12 tools in this category
Authentication and identity management tools for securing user access in web and mobile applications.
For developers who need reliable, scalable auth without building it from scratch.
Editor picks
Auth.js
Free planNext.js products that need custom-branded auth without Clerk
Open-source authentication for Next.js and other frameworks: OAuth providers, credentials, sessions, and adapters you host yourself.
Maximum flexibility at the cost of engineering and security ownership
Auth0
Free planB2B SaaS selling into IT buyers who expect SAML and SCIM patterns
Okta’s developer-centric identity platform: Universal Login, rich protocol support, and enterprise extensions for B2B and workforce scenarios.
Depth of enterprise features versus lighter developer-auth startups
Clerk
Free planNext.js and React apps shipping auth in days not quarters
Drop-in authentication UI and user management for React and Next.js, with hosted sign-in, sessions, and orgs.
Faster UI delivery than wiring OAuth flows by hand
Top comparison
Auth.js vs Auth0
Next.js products that need custom-branded auth without Clerk vs B2B SaaS selling into IT buyers who expect SAML and SCIM patterns
Compare side by sideClerk vs Descope
Next.js and React apps shipping auth in days not quarters vs Teams that change onboarding frequently and want PMs involved safely
Compare side by sideAll auth & identity tools
Auth.js
Free planNext.js products that need custom-branded auth without Clerk
Open-source authentication for Next.js and other frameworks: OAuth providers, credentials, sessions, and adapters you host yourself.
Maximum flexibility at the cost of engineering and security ownership
Auth0
Free planB2B SaaS selling into IT buyers who expect SAML and SCIM patterns
Okta’s developer-centric identity platform: Universal Login, rich protocol support, and enterprise extensions for B2B and workforce scenarios.
Depth of enterprise features versus lighter developer-auth startups
Clerk
Free planNext.js and React apps shipping auth in days not quarters
Drop-in authentication UI and user management for React and Next.js, with hosted sign-in, sessions, and orgs.
Faster UI delivery than wiring OAuth flows by hand
Descope
Free planTeams that change onboarding frequently and want PMs involved safely
Drag-and-drop auth flows plus SDKs: product and security teams iterate on login, MFA, and risk without redeploying frontend code for every tweak.
Flow builder UX is the differentiator—prototype before committing engineering
Firebase Auth
Free planMobile and web apps already using Firebase or planning to
Google-backed auth for passwords, federated IdPs, phone/SMS OTP, and anonymous users—tight fit when you already live on Firebase.
Pricing and quotas sit inside broader Firebase/Google Cloud billing—model MAU and phone auth volume early
Keycloak
Free planRegulated or on-prem environments that forbid external auth UIs
Open-source identity and access management you run yourself: realms, brokers, SAML/OIDC, and user federation for teams that own the metal.
Operational load is real—budget for HA, patching, and theme maintenance
Lucia
Free planTeams outgrowing ad-hoc session cookies who still want code ownership
TypeScript session and user-id helper—not a hosted IdP. You keep the database schema and plug in passwords, OAuth, or passkeys yourself.
You own security reviews—Lucia will not file your SOC2 paperwork
Magic
Free planConsumer web3 apps onboarding users who are not power users
Passwordless login with an emphasis on embedded wallets and web3-friendly identity for apps bridging crypto and traditional users.
Pricing and custody model should be reviewed with legal for regulated use cases
Okta
Free planEnterprises standardizing employee access across SaaS portfolios
Full-stack identity for workforce and customer scenarios: SSO, lifecycle, governance, and deep Okta Integration Network coverage.
Procurement cycles and professional services are real costs beyond per-user pricing
Stytch
Free planGrowth teams A/B testing signup and login conversion
API-first passwordless auth: email magic links, OTPs, passkeys, and session management aimed at conversion-sensitive flows.
Strong fit for OTP-heavy products; watch SMS cost and regional deliverability
Supabase Auth
Free planSupabase-backed apps that want auth without a separate user store
Postgres-native auth: JWTs, Row Level Security hooks, and social/magic-link flows that live beside your Supabase database.
Tighter coupling to Postgres can simplify mental models versus external user directories
WorkOS
Free planB2B products closing deals that demand SSO on the security questionnaire
Enterprise login building blocks: SSO, SCIM directory sync, and admin portals—meant to sit beside your app’s existing auth.
Purpose-built for enterprise attach versus all-in-one hosted login startups
