SecurityZITADEL
Open-source, multi-tenant identity infrastructure with SSO, MFA, passkeys, and an event-sourced audit trail.
Security
SecurityKinde
All-in-one auth, billing and feature flags for modern SaaS — 10,500 MAU free, SOC 2 + ISO 27001 certified.
SecurityArcjet
Runtime application security as code — bot detection, rate limiting, email validation and Shield WAF for Node, Next.js, Bun, Deno and Python.
SecurityStytch
Developer-first identity platform with passwordless auth, passkeys, SSO, fraud prevention and AI-agent identity in a single API.
SecurityDoppler
Cloud-based secrets manager with a developer-first CLI, 20+ sync integrations, and SOC 2 / ISO 27001 compliance.
SecurityStack Auth
The open-source Auth0 & Clerk alternative — 5-minute Next.js setup, 10,000 MAU free, MIT + AGPLv3.
SecurityProton Pass
Open-source, end-to-end encrypted password manager from the makers of Proton Mail
SecurityWorkOS
Developer-first enterprise identity — SAML SSO, SCIM, audit logs and AuthKit behind OpenAI, Cursor and Vercel
SecurityEnte
Open-source, end-to-end encrypted Google Photos alternative — and a free 2FA app from the same team.
SecurityRustDesk
Open-source, self-hosted remote desktop — a fast Rust+Flutter alternative to TeamViewer and AnyDesk.
SecurityLogto
Open-source auth infrastructure with multi-tenancy, SSO, and RBAC built on OIDC and OAuth 2.1.
Securityauthentik
Open-source identity provider with a visual flow editor for SAML, OIDC, LDAP and RADIUS.
SecurityBitwarden
Open-source password manager — unlimited free vault on every device, AES-256 encryption, audited annually.
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