The best SimpleLogin alternatives in 2026 are email alias services that forward mail to an existing inbox under a separate address for each website or service. SimpleLogin, owned by Proton, is the reference service in this comparison. The alternatives differ mainly on price, on the number of aliases allowed, on custom domain support, on reply support, and on whether the service is a forwarding layer or a full mailbox. This guide compares SimpleLogin with addy.io, Firefox Relay, DuckDuckGo Email Protection, Fastmail, and AliasFleet, using prices and limits checked on provider pages on 30 October 2026, with gaps stated where a provider page did not show a figure.
Email alias operation
An email alias is a forwarding address that sits in front of a real inbox, and the guide to what an email alias is describes the arrangement in detail. A website receives the alias, mail to it is forwarded to the real inbox, and replies can use the alias. When one alias starts to receive unwanted mail, that alias can be paused or removed. The separation matters because a leak of one address does not expose every account that shares the same real address, and the forwarding process is described in the guide to how email aliases actually work.
The reason some SimpleLogin users look elsewhere is presented here as attributed concern, not as a measured fact. No verified survey or churn data was found for this guide. Competitor pages cite price, complexity, and tighter integration with Proton products as concerns. Those claims are marketing material from competitors rather than evidence about user behaviour, and price is the only one of the three that is directly verifiable in this comparison.
Price and limit comparison
The table below sets out the free allowance, the paid entry price verified on 30 October 2026, custom domain support, and reply support for each service. Prices are stated as listed on the provider pages checked on that date, and regional prices and taxes are not covered. The sections that follow give the limits behind each figure.
| Service | Free allowance | Paid entry verified 30 October 2026 | Custom domain | Reply from alias |
|---|---|---|---|---|
| SimpleLogin | 10 aliases, 1 mailbox | $36 per year, or $4 per month | Unlimited on Premium | Yes, including on free |
| addy.io | Unlimited standard aliases, 10 random aliases, 10 MB per month, 1 inbox | Lite at $1 per month billed yearly; Pro at $3 per month billed yearly | Yes on Lite (1 domain) and Pro (up to 20 domains) | Paid plans only |
| Firefox Relay | 5 masks | Price not shown on the provider page checked | No, Relay subdomain on paid tier | Paid tier only |
| DuckDuckGo Email Protection | Secondary summaries: effectively unlimited private addresses | Secondary summaries: free, not provider verified | No, in secondary summaries | Yes, in secondary summaries |
| Fastmail | No free plan stated | Individual $6 per month, or $5 per month yearly | Yes, on all plans | Yes, as Masked Email |
| AliasFleet | 10 active aliases, 1 inbox, 100 MB per month | Pro $12 per month, Founders Club $7 per month | Pro up to 3 custom domains | Yes, two-way reply routing |
SimpleLogin
SimpleLogin is an open source alias service owned by Proton, and it can be self-hosted by a reader who wants to run the software on separate infrastructure. The free plan costs $0 and includes 10 aliases, unlimited bandwidth, reply from an alias, 1 mailbox, browser extensions for Chrome, Firefox, and Safari, and apps for iOS and Android, according to the SimpleLogin pricing page. The free plan does not include a custom domain. Premium costs $36 per year or $4 billed monthly, and it includes unlimited aliases, unlimited custom domains, unlimited mailboxes, catch-all domain support, 5 subdomains, 50 directories or usernames, and PGP encryption.
Premium now also includes Proton Pass premium features, according to the same pricing page, so the subscription is also a bundle with a password manager. That bundle suits a reader who already uses Proton products, and Proton Pass is the product named in that bundle. SimpleLogin also states that aliases created under Premium continue to work after a subscription ends, although no new aliases can be created above the free limit of 10. The bundle value depends on whether the password manager features are used.
addy.io
addy.io, formerly AnonAddy, is an open source alias service run independently, and it can be self-hosted in the same way as SimpleLogin. The free plan costs $0 per month and includes unlimited standard aliases on the user name, 10 random aliases, forwarding to 1 inbox, and 10 MB of forwarded email a month, according to the addy.io home page and the frequently asked questions page. The free plan does not include replies from an alias, and the 10 MB monthly limit is the main constraint for a reader who receives mail with large attachments. Aliases on a domain the user owns are portable, while aliases on addy.io domains only work through addy.io.
Lite costs $1 per month billed yearly, and it adds replies, 1 domain the user owns, forwarding to up to 5 inboxes, and tracking pixel blocking. Pro costs $3 per month billed yearly or $4 monthly, and it adds unlimited random aliases, up to 20 domains the user owns, forwarding to up to 30 inboxes, and no monthly email limit. The gap between Lite at $12 per year and SimpleLogin Premium at $36 per year on yearly billing is the main price difference in this guide. The trade-off is scope, because addy.io also offers rules, labels, and an API.
