AnonAddy alternatives are alias services forwarding mail to an existing inbox. AnonAddy is now addy.io, whose free plan allows 10 MB a month, and the alternatives examined here are SimpleLogin, Firefox Relay, DuckDuckGo Email Protection, Fastmail Masked Email and AliasFleet. The comparison covers price, alias limits, replies, custom domains and setup. An email alias in this context is a forwarding address, and mail sent to it arrives in the real inbox.
The addy.io baseline
addy.io is an open-source email forwarding service that works with any inbox provider, so no mailbox migration is required. The user picks a username and receives a personal subdomain, and any address under it can be handed out at sign-up. Aliases can be deactivated in one click, and mail to a deactivated alias is discarded. The service also supports GPG and OpenPGP encryption, rules for matching mail, labels, a blocklist and a developer API. Forwarding follows the pattern in guides to how email aliases actually work, where the alias stands between sender and inbox, and the alias address remains the address the sender sees.
The addy.io homepage on 30 October 2026 listed the following pricing. The free plan costs $0 and includes unlimited aliases on the username, 10 random aliases, and forwarding to 1 inbox. It also includes alias domains such as anonaddy.com and anonaddy.me, and a limit of 10 MB of forwarded mail a month. The Lite plan costs $1 a month billed yearly, with replies, sending from aliases, and 1 own domain. The Pro plan costs $3 a month billed yearly or $4 monthly, with unlimited random aliases, up to 20 own domains and 30 inboxes. The free plan is generous on alias count and tight on bandwidth and replies.
Comparison of the main services
The table below uses figures verified on provider pages on 30 October 2026, except DuckDuckGo figures, which come from October 2026 comparisons. Firefox Relay Premium pricing is not shown, because the Relay page on that date directed new subscribers to a waitlist and showed no price. AliasFleet figures come from the pricing FAQ, because the plan cards did not render in the text fetch. The sections below explain the figures in context.
| Service | Free allowance | Paid plan from | Replies on free | Custom domain |
|---|---|---|---|---|
| addy.io | Unlimited username aliases, 10 random aliases, 10 MB a month | $1 a month billed yearly (Lite) | No | Lite: 1 domain; Pro: up to 20 |
| SimpleLogin | 10 aliases, unlimited bandwidth | $36 a year or $4 billed monthly (Premium) | Yes | Premium: unlimited |
| Firefox Relay | 5 masks | Waitlist, price not shown | No | No, Premium gives a Relay subdomain |
| DuckDuckGo Email Protection | Effectively unlimited private addresses, as reported in comparisons | Free only, no paid tier described | Described as yes | No |
| Fastmail Masked Email | No free tier in the pricing list | $5 a month billed yearly (Individual) | Not applicable, no free tier | Yes |
| AliasFleet | 10 active aliases, 100 MB a month | $7 a month Founders Club Pro, normally $12 | Yes, two-way reply routing | Pro: up to 3 domains |
SimpleLogin
SimpleLogin is an open-source alias service owned by Proton, and its pricing page states that it is 100 percent funded by the community. The free plan costs $0 and includes 10 aliases, unlimited bandwidth, replies from an alias, and 1 mailbox. It also includes browser extensions, iOS and Android apps, and account security with TOTP or WebAuthn. The Premium plan costs $36 a year or $4 billed monthly, with unlimited aliases, unlimited custom domains, catch-all and PGP encryption. Premium also includes Proton Pass premium features, according to the same pricing page, which is listed at SimpleLogin pricing. The same page states that the service does not use user data, track users, or show advertising, and states that the service is open source and can be self-hosted.
SimpleLogin combines replies on the free tier with unlimited bandwidth and a 10 alias cap. The free plan has no bandwidth cap, and the reply feature works from the start. The trade is the 10 alias cap, which runs out fast under a one-alias-per-site pattern, because each new site takes one of the ten slots. When a subscription ends, created aliases keep working, and new aliases past 10 are blocked. That pattern is set out in guides to a different email for every website.
Firefox Relay
Firefox Relay is Mozilla's email masking service, and its masks forward mail to the real inbox. The Relay premium page on 30 October 2026 stated that everyone gets 5 email masks for free, and Premium adds unlimited masks. Premium also adds anonymous replies, promotional email blocking and tracker removal, according to the same page. The page directed new Premium subscribers to a waitlist and showed no price. The full feature list is set out on the Relay Premium page, and the wider service is described on the Relay homepage.
Relay is a Firefox browser service with 5 free masks and no custom domain support. The browser extension puts mask creation inside sign-up forms, according to the Mozilla Relay support page, which keeps the mask close to the point of use. The limits are clear in the feature list, because 5 free masks is a small allowance and there is no custom domain support. Premium gives a subdomain under Mozilla's domain rather than a domain the user owns, and the waitlist means the paid tier cannot simply be bought from that page. Some Mozilla support material describes 50 free masks, which conflicts with the 5 on the premium page. This article follows the premium page.
