketXP Lite for 40 devices is $20 per month, but it does not include third-party SSH or key auth. To get those features you need Eco at $39 per month. That supports 40 devices, so for 10 devices you are paying the same as for 40. SocketXP's per-seat cost is not a per-device cost. If you only have 10 devices, you still pay the plan price.
Pinggy Pro seats are $2.50 per engineer per month on annual billing. Two engineers are $5 per month, and each seat includes one persistent port. If each device needs a fixed SSH port, you need one seat for each device plus one seat for each engineer? Actually Pinggy's model gives one port per seat. To reach 10 devices with fixed ports, you need 10 seats, which at $2.50 each is $25 per month. You can share those ports among engineers because the port is just a public endpoint. So the cost scales with number of devices, not users.
Tailscale Personal is free for up to 6 users, so two engineers and 10 devices fit comfortably. If you need commercial support or more users, Standard is $8 per user per month, which would be $16 per month for two users. Tagged resources beyond 50 are an extra $1 each per month, but 10 devices are well below that.
RemoteIoT Business Secure Access is $0.20 per device from 6 devices, so 10 devices would be $2 per month, plus the free plan dashboard. That is the cheapest paid option in this list. But remember the data cap and tunnel lifetime limitations below Enterprise. Enterprise is $1.00 per device, so $10 per month, and includes permanent tunnels and IP restrictions.
qbee.io has no small paid tier between 5 free devices and €149 per month. At 10 devices you would need Startup, so €149 per month. That is a large jump. For 50+ devices, Startup becomes more interesting.
Cloudflare Tunnel itself is free. Cloudflare Access is $7 per user per month with pay-as-you-go, so two users would be $14 per month if paid annually. If you are under 50 users, the free Access plan may cover you, so the cost could be zero.
The cheapest approach for a 10 device hobby fleet is Tailscale free or RemoteIoT Business. The cheapest for a small business that wants production SSH is RemoteIoT Business if the limitations do not bite. Pinggy is reasonable if you only need a few persistent ports. qbee.io is not cost effective below 50 devices.
Migration and rollout strategy
Moving from SocketXP to any of these tools does not have to happen overnight. A safe migration starts with one device, side by side with SocketXP. Install the new agent or tunnel client, confirm you can SSH through it from your usual client, and then let it run for a few days. After the new access path is stable, disable or remove SocketXP on that device and repeat the process across the fleet.
When you plan the rollout, think about version control for your device configuration. If you use Ansible, Puppet, or a similar tool, add the new tunnel as a managed role. That way you can roll it out to 100 devices with the same script that already updates your system packages. Keep the SocketXP agent installed but disabled during the transition. You can use systemd to stop the old agent and start the new tunnel, then clean up once you have verified that the replacement works.
Monitoring is important. If a tunnel drops silently, you may not know until someone tries to log in. Add a heartbeat check to your monitoring dashboard. For example, a cron job on the device can check that the tunnel process is alive. A more robust approach is to have the tunnel client write a status file that your monitoring agent collects. Pinggy and qbee.io both provide dashboards, but you should still verify from the outside that the port or tailnet address is reachable.
Automation and configuration management
Remote access tools work best when they are part of your configuration management system. Instead of manually SSHing into each device to start a tunnel, define the tunnel as a managed service. If you use Ansible, write a role that installs the right binary, creates the systemd unit, and sets the environment variables. The role can be applied to every device in your fleet with a single playbook.
For Pinggy, the role would install the CLI, write the systemd unit file, and enable the service. For Tailscale, the role would install the package, run tailscale up, and capture the authentication URL for the first run. For RemoteIoT, the role would install Java, run the installer script, and verify the agent process. For qbee.io, the role would run the bootstrap command and then check the connection status. For Cloudflare Tunnel, the role would install cloudflared, configure the tunnel service, and add the SSH hostname to the internal DNS.
The challenge is handling authentication. Some tools need a device-specific token or key. For Pinggy, each device may need its own API key if you use remote management. For qbee.io, each device uses its own bootstrap key. For Tailscale, each device needs to be authenticated to the tailnet at least once. You can generate the tokens in your configuration management tool and inject them as environment variables. Do not commit device tokens to a public repository. Use a secrets manager such as HashiCorp Vault or git-secret.
