Best Auth & identity
The top 20 products in Auth & identity that have a free tier and have an API, out of 28 in the category. Listed in ranking order and compared on pricing, free tier, API, MCP server, SDK and open source. 20 of 20 have a free tier, 20 of 20 have an API, 9 of 20 offer an MCP server, 4 of 20 are open source.
- Clerk
Authentication and user management for applications
- ZITADEL
Identity infrastructure, simplified
- WorkOS
Enterprise authentication and identity platform for SaaS companies
- SuperTokens
Open source user authentication
- Stytch
APIs and SDKs to integrate authentication and security into your app.
- Permit.io
Runtime Access Control for the AI Era
- Ory
Identity and access management (IAM) for applications, enterprises, and AI agents. Cloud-native, API-first, and self-hostable.
- Okta
Authentication and user management platform for workforce and customer identities.
- MojoAuth
Passwordless authentication API for consumer apps, load tested at 25,000 logins per second
- Logto
Modern auth infrastructure for developers
- LoginTC
Multi-factor authentication platform adding 2FA to VPNs, Windows logon, RDP, Office 365, and 40+ applications
- Kinde
Auth, billing and access management for modern SaaS products
- Cisco Duo
IAM & MFA identity security for business, humans, and AI
- Descope
Customer and agentic identity platform for authentication, access control, and identity management
- Cloud-IAM
Fully managed Keycloak with up to 99.98% SLA, ISO 27001 certification and 24/7 expert support, hosted in Europe.
- Cerbos Hub
Control plane for Cerbos PDPs with centralized policy authoring, testing, distribution, and audit log aggregation.
- Authress
Login and access control API
- Auth0
Secure AI Agent & User Authentication
- Protectimus
Two-factor authentication platform available as a cloud MFA service and on-premises, based on OATH standards.
- LoginLlama
Login fraud & account takeover detection API
Side by side
| # | Product | Pricing | Free tier | API | MCP server | SDK | Open source |
|---|---|---|---|---|---|---|---|
| 1 | Clerk | Freemium | yes | yes | yes | yes | no |
| 2 | ZITADEL | Freemium · from US$ 0 | yes | yes | no | yes | yes |
| 3 | WorkOS | Freemium | yes | yes | yes | yes | no |
| 4 | SuperTokens | Freemium | yes | yes | no | yes | yes |
| 5 | Stytch | Freemium · from $0/month | yes | yes | yes | yes | no |
| 6 | Permit.io | Freemium | yes | yes | yes | yes | no |
| 7 | Ory | Freemium | yes | yes | yes | yes | yes |
| 8 | Okta | Freemium · from 6 | yes | yes | yes | yes | no |
| 9 | MojoAuth | Freemium · from $150/month (Business Pro) | yes | yes | no | yes | no |
| 10 | Logto | Freemium · from $24/mo | yes | yes | no | yes | yes |
| 11 | LoginTC | Freemium · from $3 per user/month | yes | yes | no | yes | no |
| 12 | Kinde | Freemium | yes | yes | no | yes | no |
| 13 | Cisco Duo | Freemium | yes | yes | no | yes | no |
| 14 | Descope | Freemium | yes | yes | yes | yes | no |
| 15 | Cloud-IAM | Freemium · from 225 EUR/month (Starter); free tier available | yes | yes | no | — | no |
| 16 | Cerbos Hub | Freemium | yes | yes | no | yes | no |
| 17 | Authress | Usage-based | yes | yes | no | yes | no |
| 18 | Auth0 | Freemium | yes | yes | yes | yes | no |
| 19 | Protectimus | Freemium | yes | yes | no | yes | no |
| 20 | LoginLlama | Freemium · from $19/month | yes | yes | yes | yes | — |
Ranked by verification, completeness, extraction confidence and method (AI model or heuristic fallback), and API/MCP support; ties go to the newest listing. Paid plans aren't an input to the ranking. Facts come from each product's own website, or from its verified owner when they have edited the listing. Each product page shows when it was last verified and how it was extracted.
All 28 products in Auth & identity →
API
curl 'https://toolgrep.com/api/products?category=auth&has_free_tier=1&has_api=1'