Best Self Hosted Alternatives to Tesseral

Kanidm is an identity management platform that centralizes users, groups, and authentication for your applications and infrastructure. It focuses on secure defaults, simple operations, and built-in capabilities so services can offload identity and access management to a single provider.

Key Features

• OAuth2/OIDC provider for single sign-on (SSO)
• WebAuthn passkeys support, including attested passkeys for higher assurance
• Application portal for launching and accessing linked applications
• Linux/Unix integration, including offline authentication support
• SSH public key distribution for Unix systems
• RADIUS support for network and VPN authentication
• Read-only LDAPS gateway for legacy LDAP-dependent systems
• Administration via CLI tooling plus Web UI for user self-service
• Two-node high availability using database replication

Use Cases

• Replace fragmented credentials with centralized SSO for internal web apps
• Provide strong phishing-resistant authentication using passkeys
• Manage Unix fleet access with centralized identities and SSH key delivery

Limitations and Considerations

• Administrative workflows are primarily CLI-driven, while the Web UI is focused on end-user self-service

Kanidm is a strong fit when you want a unified identity provider with modern authentication (passkeys) plus practical infrastructure integrations (Unix, SSH, RADIUS). It aims to deliver enterprise-grade capabilities with a streamlined operational model and secure-by-default design.

VoidAuth is an open-source authentication and user management service designed to sit in front of your self-hosted applications. It provides Single Sign-On via OpenID Connect and can also protect apps through a reverse-proxy ForwardAuth flow.

Key Features

• OpenID Connect (OIDC) identity provider for SSO integrations
• ForwardAuth-style proxy authentication for protecting apps behind a reverse proxy
• Built-in user and group management with an admin panel
• User invitations and optional self-registration
• Multi-factor authentication support, including passkeys (WebAuthn)
• Secure password reset via email verification
• Customization for branding and emails (logo, title, theme color, email templates)
• Encryption at rest with PostgreSQL or SQLite-backed storage

Use Cases

• Centralized login for a homelab or self-hosted app suite using OIDC
• Protecting internal dashboards and services via reverse-proxy ForwardAuth
• Lightweight IAM for small teams with groups and invitation-based onboarding

Limitations and Considerations

• The project notes it has not been security audited; evaluate risk and keep dependencies updated

VoidAuth fits users who want a modern, self-hosted SSO solution with both OIDC-based federation and reverse-proxy authentication, plus practical account management features. It is especially suited for homelabs and small organizations standardizing authentication across multiple services.

Melody Auth is a turnkey OAuth 2.0 and authentication system you can run on Cloudflare Workers (with D1 and KV) or self-host on Node.js with Redis and PostgreSQL. It provides a complete auth server, management UI, and developer-facing APIs and SDKs for integrating secure login flows into applications.

Key Features

• OAuth 2.0 flows including authorization, token exchange, refresh token revoke, scopes, consent, and user info retrieval
• OpenID Connect support (discovery/openid configuration) and JWT/JWKS-based authentication with key rotation
• Multi-factor authentication options including email/OTP/SMS, passkeys, recovery codes, and “remember device”
• External identity providers including social login (Google, GitHub, Discord, Apple, etc.) and OIDC providers; SAML SSO in Node.js deployments
• Role-based access control (RBAC), user attributes, account linking, organizations and groups
• Admin panel for managing users, apps, roles/scopes, organizations, IdPs, and logs (including impersonation)
• Server-to-server REST API plus embedded auth API and frontend SDKs for web, React, Angular, and Vue
• Brute-force protection and security-focused logging for sign-in and verification flows

Use Cases

• Ship OAuth/OIDC authentication for new products with a built-in admin console
• Add MFA, passkeys, and social login to existing apps without building auth from scratch
• Run an internal identity provider for multiple apps with RBAC, org/group management, and audit-friendly logs

Melody Auth is well-suited for teams that want a complete, customizable auth stack with minimal operational overhead on the edge or full control in a traditional server deployment.

FusionAuth is a full-featured authentication and identity platform for adding login, registration, and access control to web, mobile, and API-driven applications. It provides standards-based auth flows and an admin UI for managing users, applications, and security settings.

Key Features

• Standards-based authentication and authorization using OAuth 2.0 and OpenID Connect
• SAML v2 support for enterprise SSO integrations
• Multi-factor authentication (MFA) and passwordless authentication options
• User, group, and role management with application-specific configuration
• Admin dashboard and APIs for identity management and automation

Use Cases

• Centralized login and SSO across multiple internal and customer-facing applications
• Add OAuth/OIDC-based authentication for APIs and microservices
• Enterprise integrations requiring SAML-based identity federation

FusionAuth is a practical choice for teams needing a self-hosted IAM solution with modern auth standards, multiple authentication methods, and an administrative interface for ongoing identity operations.