Auth0 Alternatives in 2026 - 7 Options Compared

The best Auth0 alternatives in 2026 are Clerk (fastest for React apps), WorkOS AuthKit (B2B and enterprise SSO, with a free tier up to 1M MAU), Firebase Authentication and Supabase Auth (cheap auth bundled with a backend), Keycloak and Better Auth (self-hosted, open source), and StitchDB (auth that lives in your own Postgres database, hosted in the EU). Which one fits depends on one question: do you want a standalone identity service, or auth that comes with your database?

Most teams start looking for an Auth0 alternative for the same reason: the jump from the free plan to the first paid tier. This guide puts current prices side by side, explains what each option is good at, and says where Auth0 is still the right call.

#Auth0 pricing in short

As of November 2026, Auth0's pricing page lists:

• Free: up to 25,000 monthly active users (MAU), one custom domain (credit card verification required), 5 organizations and 1 enterprise SSO connection.
• B2C Essentials: from $35/month for 500 MAU. At 2,500 MAU the price is $175/month.
• B2C Professional: from $240/month for 500 MAU.
• B2B Essentials: from $150/month, with 3 enterprise SSO connections included.
• B2B Professional: from $800/month, with 5 enterprise SSO connections.
• Enterprise: custom pricing.

The free tier is generous for consumer apps. The pain starts when you need a paid feature at a few thousand users, because paid tiers are priced by MAU bands. Check the current numbers on Auth0's pricing page before you decide.

#Auth0 alternatives at a glance

#1. StitchDB Auth

StitchDB is a hosted backend: each project gets a dedicated Postgres database plus Auth, a REST and GraphQL API, Realtime, Storage and Edge Functions. Users are stored in your database in auth.users, and every signed-in request carries a JWT your Row Level Security policies can read with auth.uid().

What you get on every plan, according to the docs:

• E-mail and password, magic links and one-time codes, 19 OAuth providers (Google, GitHub, Apple, Microsoft, Discord and more), phone sign-in with your own SMS provider, anonymous users, Web3 wallets and passkeys.
• TOTP and SMS multi-factor auth, with an aal2 claim you can require in a policy.
• SAML 2.0 single sign-on for customers on Okta, Entra ID or Google Workspace.
• Organizations: teams, roles, e-mail invites and JWT claims for B2B apps.
• A hosted sign-in page at https://<project-ref>.p.stitchdb.com/login, so you can skip building auth screens.
• Auth hooks for custom claims, your own e-mail or SMS sender and sign-up rules.

Plan limits as of November 2026: Free includes 50,000 MAU, Pro ($15.99/month) 100,000 MAU and 50 SSO users, Scale ($49/month) 200,000 MAU. With the spend cap off, extra MAU on Pro cost $0.002 each.

Because users sit next to your data, authorization is a SQL policy, not a separate rules engine:

create policy "Users read their own orders" on public.orders
  for select to authenticated
  using (customer_id = auth.uid());

Pros: auth and database in one bill; user data stays in EU data centers (Germany and Finland); the API is compatible with the open-source Supabase stack, so existing client libraries work.

Cons: EU regions only, so users far from Europe get more latency; it is a younger platform than Auth0; there is no self-hosted edition (local development runs with stitchdb start). If you only want auth and keep your data elsewhere, a standalone provider may be simpler.

#2. Clerk

Clerk is the option most people compare first, because its React components (<SignIn />, <UserButton />) make the first hour very fast. As of November 2026 its pricing page lists:

• Hobby: free, 50,000 monthly retained users (MRU) per app. No MFA, no passkeys, Clerk branding stays.
• Pro: $25/month ($20 billed annually), 50,000 MRU included, then $0.02 per MRU up to 100,000. MFA, passkeys, branding removal and one SAML connection (extra connections $75/month).
• Business: $300/month.

Organizations are included up to 100 monthly retained organizations per app with up to 20 members each; more needs a B2B add-on at $100/month.

Pick Clerk when you build with React or Next.js and value polished UI over price at scale. Skip it when most of your app logic lives in the database, because you will sync users into it anyway. See the Clerk alternatives guide and Clerk vs Auth0 for a deeper look.

#3. WorkOS AuthKit

WorkOS targets B2B SaaS. Its user management product, AuthKit, is free for the first 1 million MAU, then $2,500 per additional million. Enterprise SSO connections are billed per connection: $125 each for 1-15 connections, with volume discounts above that.

Pick WorkOS when you sell to companies that ask for SAML, SCIM and audit logs, and you want to price SSO into your enterprise tier. Skip it when you are building a consumer app and will never need enterprise connections; the core value is the B2B features.

