2 editor-verified alternatives · Clerk overview →
source: tools.alternatives · stored order · active records only; review scores are annotations and never change membership or order
Logto is an open-source authentication and authorization platform built on OIDC and OAuth 2.1, serving as an alternative to Auth0, Cognito, and Firebase Auth. It provides pre-built sign-in flows with customizable UI, social login, Google One Tap, MFA, enterprise SSO via SAML, and role-based access control. SDKs cover 30+ frameworks including React, Next.js, Vue, Flutter, Go, and Python, with multi-tenancy support for SaaS applications.
Casdoor is an open-source Identity and Access Management platform built by the Casbin community in Go and React. Supports OAuth 2.0, OIDC, SAML, CAS, LDAP, SCIM, WebAuthn, and MFA with a comprehensive web-based admin UI. Provides multi-tenant organization management, flexible RBAC and ABAC access control via Casbin models, and integrations with Google Workspace and Azure AD. Offers self-hosted deployment with optional managed cloud plans.
Logto, Casdoor — see all open-source developer tools.
Logto tops our editor-verified list of 2 Clerk alternatives.
Yes — Logto, Casdoor are open source.
Yes — Logto, Casdoor offer a free plan or free tier.