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Best Keycloak alternatives in 2026

Looking for an alternative to Keycloak? Whether you've outgrown it, find the pricing steep, or just want to weigh your options, these are the strongest api development tools alternatives in 2026 - ranked on pricing, features, and who each one fits best. Keycloak itself has a free tier, so we've flagged where each option is cheaper, simpler, or more specialized.

  1. 1
    FusionAuth
    Best for: developers

    Self-hostable customer identity and access management A popular api tools alternative to Keycloak with a genuinely usable free tier - free. Particularly strong for developers.

  2. 2
    Auth0
    Best for: developers

    If Keycloak feels like overkill or over-budget, Auth0 is a leaner option with a genuinely usable free tier. Identity platform for authentication and authorization Pricing: free.

  3. 3
    Postman
    Best for: developers

    Postman goes head-to-head with Keycloak on features with a genuinely usable free tier. The collaborative platform for API development. Best suited to developers. Free - $14/user/mo.

  4. 4
    Doppler
    Best for: developers

    A well-rated api tools pick. SecretOps platform for teams. Doppler offers a free plan and starts at free - $8/seat/mo, making it a credible Keycloak replacement.

  5. 5
    Knock
    Best for: product-teams

    Notifications infrastructure. A popular api tools alternative to Keycloak with a genuinely usable free tier - free - $250/mo. Particularly strong for product-teams.

  6. 6
    Bruno
    Best for: developers

    If Keycloak feels like overkill or over-budget, Bruno is a leaner option with a genuinely usable free tier. Offline, open-source API client. Pricing: free - $9 once.

  7. 7
    Trigger.dev
    Best for: developers

    Trigger.dev goes head-to-head with Keycloak on features with a genuinely usable free tier. Background jobs for developers. Best suited to developers. Free - $50/mo.

  8. 8
    Inngest
    Best for: developers

    A well-rated api tools pick. Durable functions and events. Inngest offers a free plan and starts at free - $75/mo, making it a credible Keycloak replacement.

Still considering Keycloak itself? Read our Keycloak review →

Frequently asked questions

What is the best Keycloak alternative?

FusionAuth is our top-rated Keycloak alternative for 2026. Self-hostable customer identity and access management Free.

Is there a free Keycloak alternative?

Yes - FusionAuth, Auth0, Postman all offer a free tier you can start on without a credit card.

Why switch from Keycloak?

Common reasons are price, a simpler feature set, better fit for a specific use case, or platform support. Each tool above notes where it has an edge over Keycloak.