#4. Firebase Authentication

Firebase Authentication is free up to 50K MAU on the Spark plan, with SAML and OIDC limited to 50 MAU there. Phone sign-in needs the Blaze plan and is billed per SMS. There are also daily limits worth knowing: on Spark, Firebase sends at most 5 e-mail link sign-in e-mails and 150 password reset e-mails per day (Firebase Auth limits).

Pick Firebase Auth when your app already uses Firestore and Cloud Functions. Skip it when you want relational data or need passwordless e-mail on a free plan. More in Firebase Authentication alternatives.

#5. Supabase Auth

Supabase Auth is the open-source GoTrue-based auth server that StitchDB's Auth API is also compatible with. Supabase's free plan includes 50,000 MAU; Pro starts at $25/month with 100,000 MAU and then $0.00325 per MAU, as of November 2026. Free projects are paused after one week of inactivity.

Pick Supabase when you want Postgres plus auth, many regions worldwide, and the option to self-host with Docker. Skip it when you need EU-only hosting at a lower entry price, or you don't want free projects to pause.

#6. Keycloak

Keycloak is an open-source identity and access management server and a CNCF incubation project. It supports OpenID Connect, OAuth 2.0 and SAML, can broker logins to other identity providers and connects to LDAP and Active Directory.

Pick Keycloak when you need full control, on-premise deployment or directory federation, and you have someone to run and upgrade it. Skip it when you are a small team: running an identity server is real operational work.

#7. Better Auth

Better Auth is an open-source TypeScript authentication framework that runs inside your own app, with plugins for two-factor auth, passkeys and organizations. Users live in your database. It also offers optional paid infrastructure (dashboard, audit logs) on top.

Pick Better Auth when you have a TypeScript server and want auth as code you own. Skip it when you want a managed service that handles e-mail delivery, rate limits and abuse protection for you.

#When Auth0 is still the right choice

Auth0 remains strong when you need a mature, standalone identity platform with many enterprise integrations, extensive compliance documentation and a long track record. If your security team already approved it, or you need complex B2B flows across many apps, staying can be cheaper than migrating. Its free tier of 25,000 MAU is also fine for many consumer apps that need no paid features.

#How to choose

1. Where should user records live? If the answer is "next to my data", pick an auth that is part of your database platform (StitchDB, Supabase, Firebase). You avoid webhooks that copy users around.
2. Do you sell to enterprises? SAML per customer favors WorkOS, Auth0 B2B or a backend with SSO built in. Count how many SSO connections you will need in year one.
3. Do you need self-hosting? Keycloak, Better Auth or self-hosted Supabase.
4. Where are your users? For EU users and GDPR questions, EU hosting simplifies data processing agreements. See StitchDB security.
5. Price at 10x your current users, not today. MAU pricing hurts later, not now.

#Migrating users off Auth0

The hard part of any migration is passwords. Check with Auth0 whether you can get your users' password hashes for your plan; if you can't, users reset their password or sign in once with a magic link. A common pattern:

1. Export users (id, e-mail, metadata, linked providers).
2. Import them into the new system, keeping the same user id if possible so foreign keys survive.
3. Re-create OAuth apps with the new callback URL, for StitchDB https://<project-ref>.p.stitchdb.com/auth/v1/callback.
4. Send a magic link to users without an imported password hash.

On StitchDB, magic links are one call:

import { createClient } from 'stitchdb-js'

const stitchdb = createClient('https://<project-ref>.p.stitchdb.com', '<anon-key>')

await stitchdb.auth.signInWithOtp({
  email: '[email protected]',
  options: { emailRedirectTo: 'https://example.com/welcome' },
})

#FAQ

#What is the cheapest Auth0 alternative?

For managed services, WorkOS AuthKit (free to 1M MAU) and backends with built-in auth such as StitchDB (50,000 MAU free, Pro $15.99/month for 100,000) are the cheapest as of November 2026. Self-hosted Keycloak or Better Auth cost only your servers.

#Is there an open source Auth0 alternative?

Yes. Keycloak, Better Auth and Supabase Auth are open source. StitchDB is not self-hostable, but it speaks the same Auth API as the open-source Supabase stack, so you are not locked into proprietary client code.

#Can I keep using Auth0 with a Postgres backend?

Yes. You can verify Auth0 tokens on your server or sync users into a table. You lose the simplicity of auth.uid() in Row Level Security policies, though, and you pay for two services.

#Does StitchDB support enterprise SSO?

Yes, SAML 2.0 single sign-on is documented, with one identity provider per customer organization. The Pro plan includes 50 SSO monthly active users and Scale 100; extra SSO users cost $0.01 each on Pro.

Ready to try auth that lives in your own Postgres? Create a free StitchDB project.