When you automate the rollout, think about idempotency. The playbook should be safe to run multiple times. For example, the systemd unit file should be updated only when the content changes, and the service should not restart needlessly. A well designed playbook can turn a fleet migration from a week of manual work into a few minutes of orchestration.
Performance and latency
A reverse tunnel or a relay adds latency between your laptop and the device. The extra latency depends on the distance between your laptop and the relay, and the distance between the relay and the device. If both endpoints are close to the relay, the overhead can be as low as 5 to 10 milliseconds. If your laptop is in New York and the relay is in Frankfurt, the extra round trip can be 80 milliseconds or more.
Tailscale's direct connection mode is intended to reduce that overhead. When two devices can establish a peer-to-peer WireGuard tunnel, traffic does not pass through Tailscale's DERP servers. The direct path can be faster than a relay because it uses the shortest route your ISPs offer. However, if NAT traversal fails and the connection stays on a DERP relay, the latency can be higher than a normal reverse tunnel. In practice, direct mode works most of the time, but you should not assume it always will.
The Cloudflare Tunnel architecture uses four outbound connections to two data centers. That is enough for redundancy, but it also means that if your nearest Cloudflare data center is far away, you may see extra latency. Cloudflare has many data centers, so this is rarely a problem.
For command-line SSH, a few hundred milliseconds of latency is not noticeable. For interactive editing or large file transfers, it can be annoying. If you plan to use remote desktop or an IDE over SSH, check the latency before you standardize on a tool. You may want to test with ping through the tunnel and adjust your SSH settings, such as enabling compression, to improve performance.
Throughput is another matter. Some plans cap data per device per month. RemoteIoT caps at 100 MB per device on Business, which is enough for configuration but not for video or large logs. SocketXP's caps are similar. If you expect to move gigabytes of data, you need a plan that includes more bandwidth or a tool like Tailscale where after the initial connection there is no data cap in the same sense.
Keepalive traffic itself uses a small amount of data. Pinggy's free plan and other low-cost tiers can go through their allowance faster if you send SSH keepalives every 30 seconds. That is around 400 bytes per keepalive per direction, which over a month is still small, but it adds up across many devices. Use a reasonable keepalive interval and disable it where you do not need it.
Practical workflow examples
Once you have tunnel access, you can use standard SSH commands. With Pinggy, you might copy a log file like this:
scp -P <port> <user>@<host>:/var/log/syslog /tmp/device-syslog
With Tailscale, the command is the same except the target is the tailnet address:
scp -P 22 <user>@<tailnet-address>:/var/log/syslog /tmp/device-syslog
For rsync through a reverse tunnel, you can use the -e option to steer it through the right port:
rsync -az -e "ssh -p <port>" <user>@<host>:/var/log/ /tmp/device-logs/
For qbee.io, you create a local port with qbee-cli connect, then run your normal command against localhost:
qbee-cli connect -d <qbee-device-id> -t 2222:localhost:22
rsync -av -e "ssh -p 2222" <user>@localhost:/var/log/ /tmp/device-logs/
For Cloudflare Tunnel, the SSH config handles the ProxyCommand, so you can use any standard SSH client without extra flags. Just use the hostname you configured:
ssh <username>@ssh.example.com 'tail -f /var/log/syslog'
One thing to watch for is agent forwarding. If you need to run sudo on the remote device and want to authenticate with your own SSH key, you may need to enable agent forwarding. The command-line flag is -A. Use it only when necessary, because agent forwarding creates a security risk if the remote device is compromised.
Scaling to hundreds of devices
Every tool has operational limits. SocketXP's plans go up to 100 devices in the Enterprise tiers, and you can buy multiple accounts if you need more. Pinggy's public port model scales to many devices as long as you have enough seats. The dashboard becomes useful at scale. qbee.io is designed for fleets with OTA and configuration management, so it can handle thousands of devices. Tailscale's free tier is capped at 50 tagged resources, but paid plans scale beyond that. Cloudflare Tunnel has a hard limit of 1,000 tunnels per account.
When you scale, the biggest issue is not the tunnel itself but the inventory. You need a way to know which device is which, what firmware it runs, and what port or hostname maps to it. A spreadsheet works for 5 devices, but for 50 or 500 you need a device inventory. If you use qbee.io, the inventory is built in. With the other tools, you should build a lightweight inventory in Git or a database. Include the device name, its tunnel endpoint, the SSH user, and the hardware revision.
