Auth0 Alternatives
7 Tools Like Auth0
Quick answer: Top Auth0 alternatives include Clerk, Firebase Authentication and Supabase Auth. For open source, look at Supabase Auth and Keycloak. Clerk and Firebase Authentication are free or have free plans.
Auth0 is Okta’s developer-focused authentication platform.
Developers look for Auth0 alternatives because pricing jumps as monthly active users grow.
- 7 alternatives
- 7 with a free plan
- 2 open source
- 1 self-hostable
The best Auth0 alternatives
#1Clerk
clerk.com
Drop-in authentication and user management for React apps.
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In Clerk’s own words: “The easiest way to add authentication and user management to your application. Purpose-built for React, Next.js, Remix, and The Modern Web.”
Clerk has a free plan.
People switching from Auth0 often consider Clerk.
#2Firebase Authentication
firebase.google.com
Google’s hosted auth with social and phone sign-in.
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In Firebase Authentication’s own words: “Discover Firebase, Google’s mobile and web app development platform that helps developers build apps and games that users will love.”
Firebase Authentication has a free plan.
People switching from Auth0 often consider Firebase Authentication.
#3Supabase Auth
supabase.com
Open-source auth built into Supabase.
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In Supabase Auth’s own words: “Add user sign ups and logins to your app. Secure your data with Row Level Security. Works with all major OAuth providers.”
Supabase Auth is open source and has a free plan.
People switching from Auth0 often consider Supabase Auth.
#4Amazon Cognito
aws.amazon.com
User sign-up and sign-in on AWS.
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In Amazon Cognito’s own words: “Implement customer identity and access management (CIAM) that scales to millions of users with Amazon Cognito, fully managed authentication service.”
Amazon Cognito has a free plan.
People switching from Auth0 often consider Amazon Cognito.
#5Keycloak
keycloak.org
Open-source identity and access management.
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In Keycloak’s own words: “Keycloak - the open source identity and access management solution. Add single-sign-on and authentication to applications and secure services with minimum effort.”
Keycloak is open source, is free to use and can be self-hosted.
People switching from Auth0 and Okta often consider Keycloak.
#6Stytch
stytch.com
Authentication and fraud prevention APIs.
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In Stytch’s own words: “APIs and SDKs to integrate authentication and security into your app.”
Stytch has a free plan.
People switching from Auth0 often consider Stytch.
#7WorkOS
workos.com
Enterprise SSO, directory sync and auth for B2B apps.
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In WorkOS’s own words: “Developer APIs/SDKs for Enterprise Ready features like Single Sign-On, Directory Sync, Audit Logging, and more. Get started for free.”
WorkOS has a free plan.
People switching from Auth0 often consider WorkOS.
Listed for information; LaunchStall isn’t affiliated with these companies. Features and plans change — check each site for current details.
How these Auth0 alternatives compare
| Tool | Best for | Where it beats Auth0 | The trade-off |
|---|---|---|---|
| Clerk | React and Next.js apps | Ready-made sign-in components that are quick to add. | Mainly focused on modern JavaScript. |
| Firebase Authentication | Apps on Firebase | Simple, with a generous free tier. | Less suited to enterprise SSO. |
| Supabase Auth | Apps on Supabase | Open source and joined with your Postgres data. | Best inside Supabase. |
| Amazon Cognito | Teams on AWS | Low cost at scale within AWS. | A harder developer experience. |
| Keycloak | Self-hosted identity | Open source with enterprise features. | You run and maintain it. |
| Stytch | Passwordless and fraud prevention | Strong passwordless and device fraud tools. | A smaller ecosystem. |
| WorkOS | Selling to enterprises | Easy enterprise SSO and directory sync. | Focused on B2B needs. |
Which should you choose?
- You use Next.js: Clerk
- You must self-host: Keycloak
- You need enterprise SSO: WorkOS
Our editorial summary of each tool’s focus, written November 2026. Tools change quickly, so check the details on each site.
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Frequently asked questions
What are the best Auth0 alternatives?
Popular Auth0 alternatives include Clerk, Firebase Authentication and Supabase Auth. The best choice depends on whether you need a free plan, open-source software or specific features.
Is there a free alternative to Auth0?
Yes. Clerk, Firebase Authentication, Supabase Auth and Amazon Cognito are free or have free plans.
Is there an open-source alternative to Auth0?
Yes — Supabase Auth and Keycloak are open source.
Why do people look for Auth0 alternatives?
Developers look for Auth0 alternatives because pricing jumps as monthly active users grow.
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