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Choosing an identity platform
Rankings, comparisons and pricing breakdowns of IAM and SSO tools, written by the team behind Casdoor and sourced from each vendor's own pages.
Top lists
Top lists
Top 10 Auth0 alternatives in 2026
Ten Auth0 alternatives compared on pricing model, free tier, open source and self-hosting: Casdoor, Clerk, WorkOS, Keycloak, FusionAuth, Logto, Zitadel and more.
Top lists
Top 10 open-source IAM and SSO solutions in 2026
Casdoor, Keycloak, authentik, Zitadel, Ory and five more open-source identity providers compared: licenses, protocols, languages and who each one fits.
Top lists
Top 5 managed identity providers with a dedicated instance and no per-user fees
Most auth SaaS bills per monthly active user on shared infrastructure. These five give you your own instance at a flat price: Casdoor Cloud, Skycloak, Phase Two, Cloud-IAM and FusionAuth.
Top lists
Top 5 Keycloak alternatives in 2026
Lighter, easier or managed alternatives to Keycloak: Casdoor, authentik, Zitadel, Ory and FusionAuth compared, plus where to get Keycloak hosted if you want to keep it.
Top lists
Top 5 OAuth authorization servers for MCP servers and AI agents
Which identity providers can secure remote MCP servers under the 2026 MCP authorization spec: WorkOS, Casdoor, Auth0, Descope and Keycloak compared.
Comparisons
Comparisons
Auth pricing compared: what 100,000 users cost in 2026
How Auth0, Clerk, WorkOS, Amazon Cognito, Supabase, Zitadel and Casdoor charge for authentication, with a worked example at 100,000 monthly active users.
Comparisons
Casdoor vs Keycloak vs authentik vs Zitadel: which open-source IdP?
A side-by-side comparison of the four most popular self-hostable identity providers: license, stack, protocols, authorization, multi-tenancy and managed hosting.
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