Authentication also becomes more critical at scale. If you use public reverse tunnels and every device has the same SSH key, one bad flash means an attacker can access every device. Use unique keys per device and store them in a secrets manager. If you use Tailscale, each device has its own identity by default. If you use Cloudflare Access, you can tie access to email or group policy. Those identity layers are easier to manage at scale than raw SSH keys.
A deeper look at security
The remote access tool is only one layer of your security. The SSH server on the device is another. The tool may expose a port, but the security of that port depends on the SSH daemon. If password authentication is enabled, an attacker who discovers the port can attempt to brute-force the password. That is why key-only authentication is essential when using Pinggy or RemoteIoT.
Public reverse tunnels can also be a target for port scanning. The relay server assigns a port, but that port is on a range that can be scanned. If the vendor uses predictable port numbers, an attacker may find the port faster. Pinggy uses random high ports, but you should not rely on obscurity. IP whitelisting is the practical answer. If you know you will always SSH from the office, whitelist the office IP. If you connect from a dynamic IP, use a VPN or a tool that does not rely on a public port.
Tailscale's mesh model reduces this risk because there is no public port. But the security of the mesh depends on the strength of the WireGuard keys and the Tailscale coordination server. If an attacker compromises your Tailscale account, they can join their device to your tailnet and access everything. Use two-factor authentication on your Tailscale account and enforce short-lived session keys if your team links a user identity provider.
Cloudflare Tunnel uses Cloudflare Access, which can require SSO, two-factor authentication, and device posture checks. That is a significant improvement over a raw SSH key. The tradeoff is that cloudflared needs to be installed on the device and the laptop, and you need to trust Cloudflare's edge. If that is acceptable, it can be the strongest access control in this list.
qbee.io relies on the agent's outbound connection and the CLI login on your laptop. Since the connection is initiated by the device, there is no inbound port. The CLI uses your qbee account credentials, so you should protect that account with strong authentication. The qbee agent is open source, which means the security claims can be audited.
Finally, regardless of the tool, keep the device's operating system updated. A tunnel cannot protect you from a vulnerable service running on the device. If the device exposes other ports on a local network, an attacker who reaches the device through a tunnel may be able to pivot to those services. Use firewall rules on the device to restrict access to only the ports you need.
Integrating with CI/CD pipelines
Remote access tools can also help you deploy software to devices. For example, you can use a tunnel to fetch new binaries or run setup scripts. In a CI/CD pipeline, you need a way to run commands on a device that is behind NAT. The tool you choose must support non-interactive authentication.
Pinggy requires a persistent tunnel. If the tunnel is not running, the pipeline cannot connect. You can make the pipeline wait for a health check on the device before starting deployment. Tailscale is a better fit for CI/CD because the runner can be part of the tailnet. The pipeline can use a service account with Tailscale SSH support to connect. qbee.io has OTA, so you do not need SSH at all for updates; you push the addressable bundle through the qbee console or API. Cloudflare Tunnel can work with SSH keys and a service account, but the browser Access flow is not ideal. You may need to generate an API token for cloudflared access.
If you want to use Pinggy in a pipeline, create a dedicated SSH key for the CI runner. Add the public key to the device's authorized_keys. Make sure the tunnel is stable and the port does not change. You can use a fixed Pro port, so the pipeline can store the host and port as variables. Then run a command like:
ssh -i /path/to/ci_key -p <port> <user>@<host> 'sudo systemctl restart my-service'
If the pipeline runs in an ephemeral container, you need to ensure the SSH client is installed. Use an image that includes openssh-client. If you are using Cloudflare Tunnel in a container, install cloudflared and configure the SSH proxy before running the command.
Troubleshooting common issues
The most common problem with any SSH tunnel is that the connection drops after a few minutes of inactivity. Many routers and cellular carriers close idle TCP connections. The fix is to enable keepalives. With OpenSSH, add ServerAliveInterval 30 to your SSH client config. On the device side, you can set ClientAliveInterval 30 in /etc/ssh/sshd_config.
If you cannot reach the device, check whether the tunnel process is still running. On PID 1 systems, systemctl status will show the unit status. For Pinggy, make sure port 443 outbound is allowed. For Tailscale, verify that the device has a tailnet IP and that the laptop can ping it. For RemoteIoT, check the Java version and the agent log. For qbee.io, ensure the bootstrap key is correct and the agent is connected to a relay. For Cloudflare Tunnel, confirm that cloudflared is running and that the SSH configuration on the client is correct.
