SimpleLogin

What is SimpleLogin

SimpleLogin is an open-source email aliasing service founded by Son Nguyen Kim and acquired by Proton AG in April 2022. It allows users to create unlimited email aliases that forward to a real inbox, enabling anonymous online registration and communication. The service is fully open-source under AGPL-3.0, with both server and client code (browser extensions, mobile apps, JS library) publicly auditable on GitHub. As of 2026-05-30, SimpleLogin reports over 1,000,000 users and is actively maintained with regular updates.

The core function is straightforward: when a website requests an email, users provide an alias instead of their real address. Emails sent to the alias are instantly forwarded, and replies come from the alias while the real address stays hidden. The service also supports reverse aliases for initiating contact with new recipients, though this requires a paid plan.

How no-KYC is it?

SimpleLogin operates with no KYC requirements. The service does not request government ID, phone verification, or real-name registration. Users can sign up with any email address and access the free tier immediately. The Cunicula review explicitly rates it "Zero KYC" and notes no KYC triggers on record. Payment for premium plans can be made with Bitcoin and Monero alongside fiat options, further preserving anonymity. Self-hosting remains possible for users who want complete control over their data without trusting any third-party operator.

Privacy & security

SimpleLogin is based in Switzerland, outside Five Eyes jurisdictions, and benefits from Swiss privacy laws. The Proton acquisition means it now shares corporate ownership with Proton Mail, though SimpleLogin maintains its own infrastructure and codebase. The service has passed independent security audits, with results published on its blog.

Key privacy features include:

• PGP encryption support for forwarded emails
• TOTP and WebAuthn (FIDO) two-factor authentication
• Anti-phishing protections with alias-specific indicators
• haveibeenpwned integration for breach monitoring
• No ads and no data monetization; funding comes entirely from user subscriptions

However, users should note that email forwarding inherently involves trust: SimpleLogin servers can see metadata (sender, recipient, subject lines) even if PGP is used for content. The h25.io review flags "third-party dependency" and "trust-jurisdiction considerations" as key weaknesses. For threat models requiring absolute metadata protection, self-hosting or avoiding email aliasing entirely may be necessary.

Payments, fees & limits

SimpleLogin offers a functional free tier with 10 aliases, unlimited bandwidth, reply-from-alias capability, one mailbox, and browser extensions for Chrome, Firefox, and Safari plus iOS and Android apps. Free users also receive Proton Pass free tier (unlimited logins, unlimited devices).

Premium costs $36/year or $4/month and adds:

• Unlimited aliases
• Unlimited custom domains with catch-all/wildcard support
• 5 subdomains and 50 directories/usernames
• Unlimited mailboxes
• PGP encryption
• Reverse alias creation for initiating emails
• Proton Pass premium features (vaults, secure link sharing, built-in 2FA authenticator, dark web monitoring)

Family discounts exist for additional yearly subscriptions on the first year, though no formal family plan is offered. Students can request discounts via support tickets. Proton Unlimited subscribers receive SimpleLogin Premium bundled at no extra cost.

User experience & support

SimpleLogin provides broad platform coverage with native apps, browser extensions, and detailed documentation. The interface allows quick alias creation on the go, one-click unsubscribe, and alias transfer between accounts. Custom domain setup is well-documented with registrar-specific guides for NameCheap, GoDaddy, Google, Cloudflare, and Gandi.

Community support channels include a forum, GitHub repository, and official subreddit moderated by SimpleLogin and Proton employees. Trustpilot shows 33 reviews as of the latest crawl. Some users on Reddit have reported deliverability issues where aliases are flagged by certain vendors, and the h25.io review notes "deliverability quirks" as a recurring concern. The service is not a disposable email provider-aliases are permanent until deleted, and anti-abuse measures exist to prevent spam misuse.

Who it's for

SimpleLogin suits privacy-conscious individuals who want to compartmentalize their online identities without managing multiple email accounts. It works well for newsletter signups, online shopping, social media registration, and reducing breach exposure. The free tier is adequate for light users; power users with custom domains will need Premium. Those requiring metadata-resistant communication should consider self-hosting or alternatives like running their own mail server. The Proton integration adds value for existing Proton ecosystem users, though it also centralizes trust in one corporate entity.