The best open source alternative to Stytch is Hanko. If that doesn't suit you, we've compiled a ranked list of other open source Stytch alternatives to help you find a suitable replacement. Other interesting open source alternatives to Stytch are: Better Auth, Keycloak, Authentik, and SuperTokens.
Stytch alternatives are mainly Authentication & SSO Providers but may also be Authorization & Permissions Tools or Identity & Access Management (IAM) Tools. Browse these if you want a narrower list of alternatives or looking for a specific functionality of Stytch.
Streamline user authentication with passwordless login, enhancing security and user experience for your web applications.

Hanko is a cutting-edge authentication solution designed to revolutionize the way users access web applications. By embracing passwordless technology, Hanko offers a seamless and secure login experience that benefits both developers and end-users alike.
Key benefits of Hanko include:
Hanko empowers developers to create secure, user-friendly applications without the hassle of managing complex authentication systems. By leveraging modern web standards and best practices, Hanko paves the way for a passwordless future, making online interactions safer and more convenient for everyone.
Looking for open source alternatives to other popular services? Check out other posts in the alternatives series and openalternative.co, a directory of open source software with filters for tags and alternatives for easy browsing and discovery.
A comprehensive authentication framework offering email/password, social sign-on, two-factor auth, and multi-tenant support with full TypeScript integration.

Better Auth is a powerful authentication framework built specifically for TypeScript applications. It provides a complete suite of authentication features including email and password authentication, social sign-on with providers like GitHub and Google, two-factor authentication, and multi-tenant support with organization management.
The framework is designed to be framework-agnostic, supporting popular frameworks like React, Vue, Svelte, Next.js, Nuxt, and more. It offers a plugin ecosystem that allows you to extend functionality, and comes with built-in session management and access control capabilities.
Key benefits include:
Comprehensive open source identity management solution offering single sign-on, social login, and fine-grained authorization for applications and services.

Keycloak simplifies application security by providing a complete identity and access management solution. With built-in single sign-on (SSO), users authenticate once to access multiple applications, eliminating repetitive logins and logouts.
The platform offers robust identity features including:
Administrators benefit from a centralized console to manage users, configure authentication flows, and set security policies. Users get a self-service portal to manage their profiles, passwords, and linked accounts.
Enterprise-ready capabilities include high performance, clustering support for scalability, customizable themes, and extensive APIs for integration. As a Cloud Native Computing Foundation project, Keycloak maintains high standards for security, reliability, and community-driven development.
authentik is an open-source identity provider that offers self-hosted authentication, authorization, and user management for businesses of all sizes.

authentik is a powerful, open-source identity and access management solution designed to give organizations full control over their authentication and authorization needs. Here's why authentik stands out:
Self-hosted and Open Source:
Flexible and Customizable:
Enterprise-Grade Features:
Scalable and Easy to Deploy:
Comprehensive Identity Solution:
Cost-Effective:
authentik empowers organizations to prioritize security, simplify deployment, and automate identity workflows. Whether you're a small business or a large enterprise, authentik provides the tools and flexibility to meet your specific identity and access management needs.
Open-source authentication solution offering flexible, self-hosted user management with advanced features and easy integration.

SuperTokens is an open-source authentication solution that provides developers with a powerful, flexible, and secure way to implement user management in their applications. With SuperTokens, you can easily add robust authentication features to your web and mobile apps while maintaining full control over your user data.
Key benefits of SuperTokens include:
By choosing SuperTokens, you're not just getting an authentication solution; you're gaining a flexible, secure, and future-proof foundation for your user management needs. Whether you're building a small project or a large-scale application, SuperTokens provides the tools and flexibility to create a seamless authentication experience for your users.
Ory is a certified and battle-tested identity solution backed by a large open source community and trusted by Fortune 500 companies.

Ory provides a modern and modular approach to identity and access management (IAM) that scales, offers unmatched user experience and deployment flexibility, and only charges for what is used.
Key benefits of Ory include:
Ory allows you to build a unified identity system that meets all your needs, whether you're looking for authentication, authorization, user management, or a complete IAM platform. With options for self-hosting or using the managed Ory Network, you can get started quickly and scale seamlessly as your needs grow.
Looking for open source alternatives to other popular services? Check out other posts in the alternatives series and openalternative.co, a directory of open source software with filters for tags and alternatives for easy browsing and discovery.
An open-source identity solution offering customizable login experiences, multi-tenant support, and comprehensive user management.

Logto is a powerful, open-source identity platform designed to simplify authentication and user management for modern applications. With its robust features and flexible architecture, Logto enables developers to implement secure, seamless authentication flows while providing an exceptional user experience.
Key benefits of Logto include:
Whether you're building a small application or managing a complex ecosystem of services, Logto provides the tools and flexibility to create secure, user-friendly authentication experiences that scale with your business.
Stack Auth provides secure authentication, authorization, and user management for developers in just 5 minutes.

Stack Auth is the open-source alternative to Auth0, offering a comprehensive authentication and user management solution for developers. With Stack Auth, you can implement secure authentication, authorization, and user management features in your applications in just 5 minutes.
Key benefits of Stack Auth include:
Stack Auth provides a REST API and client/server SDKs for custom integrations. It also offers features like user impersonation for debugging and webhooks for syncing with other services.
With its open-source nature and developer-first approach, Stack Auth offers a powerful, flexible, and cost-effective solution for authentication and user management in your applications.
A managed authentication platform that helps developers implement secure user identity features like SSO, MFA, and social login without complex infrastructure.

Authgear is a comprehensive identity and access management (IAM) solution designed for modern applications. It provides enterprise-grade security features while maintaining a frictionless user experience.
Key benefits include:
The platform is particularly well-suited for businesses looking to implement secure authentication without the complexity of building and maintaining custom identity infrastructure.
Complete B2B authentication solution with SSO, role management, API security, and pre-built UI components. Ship enterprise-grade auth in just a few lines of code.

Complete B2B authentication platform that handles everything from user login to enterprise-grade security features. Build sophisticated user management systems without the complexity of developing auth infrastructure from scratch.
Key features include:
Developer-friendly implementation with SDKs for all major frameworks including Next.js, React, Flask, Express.js, and Go. The platform includes user impersonation for customer support, real-time webhooks, and role-based access control that can be implemented with just one line of code.
Perfect for B2B SaaS companies looking to add enterprise-ready authentication and user management without building complex auth infrastructure in-house.