SuperTokens
Open-source authentication for modern apps
About SuperTokens
SuperTokens is a Y-Combinator-backed open-source authentication platform that serves as an alternative to Auth0, Firebase Auth, and AWS Cognito. It provides email/password login, passwordless authentication, social OAuth 2.0, multi-factor authentication, session management, and role-based access control with full data ownership and no vendor lock-in.
Pros & Cons
Pros
- Fully open-source with self-hosted option, ensuring no vendor lock-in and complete data ownership
- Strong session security with built-in protection against XSS, CSRF, session fixation, and automatic theft detection
- Quick implementation — developers can integrate authentication in under a day using official SDKs
- Generous free tier with unlimited users on self-hosted and 5K MAUs on managed cloud
- Modular architecture lets you enable only the auth features you need and deeply customize UI and backend logic
- Transparent, predictable pricing with no surprise cost increases
Cons
- Self-hosted deployment requires more initial configuration and ongoing DevOps maintenance
- Smaller ecosystem and community compared to established players like Auth0 or Firebase Auth
- Documentation can be sparse for advanced customization scenarios and edge cases
- Limited pre-built UI components compared to some competitors, requiring more frontend work for custom flows
Key Features
Email & Password Authentication
Built-in email/password login with secure password hashing, account verification, and password reset flows
Passwordless Authentication
Support for magic link and OTP-based passwordless login via email or phone number
Social & OAuth 2.0 Login
Pre-built integrations with Google, GitHub, Apple, Facebook, and other OAuth 2.0 providers
Multi-Factor Authentication
Add TOTP-based MFA to any login flow for an extra layer of account security
Session Management
Advanced session handling with built-in protection against XSS, CSRF, and session fixation attacks, plus automatic session theft detection
Role-Based Access Control
Define roles and permissions to control what authenticated users can access across your application
User Management Dashboard
Admin dashboard for viewing, searching, and managing users, sessions, and metadata without writing custom tooling
Multi-Tenancy Support
Built-in multi-tenancy for B2B SaaS apps, allowing per-tenant authentication configurations and user isolation
Pricing
- Unlimited monthly active users
- All core authentication features
- Email/password & passwordless login
- Social OAuth 2.0 login
- Session management
- Community support
- Up to 5,000 monthly active users
- All core authentication features
- Managed infrastructure & updates
- On-demand scalability
- Email support
- Unlimited monthly active users
- All core + paid features
- Multi-factor authentication
- Multi-tenancy
- Role-based access control
- Priority support via Slack & email
- Volume discounts for 10K+ MAUs
- Dedicated support with 2-hour SLA
- Slack, MS Teams & video call support
- Custom deployment options
- SSO & advanced security features
Best For
SaaS Application Authentication
Add secure multi-tenant authentication to B2B SaaS products with per-tenant login configurations and user isolation
Privacy-First Self-Hosted Auth
Deploy authentication on your own infrastructure for full data sovereignty, ideal for regulated industries like healthcare or finance
Startup MVP Authentication
Get production-ready auth running quickly with free pricing, allowing startups to focus on core product development instead of building login systems
Migrating from Auth0 or Firebase
Replace expensive managed auth providers with an open-source alternative that offers comparable features at a fraction of the cost
Passwordless Login Implementation
Implement modern passwordless authentication via magic links or OTP for improved user experience and security
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