Identity · OAuth2 / OIDC

One central identity.
Your whole team and stack.

A clear console, standardized tokens, browser SDK, and Bridge mode — without migrating passwords.

Try for free View documentation

No credit card required to get started

console.auth21.io

My organization

OAuth application management

JD
ML
AS
Application Status
Main web app
app.exemplo.com
 Active
Internal ERP
erp.empresa.local
 Active

Trusted by teams shipping to production

TechFlow
DataSync
CloudBase
SecureApp
DevStack
APIHub

Rollout

Get started in 3 simple steps

Three steps to set up Auth21 and get your team running.

Create organization
Step 1

Create your organization

Sign up and configure your organization with redirect URIs and mode.

Add OAuth app
Active
Bridge
Step 2

Configure your apps

Create OAuth apps with a client ID and choose Hosted or Bridge mode.

Integrate in code
// Redirect to login
const url = `/authorize`
// Exchange code for token
const token = await getToken()
Step 3

Integrate and launch

Use standard OAuth2 endpoints. JWT tokens ready to use.

Trust

Why teams love Auth21

Feedback from teams that simplified authentication with Auth21.

"Auth21 replaced three different login systems we had. Now we use one centralized identity."

RC
Ricardo Costa
CTO, TechFlow

"Bridge mode was perfect. We didn’t need to migrate ERP passwords and we have full OAuth2."

ML
Maria Lopes
Lead Developer, DataSync

"OIDC integration made communication between our microservices much easier. Set up in under an hour."

AS
Andre Silva
Arquiteto, CloudBase

"Productivity went up because we finally have SSO that works. Sign in once, access everything."

JF
Joana Ferreira
Product Manager, SecureApp

"Finally a solution that doesn’t force us to rewrite authentication. It fits what we already have."

PC
Pedro Carvalho
Founder, DevStack

"The admin console is intuitive. App management and audit without digging through docs."

SM
Sara Martins
DevOps, APIHub

Product

Everything for modern authentication

What you need to implement OAuth2/OIDC securely.

Hosted mode
Managed login UI
Accounts on Auth21

Hosted mode

Managed accounts and login screen. Ideal for new projects.

Bridge mode
Keep your own login
HMAC signature

Bridge mode

Your system stays the source of truth for identity. Auth21 issues tokens.

Native PKCE
code_challenge=SHA256(verifier)

PKCE for SPAs

PKCE support for browser apps without a secure backend for secrets.

Admin console
+5

Team management

Invite members, manage permissions, and monitor in real time.

Audit logs

Full audit trail

Logins, authorizations, and security events in one place.

OIDC standards
100%

100% compatible

OAuth 2.0, OpenID Connect, JWT, PKCE. Standards that work.

Pricing

Choose the right plan

Flexible options for every stage of your project.

Save 20% with annual billing

Starter

$10 /mo

For personal projects or testing.

Get started →
Includes
  • 1 organization
  • Up to 5 OAuth apps
  • 1,000 MAU
  • Hosted mode
  • Community support
Most popular

Pro

$25 /mo

For growing teams.

Upgrade to Pro →
Everything in Starter, plus
  • Unlimited organizations
  • 50 OAuth apps
  • 50,000 MAU
  • Bridge + Hosted
  • Priority support
  • Audit logs

Enterprise

$40 /mo

For large organizations.

Upgrade to Enterprise →
Everything in Pro, plus
  • Unlimited OAuth apps
  • Unlimited MAU
  • 99.99% SLA
  • Custom branding
  • Dedicated support

Support

Frequently asked questions

Answers to common questions before you get started.

Didn’t find what you need? View documentation

Stack

Works with your tools

Integrate Auth21 with the languages and frameworks you already use.

Next.js
React
Vue.js
PHP
Python
Node.js

Ready to simplify your app’s authentication?

Start today and see how Auth21 can speed up development.

Start for free