Best 12 Open Source Kinde Alternatives in 2026
Last Updated: October 26, 2025
Kinde is an all-in-one platform that handles authentication and user management for your applications. It lets you add secure login systems, manage user permissions, organize customers into groups, and track feature access all from one dashboard.
The platform supports different login methods like passwords, magic codes sent by email, social media accounts, and business single sign-on. It also includes tools for managing teams, setting up different user roles, and controlling which features each customer can access.
The best alternative to Kinde is 
Better Auth
Better AuthFree TypeScript Authentication. 
Auth.js
Auth.jsFree Open-Source Authentication Library and 
Stack Auth
Stack AuthOpen-Source Authentication Platform for Developers are also among the best options for User Authentication.
So, here are the 12 best alternatives to Kinde:
Better Auth is a framework-agnostic authentication library that runs directly in your application. It handles user accounts, login sessions, and security features without relying on external services. You keep full control of your user data because everything runs on your own database and server.
The framework provides ready-to-use authentication methods including email and password login, social sign-in with platforms like GitHub and Google, passkeys for passwordless access, and magic link login. It also supports advanced features like two-factor authentication, organization management for team accounts, and role-based access control.
Unlike paid authentication services, Better Auth is completely free with no user limits or hidden costs. It uses modern security practices and actively maintained code to keep your applications safe.
Auth.js is a complete authentication solution that works across different JavaScript frameworks. It provides everything needed to add secure login systems to websites and applications. You can let users sign in through their existing accounts on services like Google or GitHub, or you can use email-based magic links, or even traditional username and password combinations.
The library is runtime agnostic, meaning it adapts to work with Next.js, SvelteKit, Express, Qwik, and other frameworks. It handles session management, protects routes, and connects to databases when needed. Auth.js follows web standards and security best practices, making it both safe and reliable. Since it is open source, the code is publicly available for review and contributions from developers worldwide.
Stack Auth is a complete authentication solution that handles all the complex parts of user login and management. When you add it to your application, you get ready-made login pages, account settings, password reset flows, and user dashboards without writing code for these features yourself.
The platform supports multiple ways for users to sign in, including regular passwords, social logins through Google or GitHub, magic email links, and modern passkeys using fingerprints or face recognition. It also handles advanced features like two-factor authentication for extra security, team management for business apps, and permission systems to control what different users can do.
Stack Auth is fully open-source and licensed under MIT and AGPL, meaning you can see exactly how it works and modify it if needed.
Logto is an authentication and identity management platform that handles user sign-in, permissions, and security for your applications. You can use it as a cloud service or install it on your own servers since it's open-source.
The platform supports multiple ways for users to sign in: traditional passwords, email codes, phone verification, social media accounts like Google and Facebook, or enterprise systems through Single Sign-On. It also includes advanced features like multi-factor authentication for extra security and role-based access control to manage what different users can do.
Logto works with over 30 programming languages and frameworks including React, Next.js, Vue, Python, and Go. It's trusted by companies worldwide and meets strict security standards with SOC 2 Type II certification.
SuperTokens is an authentication framework that handles user login, registration, and session management for your applications. It provides ready-made solutions for email password login, social login through providers like Google and Facebook, passwordless authentication using magic links or one-time codes, and more.
The tool uses a unique design where your backend sits between your frontend and SuperTokens. This gives you more control to customize the authentication process while keeping it secure. SuperTokens manages the complex security tasks automatically, including protecting against common attacks and handling session tokens.
You can choose to run SuperTokens on your own servers completely free, or use their managed cloud service that handles all the technical work for you.
Hanko is a complete authentication platform that handles user login and account management for web and mobile apps. Instead of building login systems from scratch, developers can add Hanko in minutes using ready-made components.
The platform supports multiple ways to log in: passkeys for password-free access, traditional passwords, email codes, and social login through Google or GitHub. It also includes two-factor authentication and enterprise single sign-on. Everything is built on open-source code, meaning you can see exactly how it works and modify it if needed.
Hanko offers both a free cloud-hosted version and a professional version with more features. You can also download and run it on your own servers for complete data control.
Authentik is a tool that manages how users sign in to your applications and services. Think of it as a central security checkpoint that verifies who someone is before letting them access your systems.
It supports multiple authentication methods, from simple passwords to advanced options like security keys and fingerprints. Authentik can connect to social login providers like Google or GitHub, or it can manage its own user database. The platform uses industry-standard protocols, which means it works with thousands of applications without custom coding.
Authentik is open source, meaning anyone can review its code for security issues. You can install it using Docker or Kubernetes, making it suitable for any size organization. There are free and paid versions available, depending on your needs.
Tesseral is a complete authentication system designed for business-to-business software applications. It handles user login, permission management, and security features so developers can focus on building their main product.
The platform supports multiple ways for users to log in, including passwords, magic links, Google, GitHub, and Microsoft accounts. For larger companies, it includes enterprise features like SAML and OIDC single sign-on, which lets employees use their work accounts.
Tesseral is open-source with an MIT license, meaning anyone can view, modify, and use the code. You can choose between using their managed cloud service or running Tesseral on your own servers. The platform works with popular frameworks like React, Next.js, Python, and Node.js through ready-made code packages.
Ory is a complete identity management system that handles user authentication and access control for web and mobile applications. It combines several specialized tools that work together to protect your application and manage who can access what.
The platform includes components for user login and registration, OAuth and social sign-in connections, permission management, and API security. Unlike closed systems where you cannot see how things work, Ory is open source, meaning the code is public and can be reviewed by anyone. This makes it more trustworthy and secure.
You can choose to use Ory Network, which is the hosted cloud version that Ory manages for you, or download the open-source version and run it on your own infrastructure. Both options give you strong security and the ability to customize everything to match your needs.
Pomerium is a zero trust access proxy that sits between users and internal applications. It verifies identity and permission before allowing access to any resource. The tool works by connecting to your existing identity provider like Google, Okta, Azure, or others.
When someone tries to access an application, Pomerium checks their identity, device status, and other factors against your security rules. Only if everything matches will it grant access. This happens in real time for every request, not just once during login.
Pomerium is open source and can be self-hosted, meaning your data stays under your control. It offers both free and paid versions, with the paid options adding team features and support for larger organizations.