View all Identity Mgmt Alternatives
Best Free Alternatives to Okta
Stop paying $2 - $6/user/mo. Discover professional-grade tools that won't break your budget.
Category: Identity MgmtVerified for 2025
Top Recommended Replacements
Keycloak
Best Overall Open Source Alternative
Why we like it
The 'Gold Standard' of free IAM; fully compliant with OIDC, SAML, and OAuth 2.0; supports user federation (LDAP/AD); 100% free with no user limits if self-hosted.
Keep in mind
Java-based and resource-heavy; the learning curve for configuration and custom theming is steep compared to Okta.
Authentik
Best Modern UI/UX
Why we like it
A modern, lightweight alternative to Keycloak; highly flexible 'Flows' engine allows you to build custom login pipelines visually; integrates seamlessly with Kubernetes.
Keep in mind
Newer project than Keycloak; the ecosystem of third-party plugins is smaller.
ZITADEL
FREEBest for B2B Multitenancy
Why we like it
Built for B2B SaaS from day one; allows infinite organizations and custom branding per customer; free tier includes 25,000 requests; written in Go for high performance.
Keep in mind
Self-hosting requires more complex CockroachDB/Postgres setup; the 'Audit Trail' retention is limited on the free cloud tier.
Logto
FREEBest for Developers
Why we like it
Designed to be set up in minutes; excellent documentation and SDKs for React, Vue, and Mobile; offers a 'Dev' tier for free; simplifies OIDC for non-security experts.
Keep in mind
Lacks the deep legacy enterprise features (like complex SAML federation chains) found in Keycloak.
Authelia
Best for Home Labs
Why we like it
Extremely lightweight; works perfectly with reverse proxies (Traefik/Nginx) to protect internal dashboards; supports 2FA (Duo/TOTP/YubiKey) out of the box.
Keep in mind
Not a full-featured IdP for external customer apps; focuses primarily on protecting internal resources.
SuperTokens
Best for App Authentication
Why we like it
Open-source alternative to Auth0/Okta specifically for app login; innovative 'Session' management prevents token theft; highly customizable UI via React components.
Keep in mind
Requires embedding their SDK deeply into your frontend/backend; less 'standard' than a generic OIDC provider.
FusionAuth (Community)
FREEBest for Scale
Why we like it
Free 'Community' edition is fully featured with unlimited users; runs on any server; famous for being able to handle millions of users on modest hardware.
Keep in mind
Advanced features like 'Breached Password Detection' and some MFA gateways require a paid license.
Ory (Kratos/Hydra)
Best Headless/API-First
Why we like it
Highly modular; 'Hydra' handles OAuth2 while 'Kratos' handles Identity; perfect for companies building a completely custom login experience from scratch.
Keep in mind
Extremely high complexity; you must build your own UI (it's headless); strictly for engineering teams.
Casdoor
Best UI-First Platform
Why we like it
Written in Go; features a beautiful built-in UI that supports login via WeChat, QQ, Google, and GitHub out of the box; supports high-concurrency architectures.
Keep in mind
Documentation can be inconsistent (translation issues); community support is growing but smaller than Keycloak.
Gluu Server
Best for High Security
Why we like it
Designed for banking and government use; supports FAPI (Financial-grade API) security profiles; extremely robust SAML and OIDC support.
Keep in mind
Very heavy installation; the interface is strictly utilitarian; requires significant expertise to manage.
Clerk
FREEBest for Next.js
Why we like it
The fastest way to add auth to a Next.js/React app; free tier includes 10,000 monthly active users; beautiful pre-built components.
Keep in mind
Proprietary (not open source); B2B features like SAML SSO are expensive add-ons.
Kanidm
Best Rust-Based Alternative
Why we like it
A modern, memory-safe IDM written in Rust; designed to be a faster, simpler alternative to LDAP and Keycloak; gaining traction in the Linux community.
Keep in mind
Still in active early development; web UI is functional but basic compared to commercial tools.
Need more options?
Explore our full directory of Identity Mgmt software alternatives.
Browse the Identity Mgmt Hub