Editorial take
Why it stands out
Compare Firebase Auth if you are all-in on Google mobile SDKs; compare Auth0 or WorkOS when enterprise SAML and directory sync are the primary sale.
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Tool profile
Postgres-native auth: JWTs, Row Level Security hooks, and social/magic-link flows that live beside your Supabase database.
Supabase-backed apps that want auth without a separate user store
Supabase Auth (GoTrue) treats your database as the source of truth for users while issuing JWTs your API and Row Level Security policies can trust. Email magic links, passwords, and OAuth providers ship with the same dashboard experience as the rest of Supabase, which keeps small teams moving fast. It is a strong default when your product data already lives in Supabase and you want auth, storage, and realtime in one bill—not when you need a standalone enterprise IAM suite on day one.
Quick fit
Editorial take
Compare Firebase Auth if you are all-in on Google mobile SDKs; compare Auth0 or WorkOS when enterprise SAML and directory sync are the primary sale.
What it does well
Primary use cases
Fit notes
Pricing snapshot
Bundled into Supabase project pricing; free tiers cover modest MAU with paid plans scaling by database, bandwidth, and add-ons—check auth-specific limits in project settings.
Compare with
Pressure-test this pick against nearby alternatives.
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
