Enterprise authentication that's secure by default, fast by design, and simple to integrate.
Make authentication secure by default, fast by design, and simple to integrate.
Auth1 is an enterprise authentication platform built for multi-tenant SaaS. We handle the hardest parts of auth — SMS OTP, email magic links, OAuth, MFA, session management, webhook delivery, and compliance — so development teams can focus on building their product.
Auth1 provides a complete authentication backend as a service. Every tenant gets isolated infrastructure, dedicated API keys, and full control over their auth flows:
42x faster authentication. Auth1's Rust-native middleware processes auth requests 42x faster than traditional Node.js implementations. Post-quantum ready with ML-DSA-65 and ML-KEM-768.
Most auth providers treat security as a feature. We treat it as the foundation. Every layer of Auth1 is built with security-first principles: Argon2id password hashing, timing-safe OTP verification, 3-layer rate limiting, BotShield bot detection, VOIP number filtering, and circuit breakers to prevent cascading failures.
Eric Beans — CEO / Founder
Auth1 is a focused, independent company building critical infrastructure for SaaS platforms. We believe authentication should be invisible to end users and effortless for developers.
Auth1 is headquartered in Tampa, FL, United States.
General Support: support@auth1.ai
Sales: sales@auth1.ai
Security: security@auth1.ai