Best Auth & Security for Founders
48 tools reviewed honest opinions, no fluff.
Our Picks
The auth & security tools we recommend most for founders.
Clerk
Drop-in auth with beautiful components. User management UI that actually looks good out of the box.
Supabase Auth
Free auth that comes with Supabase. Social logins, magic links, RLS. No-brainer if you're there.
NextAuth
Auth for Next.js that's free and flexible. Now Auth.js, works with any framework too.
1Password
The password manager your team actually uses. Developer secrets, SSH keys, everything locked down.
Bitwarden
Open source password management. Self-host it if you're that person. Solid and truly free.
Passwordless auth done right. Magic links, OTPs, OAuth, biometrics. Clean SDKs, generous free tier. Clerk competitor.
Open-source passkey authentication. WebAuthn-first, FIDO2 compliant. The password is dead, Hanko is the funeral director.
Enterprise SSO and directory sync. When your SaaS lands that first enterprise customer and they need SAML/SCIM.
Auth and user management with feature flags baked in. Australian-made, developer-friendly, and growing fast.
Firebase Auth
Google's auth service. Dead simple setup, tons of providers, free tier handles most startups. The easy button.
Open-source Auth0 alternative you can actually self-host in an afternoon. Great middle ground between DIY and paying for Clerk.
Use when: You want to self-host without writing auth from scratch
TypeScript-first auth library that plugs into your own DB. The new favorite for Next.js devs allergic to vendor lock-in.
Use when: You want NextAuth but actually well-designed
All Auth & Security Tools
48 tools reviewed with honest opinions.
Clerk
Drop-in auth with beautiful components. User management UI that actually looks good out of the box.
Supabase Auth
Free auth that comes with Supabase. Social logins, magic links, RLS. No-brainer if you're there.
NextAuth
Auth for Next.js that's free and flexible. Now Auth.js, works with any framework too.
Auth0
Enterprise auth that handles every edge case. Overkill for side projects, essential for serious apps.
1Password
The password manager your team actually uses. Developer secrets, SSH keys, everything locked down.
Bitwarden
Open source password management. Self-host it if you're that person. Solid and truly free.
Auth library that doesn't try to own your users. Minimal, flexible, fully open source.
Passwordless auth done right. Magic links, OTPs, OAuth, biometrics. Clean SDKs, generous free tier. Clerk competitor.
Open-source passkey authentication. WebAuthn-first, FIDO2 compliant. The password is dead, Hanko is the funeral director.
Enterprise SSO and directory sync. When your SaaS lands that first enterprise customer and they need SAML/SCIM.
Auth and user management with feature flags baked in. Australian-made, developer-friendly, and growing fast.
Firebase Auth
Google's auth service. Dead simple setup, tons of providers, free tier handles most startups. The easy button.
Self-hostable full-featured auth. Free forever if you run it yourself and the docs are genuinely excellent.
Use when: You need to own your auth data on your infra
Drag-and-drop auth flow builder. Non-engineers can literally design login journeys with a visual canvas.
Use when: You want to A/B test login flows without shipping code
Open-source Auth0 alternative you can actually self-host in an afternoon. Great middle ground between DIY and paying for Clerk.
Use when: You want to self-host without writing auth from scratch
TypeScript-first auth library that plugs into your own DB. The new favorite for Next.js devs allergic to vendor lock-in.
Use when: You want NextAuth but actually well-designed
Open-source authentication library for Next.js, now known as Auth.js.
Keycloak
Open-source identity and access management with SSO, OAuth, and OIDC.
Authentik
Open-source identity provider with policies, flows, and enterprise SSO.
Open-source identity infrastructure including Kratos, Hydra, and Keto.
Okta
Enterprise identity platform for workforce SSO, MFA, and lifecycle management.
Microsoft cloud identity service formerly known as Azure Active Directory.
JumpCloud
Open directory platform unifying SSO, device management, and identity.
B2B user management platform with login box, SSO, and admin portal.
B2B authentication with hosted UIs, orgs, and SSO out of the box.
Open-source identity infrastructure with admin console and SDKs.
Passwordless and Web3 wallet-based auth via magic links.
Passkey authentication service from 1Password for any web or mobile app.
Passwordless workforce auth using device-bound cryptographic credentials.
Identity, fraud, and authorization platform for large enterprises.
Ping Identity
Enterprise identity platform for workforce and customer identity.
OneLogin
Workforce identity and access management with SSO and MFA.
Cognito
AWS managed identity service for app sign-up, sign-in, and federation.
OpenID Connect and OAuth 2 framework for ASP.NET Core.
Hosted authentication with multi-tenant orgs and prebuilt UI.
WorkOS-built drop-in authentication UI with social, SSO, and passkeys.
End-to-end encrypted user database for static and serverless apps.
Open-source authorization layer to externalize roles and policies from app code.
Authorization-as-a-service for fine-grained access control.
Authorization platform with a policy language for fine-grained access control.
Hosted SpiceDB platform implementing Google Zanzibar-style authorization.
Customer identity and onboarding platform for B2B SaaS.
Bitwarden-owned WebAuthn and passkey API for developers.
Open-source B2B authentication platform with SSO and SCIM.
Enterprise SSO and SCIM as APIs for B2B SaaS founders.
Open-source enterprise readiness platform with SAML SSO and audit logs.
WSO2 cloud IDaaS for B2C and B2B authentication.
Successor to NextAuth supporting Next.js, SvelteKit, SolidStart, and Express.
Compare Auth & Security Tools
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