Authentication Without the Middleman
Credentials verified locally, in the browser. No server calls. No passwords. No tracking.
Email-based login that issues cryptographic credentials stored in your users' browsers. Verification happens client-side - your servers never touch auth traffic.
Checking credentials...
How Lemma Works
Cryptographic credentials issued via email, stored in the browser, verified without server calls. No sessions. No passwords. No tracking.
Privacy by Design
Credentials encrypted in user's browser. Zero tracking. Zero data collection. Local verification means your users' activity stays private.
Zero Server Calls
Authentication happens in the browser. No API latency. No session lookups. Ed25519 signature verification in sub-milliseconds.
Passwordless
Email confirmation creates cryptographic credential. No passwords to remember, reset, or leak. Auto-sign-in when valid.
Easy Integration
Works alongside existing auth. SDK integration in 5 minutes. Enhance login without replacing your current system.
Built-In Bot Resistance
Cryptographic nonces prevent replay attacks. No reCAPTCHA needed. Bots cannot reuse stolen credentials.
Session-Free
Zero server sessions. Verification on user's device. Infinite scalability. No tracking.
Proof of Humanity
Verify you're human once, use everywhere. Sybil-resistant credentials that protect against bots and fake accounts.
One-Time Verification
- ✓ Stripe Identity KYC - Government ID verification
- ✓ Cross-site recognition - Works on all network sites
- ✓ Privacy-preserving - Sites only know you're human
- ✓ Bot resistance - Cryptographic credentials that can't be forged or replayed
Not Yet Verified
Complete a one-time verification to prove you're human
Free during beta
Join the Beta
Free access to privacy-first authentication. No credit card required.
Passwordless • Privacy-first • Works offline