Listed alphabetically. A tool is ranked by its reviews once it has 3.
| Tool | Reviews | Lowest paid plan | Free plan | Free trial | Public API | Runs on | Main features |
|---|---|---|---|---|---|---|---|
 Auth0Authentication and authorization platform to secure users, AI agents and more | ReviewsNone yetWrite one for Auth0 | Lowest paid plan$35Essentials, as of October 19, 2026 | Free planYes | Free trialNot confirmed | Public APIYes | Runs onWeb, iOS, Android | Main features
|
 ClerkAuthentication and user management for React, Next.js, Remix and the modern web | ReviewsNone yetWrite one for Clerk | Lowest paid plan$25Pro, as of October 19, 2026 | Free planYes | Free trialNot confirmed | Public APIYes | Runs onWeb, iOS, Android | Main features
|
 DescopeIdentity journeys for customers and AI agents | ReviewsNone yetWrite one for Descope | Lowest paid plan$249per month, billed annually, plus usage overagesPro, as of October 20, 2026 | Free planYes | Free trialNot confirmed | Public APIYes | Runs onWeb | Main features
|
 FronteggA low-code CIAM platform for managing customer identity as you scale. | ReviewsNone yetWrite one for Frontegg | Lowest paid planSee plans | Free planYes | Free trialNot confirmed | Public APIYes | Runs onNot confirmed | Main features
|
 FusionAuthThe CIAM platform built to deploy anywhere, give you total control, and scale across any modern architecture | ReviewsNone yetWrite one for FusionAuth | Lowest paid plan$162per month at 1,000 MAUs, billed annuallyStarter, as of October 20, 2026 | Free planYes | Free trialNot confirmed | Public APIYes | Runs oniOS, Android, Docker, Kubernetes | Main features
|
 HankoOpen-source authentication and user management platform for modern apps | ReviewsNone yetWrite one for Hanko | Lowest paid plan$29per month, plus $0.01 per monthly active user over 10,000Pro, as of October 23, 2026 | Free planYes | Free trialNot confirmed | Public APIYes | Runs onWeb | Main features
|
 KindeDeveloper platform for authentication, access management and billing for SaaS products | ReviewsNone yetWrite one for Kinde | Lowest paid plan$25per month, plus usagePro, as of October 19, 2026 | Free planYes | Free trialNot confirmed | Public APIYes | Runs oniOS, Android | Main features
|
 LogtoModern auth infrastructure for developers | ReviewsNone yetWrite one for Logto | Lowest paid plan$24per month, plus usagePro, as of October 20, 2026 | Free planYes | Free trialNot confirmed | Public APIYes | Runs onWeb, Android | Main features
|
 OryIdentity security for the agentic era | ReviewsNone yetWrite one for Ory | Lowest paid plan$770per yearProduction, as of October 23, 2026 | Free planYes | Free trialNot confirmed | Public APIYes | Runs onCLI | Main features
|
| StytchAPIs and SDKs to integrate authentication and security into your app | ReviewsNone yetWrite one for Stytch | Lowest paid planSee plans | Free planYes | Free trialNot confirmed | Public APIYes | Runs onWeb | Main features
|
 SupabasePostgres development platform with auth, instant APIs, realtime, functions, storage and vectors | ReviewsNone yetWrite one for Supabase | Lowest paid plan$25per month, plus compute and usagePro, as of October 14, 2026 | Free planYes | Free trialNot confirmed | Public APINot confirmed | Runs onWeb, CLI | Main features
|
| SuperTokensOpen source user authentication: build fast, maintain control, with reasonable pricing. | ReviewsNone yetWrite one for SuperTokens | Lowest paid plan$0.02per MAU per monthCloud, as of October 28, 2026 | Free planYes | Free trialNot confirmed | Public APINot confirmed | Runs onAndroid, iOS, Flutter | Main features
|
 WorkOSAuthentication and enterprise-ready features as APIs and drop-in UI for developers | ReviewsNone yetWrite one for WorkOS | Lowest paid planNot confirmed | Free planYes | Free trialNot confirmed | Public APIYes | Runs onNot confirmed | Main features
|
| ZITADELZITADEL is the identity infrastructure platform built for developers and all users and applications. | ReviewsNone yetWrite one for ZITADEL | Lowest paid planUS$ 100per monthPro, as of October 28, 2026 | Free planYes | Free trialNot confirmed | Public APIYes | Runs onNot confirmed | Main features
|
From each tool's own website. “Not confirmed” means we couldn't confirm it there, not that the tool doesn't have it. Each tool's page says when its facts were checked.
How this list is made
A tool is listed here only when we've confirmed on its own website that it has a free plan. Tools we couldn't confirm it for are left out, even if they may have it. Vendors can't pay for a place on this list. Add a tool we missed