Firefox Relay
Firefox Relay is Mozilla's masking service, and its addresses are called masks rather than aliases. The free tier gives 5 email masks, according to the Firefox Relay home page, and the paid email tier gives unlimited masks, a unique Relay email domain for creating masks on the go, anonymous replies, and promotional email blocking. The free tier does not include anonymous replies or promotional blocking, and the paid tier does not provide a full custom domain. The domain is a Relay subdomain rather than a domain the user owns, and the Relay Premium page lists the same paid features.
Relay suits a Firefox user who wants masks inside the browser with little setup. The limits are the 5-mask free allowance and the lack of a full custom domain. This guide does not state a Relay Premium price, because the provider page checked on 30 October 2026 listed paid tiers without a price, and a re-check for this rewrite found no standalone Relay Premium price in the fetched page copy. A secondary figure of about $0.99 per month billed yearly in the United States appears in recent summaries, but it was not verified on the provider page.
DuckDuckGo Email Protection
DuckDuckGo Email Protection is a forwarding service from DuckDuckGo that provides a personal @duck.com address and private @duck.com addresses for individual sign-ups. Summaries state that the service removes hidden email trackers from forwarded mail before delivery to the existing inbox. Recent comparison summaries describe it as free with effectively unlimited private addresses and no paid tier. Those summaries also state that it does not offer custom domains. The points in this section are stated as secondary summaries, not as provider-verified facts, because the DuckDuckGo provider page could not be fetched on 30 October 2026.
A further fetch attempt for this rewrite also failed, so the price and limit claims stay hedged. The service suits a reader who wants free forwarding with tracker removal and no subscription, and who does not need a custom domain, because the forwarding layer sits in front of the inbox the reader already uses. Addresses are @duck.com only, so they cannot be moved to another provider, and a reader who later wants a custom domain would need to change every @duck.com address.
Fastmail
Fastmail is a paid mailbox service, not a forwarding layer over Gmail or Outlook, and Masked Email is the alias feature inside that mailbox. The Individual plan costs $6 per month, or $5 per month at $60 for 12 months. That price is taken from the Fastmail pricing page. All plans on that page list Masked Email and use of a domain the user owns. Masked Email addresses arrive inside the Fastmail inbox and replies use the masked address, according to the Masked Email feature page. Fastmail describes the feature in its own help material as follows:
A Masked Email address is a unique, automatically generated email address that can be used in place of your real email address. Masked Email addresses are especially useful when you need to sign up with new services online.
Fastmail suits a reader who wants to replace a mailbox and gain aliases in the same account. The trade-off is price and scope, since the reader pays for a full mailbox even if only aliases are needed, and mail stops when the account closes unless addresses have been migrated beforehand. The Fastmail home page presents the same mailbox scope. The difference from the forwarding services in this guide is therefore structural, because the subscription also buys a mailbox and calendar.
Suitability by requirement
The lowest paid price verified for this guide is addy.io Lite, because it costs $1 per month billed yearly and it includes 1 custom domain and replies. DuckDuckGo Email Protection is tied with the addy.io free plan on free alias allowance, because the secondary summaries describe DuckDuckGo as effectively unlimited and addy.io offers unlimited standard aliases. That claim is subject to the verification gap stated above. The addy.io free plan offers unlimited standard aliases subject to its 10 MB monthly limit. The browser centred option is Firefox Relay, subject to its 5-mask free limit and its Relay subdomain rather than a full custom domain. The full mailbox option is Fastmail, at a higher price than a forwarding-only service. A reader who already uses Proton products has little reason to leave SimpleLogin Premium at $36 per year.
Portability also separates the options, because a custom domain is the only route in this guide that lets a reader keep the same addresses after leaving a provider. Provider-domain aliases stop working when the account closes, and that limit is the key portability point. The custom domain decision is therefore best made before the alias count grows.
AliasFleet in this comparison
AliasFleet is an email alias service that provides managed, persistent aliases, with one alias per site and with pause or removal on leak, forwarding to an existing inbox. The free tier includes 10 active aliases, 1 verified destination inbox, 100 MB monthly forwarding bandwidth, and two-way reply routing, according to the AliasFleet pricing page. Pro is normally $12 per month, with a Founders Club price of $7 per month and lifetime grandfathering stated on the same page, and Pro supports up to 3 custom domains. Prices here come from the FAQ text on the same live page.
AliasFleet does not replace a mailbox, because mail forwards to the inbox the reader already uses, and it does not require self-hosting, unlike the self-hosted route for SimpleLogin and addy.io. AliasFleet also does not require a move to a full mailbox service, unlike Fastmail, and its paid price sits above addy.io Lite and SimpleLogin Premium on yearly billing. A detailed comparison is given on the AliasFleet versus SimpleLogin page.
Price and scope summary
The comparison turns on four points that recur across every service: the paid entry price, the free alias allowance, custom domain support, and whether the product is a forwarding layer or a full mailbox. Figures are the provider figures checked on 30 October 2026, with the DuckDuckGo and Firefox Relay gaps stated where they occur.
Top comments (0)