Keycloak Alternatives
Evaluating Auth0, Okta, WorkOS, or another commercial IAM? Keycloak is the open-source alternative that matches them on standards and features — without per-user licensing or vendor lock-in. Paired with Phase Two managed hosting, you get that control with fixed, predictable costs and none of the operational burden.
On the core standards — OIDC, OAuth 2.0, and SAML — Keycloak offers parity with virtually every commercial IAM platform. The real differences are cost model, deployment flexibility, and how far you can extend the system.
Keycloak vs. commercial IAM at a glance
A high-level view of how each platform is licensed and deployed. Follow any row for the full, feature-by-feature comparison.
| Platform | Pricing model | Deployment | On-premise | Best known for | Compare |
|---|---|---|---|---|---|
| Keycloak (with Phase Two) | Fixed hosting cost, not per-user | Self-hosted, your cloud, on-prem, or managed | Yes | Open-source, extensible IAM | Managed hosting → |
| Auth0 | Per-MAU + feature tiers; cost climbs with users and add-ons | Cloud SaaS only | No | Developer-friendly managed auth | Keycloak vs. Auth0 → |
| Okta | Per-user, per-feature; enterprise bands add up | Cloud SaaS only | No | Enterprise workforce identity | Keycloak vs. Okta → |
| WorkOS | Per-connection / per-org enterprise SSO | Cloud SaaS only | No | Enterprise-ready SSO/SCIM for SaaS | Keycloak vs. WorkOS → |
| Ping Identity | Enterprise contracts; quote-based | Cloud + self-managed options | Yes | Large-enterprise IAM suites | Keycloak vs. Ping Identity → |
| FrontEgg | Per-MAU tiers; B2B feature gating | Cloud SaaS only | No | Embedded B2B user management | Keycloak vs. FrontEgg → |
| OneLogin | Per-user, per-module | Cloud SaaS only | No | Workforce SSO & access management | Keycloak vs. OneLogin → |
Pricing models are summarized for orientation and reflect each vendor's general approach, not a quote. Commercial pricing changes frequently — confirm current rates with each vendor.
Pick a head-to-head comparison
vs Auth0
Open-source alternative to Auth0 — without per-MAU pricing.
Comparevs Okta
Open-source alternative to Okta — for cost and deployment control.
Comparevs WorkOS
Open-source alternative to WorkOS — no per-connection toll.
Comparevs Ping Identity
Open-source alternative to Ping — without the suite contract.
Comparevs FrontEgg
Open-source alternative to FrontEgg — B2B without per-MAU cost.
Comparevs OneLogin
Open-source alternative to OneLogin — no per-module pricing.
CompareOpen-Source IAM
The roundup — why open standards beat vendor lock-in.
ReadManaged Hosting
Run Keycloak with Phase Two — fixed cost, zero ops burden.
Learn moreAlready on Auth0, Okta, or WorkOS?
Moving to Keycloak is more approachable than most teams expect. We import users, broker authentication during a phased cutover, and move you off your current vendor without disrupting access.
See how we migrate teams to KeycloakFrequently asked questions
What is the best open-source alternative to Auth0?
Keycloak is the most widely adopted open-source alternative to Auth0. It supports the same core standards (OAuth 2.0, OpenID Connect, SAML) and matches Auth0 on most authentication and authorization features, while being free of per-user licensing. The main trade-off is operational overhead, which a managed host like Phase Two removes. See our full Keycloak vs. Auth0 comparison.
What is the best alternative to Okta?
For teams that want control over deployment and cost, Keycloak is a strong Okta alternative — especially where on-premise or data-residency requirements rule out a cloud-only vendor. Read Keycloak vs. Okta for a feature-by-feature look.
Is Keycloak cheaper than Auth0?
For most growing applications, yes. Commercial IAM pricing scales with monthly active users and feature tiers, while Keycloak's cost is driven by hosting infrastructure and stays largely fixed as your user base grows. Teams moving to managed Keycloak frequently see substantial savings. Estimate it on our hosting pricing page.
Can I migrate off Auth0, Okta, or WorkOS to Keycloak?
Yes. Keycloak can import your users and broker authentication to your existing provider during a phased cutover, so you can migrate incrementally without disrupting users. We've built tooling and a process for exactly this — see Migrate to Keycloak.
Is Keycloak a good alternative to commercial IAM?
Keycloak offers feature parity with virtually every commercial IAM platform on the core standards, plus full source access and on-premise deployment options that SaaS-only vendors can't match. Paired with managed hosting, you get that openness without the operational burden. Read the open-source IAM overview.