Port conflicts are another source of trouble. If you tunnel port 22 to a local port on your laptop, make sure that local port is not already in use. qbee-cli examples use 2222, which is a common choice, but on a busy developer machine 2222 may be taken. Change the local port to something else, for example 22222.
Firewall rules on the laptop can also block the tunneled connection. On Linux, check ss -tlnp to see if the local port is listening. On macOS, check your firewall settings. On Windows, make sure the local port is allowed. If you are using Cloudflare Tunnel, the ProxyCommand path to cloudflared must be correct. Use an absolute path if you installed it manually.
Finally, if you are migrating a large fleet, verify that your time synchronization is working. TLS certificates and WireGuard handshakes both rely on accurate clocks. A device with a dead CMOS battery and no NTP access will have authentication failures that are hard to trace.
Frequently asked questions
Does any of these tools have a free tier that is good enough for production?
Pinggy has a free tier, but tunnels are limited to 60 minutes and addresses rotate. That is not production-ready. Tailscale's free Personal plan is fine for a homelab or small team, but it is non-commercial. RemoteIoT's free plan is also non-commercial. qbee.io's free plan includes 5 devices and is usable for small production fleets, but the limit may be too small. Cloudflare Tunnel is free for the tunnel itself, plus Cloudflare Access has a free plan for under 50 users.
Which alternative supports SFTP from my own tools?
Pinggy, Tailscale, RemoteIoT, and qbee.io all support SFTP as long as you have SSH access through the tunnel. Cloudflare Tunnel also supports SFTP if you configure it correctly, but the browser-based authentication can make some SFTP clients unhappy. You may need to run cloudflared access as a wrapper or use a client that supports a ProxyCommand.
Do I need to install something on my laptop for every tool?
Pinggy and RemoteIoT are agentless on the laptop; any SSH client can connect to the public address. Tailscale requires a client on the laptop. qbee.io requires qbee-cli. Cloudflare Tunnel requires cloudflared on the laptop. If you want zero-install on the laptop, Pinggy or RemoteIoT are the easiest.
Which tool is best for a Raspberry Pi with limited storage?
Pinggy is the lightest because it uses the built-in SSH client. Tailscale is also small. RemoteIoT needs a Java runtime, which can be several hundred megabytes. qbee.io and Cloudflare Tunnel have their own binaries but are still reasonably small. The Java requirement is the biggest footprint on a small SD card.
Can I run two tunnels at the same time during migration?
Yes. You can run the SocketXP agent and a new tunnel client side by side on the same device. They listen on different ports locally and create independent outbound connections. Just be careful not to bind two clients to the same local port. After the new path works, stop the SocketXP agent to reduce the attack surface.
Other tools worth mentioning
The five alternatives above are the most direct replacements for SocketXP in terms of remote SSH. The broader IoT device management space includes other platforms that bundle remote access with infrastructure. balenaCloud is a container-based platform that can run on Raspberry Pi boards and provides device management, OTA updates, and a dashboard. AWS IoT offers a wider device cloud with rules engines and integration into other AWS services. These tools are not exact SocketXP alternatives because they require you to adopt their application model, but if you are rethinking your IoT workflow, they are worth evaluating.
Conclusion
Leaving SocketXP is mostly a choice about where the access point lives. Pinggy and RemoteIoT publish a port that any SSH client can use, so key-only SSH and IP limits do the protecting. SocketXP, qbee.io, and Cloudflare Tunnel keep that port private behind their own client, and Tailscale skips the relay entirely when NAT allows a direct path. In every case, the device dials out, so nothing changes on the router.
Pick the model first, then the vendor. If you need a simple host and port for ad hoc access, Pinggy is hard to beat. If you want no public ports and are willing to install a client everywhere, Tailscale is the right model. If you want the same dashboard-and-proxy experience with a lower price, RemoteIoT is the closest swap. If OTA and configuration matter, qbee.io is the only serious candidate here. If you already live in Cloudflare's ecosystem, Cloudflare Tunnel will feel natural.
Whichever you choose, run the new agent next to SocketXP on one device, confirm SSH works from your usual client, and only then roll it out to the fleet. Remote access is a critical path, not a marketing promise. Test it, monitor it, and keep the recovery path simple.
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