Keycloak
96 · HealthyIdentity and access management server with SSO, OIDC, SAML and user federation (CNCF).
Open source Auth & identity
authentik
91 · HealthyIdentity provider with flows, SSO across OIDC, SAML, LDAP and a proxy outpost.
Logto
86 · HealthyAuth and identity service for SaaS and AI apps, built on OIDC with organizations and RBAC.
ZITADEL
84 · HealthyMulti-tenant identity platform with event-sourced audit trail and B2B organizations.
Hanko
84 · HealthyAuthentication server with passkeys, passwords, social login and drop-in web components.
Better Auth
83 · HealthyTypeScript authentication framework with email and social login, passkeys, two-factor, organizations and SSO plugins.
Ory Kratos
78 · StableHeadless identity and user-management server with an API-first design.
Pocket ID
78 · StableLightweight OpenID Connect provider that signs users in to your apps with passkeys only.
SuperTokens
74 · StableAuthentication backend with prebuilt UI, sessions and multi-tenancy.
Authelia
71 · StableSingle sign-on and two-factor portal that sits in front of web apps via a reverse proxy.
ZITADEL
Multi-tenant identity platform with event-sourced audit trail and B2B organizations.
Alternative to
Will it still be around?
Healthy
Score 84/100
Can a business use it freely?
Free, share hosted changes
AGPL-3.0 · open source (copyleft) · relicensed stricter in 2025
Features compared
has,doesn't3 features
12/12 Auth0 features free in ZITADEL
ZITADEL has every feature Auth0 has on this list.
✕ doesn't have it · ◐ partly · $ higher plan or paid editionBoth have 9
Headline Auth0 features on the B2C Essentials plan, and whether ZITADEL has each in its free, self-hosted edition.
| Feature | Auth0B2C Essentials plan | ZITADEL12 of 12 free |
|---|---|---|
| ZITADEL has, Auth0 doesn't3 | ||
| Enterprise SSO for your customers | Higher planSAML and OIDC connections, Professional | YesSAML and OIDC per organization |
| Machine-to-machine tokens | Higher planAdd-on | YesService users |
| Audit logs | Limited5 days of logs | YesEvent-sourced audit trail |
| Both have9 | ||
| Hosted login pages | IncludedUniversal Login | Yes |
| Social login | Included | Yes |
| Multi-factor authentication | Included | Yes |
| Passkeys and passwordless | Included | Yes |
| Organizations (B2B tenants) | Included10 organizations | YesBuilt for multi-tenant B2B |
| Roles and permissions | Included | Yes |
| Custom code in login flows | IncludedActions | YesActions |
| User management console | Included | Yes |
| OAuth 2.0 and OIDC provider | Included | YesOIDC and SAML |
Sources
- Auth0, checked 2026-10-09: auth0.com
- ZITADEL, checked 2026-10-09: zitadel.com, github.com
Flat Rate Deploy
At 500 monthly active users, Auth0 (about $35 a month) is the cheaper choice. Switching to ZITADEL on OpenTools saves money from 1,000 monthly active users.
Monthly cost
- ZITADEL on OpenTools
- $39
- Auth0
$35
You save each month
−$4/mo
-11% less than today
Saving from month one
You save
- Over 3 years
- −$144
- In year one
- −$48
List price checked 8 Oct 2026 · Source · Disclaimer
Health score: 84/100
Healthy · activity, bus factor and issue responsiveness, from GitHub
Score v2 · How it works
Activity
45% weight100/100
- Last commit 3 days ago (100/100).
- 641 commits in the past 12 months (100/100).
- 50+ releases in the past 12 months (100/100).
Bus factor
30% weight100/100
- Top contributor wrote 21% of the last 97 commits (past 12 months).
- 19 people authored those commits.
Responsiveness
25% weight35/100
- 74% of all issues are closed (991 open, 2837 closed) (74/100).
- 3 of 30 recent issues got a reply or were closed (10/100).
License
Free, share hosted changes
AGPL-3.0 · Open source (copyleft)Relicensed 2025
What you need to do
Free for any use, commercial included. If you change the code and people outside your company use it over the network, you must publish your changes under the same license.
GNU Affero General Public License v3.0 · Open source (copyleft). OSI-approved license that requires sharing changes under the same license when you distribute (AGPL: also when you offer it over a network).
Detected by GitHub as AGPL-3.0.
License history
- Apache-2.0 → AGPL-3.0 · Moved to AGPL with ZITADEL v3. · commit
GitHub activity
- Stars
- 15k
- Forks
- 1.4k
- Commits, 12 mo
- 641
- last 3 days ago
- Releases, 12 mo
- 50+
- last 8 days ago
- Contributors
- 250
- 19 in last 97 commits
- Open issues
- 991
- 2.8k closed
Snapshot from 2026-10-08
Top contributors
Points for pull requests merged into ZITADEL and reviews of them since 10 October 2025. Building something another user asked for earns more. 69 people have points on ZITADEL in all.