DuckDuckGo Email Protection
DuckDuckGo Email Protection is a free forwarding service described in October 2026 comparisons, because the fetch of duckduckgo.com/email failed during checks on 30 October 2026, and the details in this section are reported as described rather than verified on the provider page. The service gives the user a personal @duck.com address and private @duck.com addresses for individual sites. Incoming mail has recognised trackers removed before forwarding to the existing inbox, and replies use the receiving Duck Address. The service has no paid tier described in October 2026 comparisons, and no custom domain support is described there. A personal Duck Address can start a new message through a special sending format, while random private addresses are mainly intended for sign-ups and replies, as described in October 2026 comparisons. The company homepage is linked here only as a general reference at DuckDuckGo.
DuckDuckGo Email Protection is free, with a private address count described as effectively unlimited in October 2026 comparisons. Nothing needs to be migrated, because the service sits in front of Gmail, Outlook, Apple Mail, Proton or another existing inbox. No custom domain support is described in October 2026 comparisons, which means Duck Addresses cannot move to another provider as a set. Tracker removal is described as covering recognised trackers rather than every tracker. The safety of aliases in general, separate from any one provider, is covered in the guide to whether email aliases are safe.
Fastmail Masked Email
Fastmail is a paid mailbox service rather than a forwarding layer, and Masked Email is its alias feature. A masked address is generated for a site, mail to it arrives inside Fastmail, and replies use the masked address. An active mask can be selected when composing a new message, which keeps the masked address in use beyond replies. Fastmail's own pricing page on 30 October 2026 listed Individual at $6 a month, or $5 a month when billed as $60 for 12 months. The page listed Masked Email, custom domains, calendars, contacts and files among the features on all plans, with figures on the Fastmail pricing page. The distinction between a forwarding layer and a full mailbox is in the guide to email forwarding and aliases.
Fastmail is a paid mailbox service with Masked Email built in, rather than a forwarding layer over another inbox. The alias system, inbox, calendars and contacts sit in one paid account, with files also included among the features on all plans. Integrations with 1Password and Bitwarden can be connected to a Fastmail account for integration when signing up to new sites, as described on the Fastmail Masked Email page. The cost is the loss of the existing inbox, because mail moves into Fastmail instead of forwarding to an inbox the user already uses. The main Fastmail site is linked here for reference at Fastmail.
Price, limits and domains
The choice turns on four factors, and each service answers them differently across the table above. The first factor is how many aliases the reader actually needs, because addy.io free and DuckDuckGo free allow many aliases. SimpleLogin free stops at 10, and Relay free stops at 5 on its own premium page, which limits both for a large one-alias-per-site set. The second factor is replies on the free tier, which SimpleLogin and AliasFleet include and addy.io and Relay do not. The third factor is custom domains, which addy.io Lite, SimpleLogin Premium, Fastmail and AliasFleet Pro support. The fourth factor is how much change the reader wants, because the forwarding services leave the existing inbox in place, while Fastmail replaces it.
None of these services fits a bank account, where the bank gets a permanent real dedicated address. That address is never a masked or relay alias, because recovery, statements and fraud alerts depend on it. The same separation applies where recovery depends on a single stable address, because a paused alias breaks the recovery path for that account. That limit follows from forwarding itself, not from any one provider. A reader checking for a leaked address can use the guide to checking for a leaked email and the database at Have I Been Pwned.
The AliasFleet service
AliasFleet is an email alias service built around managed, persistent identities, with one alias per site and forwarding to the real inbox. Its pricing FAQ on 30 October 2026 stated a free tier with 10 active aliases, 1 verified destination inbox, and 3 managed subdomains. The same FAQ stated 100 MB monthly bandwidth and two-way reply routing on the free tier. The FAQ also stated Founders Club pricing of $7 a month for Pro, normally $12, and $17 a month for Business, normally $29. Those figures are set out on the AliasFleet pricing page. AliasFleet does not provide a mailbox, so it sits in the same forwarding category as addy.io and SimpleLogin rather than in the Fastmail category.
A direct comparison with addy.io is published at the AliasFleet versus addy.io page. The Business tier suits a reader managing aliases for a small team. Pro supports up to 3 custom domains and Business supports up to 10, according to the same FAQ, with a 7-day money-back guarantee on a first Pro or Business payment. AliasFleet does not offer a free tier with unlimited aliases. The free tier limit of 10 active aliases is the main constraint for a reader following a one-alias-per-site pattern.
Overall comparison
addy.io offers a free plan with unlimited username aliases, 10 random aliases and a 10 MB monthly limit, with open-source code, encryption options and rules. SimpleLogin includes replies on its free plan, and Relay offers 5 free masks through Firefox. DuckDuckGo Email Protection is free, removes recognised trackers before forwarding, and has no paid tier described. Fastmail provides a mailbox with Masked Email built in, with the alias system and the inbox in one account. AliasFleet sits between addy.io and SimpleLogin, with reply routing on the free tier, domains on paid tiers, and a free tier limit of 10 active aliases. On the free tiers, SimpleLogin and AliasFleet include reply routing, addy.io and Relay keep replies behind paid tiers, and DuckDuckGo Email Protection is described as supporting replies, while custom domain support is limited to addy.io Lite and Pro, SimpleLogin Premium, Fastmail and AliasFleet Pro.
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