Open Source Clerk Alternatives

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:

• Enhanced Security: Eliminate password-related vulnerabilities and reduce the risk of account breaches.
• Improved User Experience: Provide a frictionless login process, increasing user satisfaction and retention.
• Easy Integration: Implement Hanko quickly with pre-built components and comprehensive documentation.
• Customization Options: Tailor the authentication flow to match your brand and application requirements.
• Multi-factor Authentication: Strengthen security with additional factors like biometrics or security keys.
• GDPR Compliance: Ensure user data privacy with built-in compliance features.
• Open Source Transparency: Benefit from community-driven development and security audits.

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.

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:

• Type-safe API with full TypeScript support
• Auto-generated database schemas for users and sessions
• Simple integration with just a few lines of code
• Flexible deployment options with your own infrastructure
• Enterprise-ready with multi-tenant and team features

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:

1. Self-hosted and Open Source:

   • Deploy anywhere, maintaining complete control over your sensitive data
   • Continuously reviewed by community experts, ensuring transparency and security

2. Flexible and Customizable:

   • Pre-built workflows for quick setup
   • Fully customizable authentication steps through configurable templates
   • Comprehensive APIs for advanced automation

3. Enterprise-Grade Features:

   • Multi-factor authentication (MFA)
   • Conditional access
   • Application proxy
   • Support for multiple protocols (SAML2, OAuth2, OIDC, SCIM, LDAP, RADIUS)

4. Scalable and Easy to Deploy:

   • Supports Kubernetes, Terraform, and Docker Compose
   • Designed for both B2B and B2C use cases

5. Comprehensive Identity Solution:

   • Authentication
   • User enrollment
   • Self-service capabilities

6. Cost-Effective:

   • Streamlined pricing with no hidden costs
   • Core functionality included without extra charges

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.

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:

• Self-hosted: Keep your user data on your own servers, ensuring complete data ownership and privacy compliance.
• Customizable: Tailor the authentication flow and UI to match your brand and specific requirements.
• Multi-tenancy support: Easily manage multiple apps or organizations within a single instance.
• Comprehensive features: Includes session management, social logins, passwordless auth, and more out of the box.
• Language agnostic: Supports various backend languages and frameworks, making it versatile for different tech stacks.
• Active community: Benefit from continuous improvements, updates, and support from a growing open-source community.
• Easy integration: Well-documented SDKs and APIs make implementation straightforward for developers.
• Scalable: Designed to handle high traffic and grow with your application's needs.

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.

ZITADEL is an all-in-one identity suite designed to streamline application development with robust authentication and authorization capabilities.

Key features:

• Customizable hosted login: Easily authenticate users with a branded, customizable login page
• Modern authentication methods: Support for SSO, social logins, and multi-factor authentication
• Role-based access control: Assign permissions based on user roles for granular authorization
• Multi-tenant architecture: Built-in support for B2B scenarios with organization management
• Extensibility: Customize workflows and integrate ZITADEL into existing systems with Actions
• Developer-friendly: Modern APIs (gRPC and REST) with comprehensive documentation
• Flexible deployment: Run ZITADEL as a managed service or self-host for full control

ZITADEL empowers developers to offload complex identity tasks while maintaining adaptability. With security defaults and custom code extensions, it provides a solid foundation for building scalable applications with sophisticated user management.

Whether you need authentication for a small project or enterprise-grade identity infrastructure, ZITADEL offers the flexibility to grow with your needs. Focus on building your core product features while ZITADEL handles the intricacies of identity management.

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:

• Uninterrupted performance even under demanding conditions, ensuring no revenue loss during peak demand
• Comprehensive visibility and fully configurable options to balance user experience, privacy and security
• Unmatched flexibility for customization beyond just branding, including UI, workflows, standards, deployment, scale and security
• Integrations and SDKs for all modern and legacy frameworks
• Migration guides to easily move from home-grown or other IAM solutions
• Trusted by over 30,000 companies, from startups to Fortune 500 enterprises
• Available as open source, self-hosted, or fully managed cloud offering

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.

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:

• Customizable login experiences: Tailor the authentication process to match your brand and user preferences, creating a cohesive and engaging login flow.
• Multi-tenant support: Easily manage multiple applications and organizations within a single Logto instance, streamlining your identity infrastructure.
• Comprehensive user management: Gain full control over user data, roles, and permissions with intuitive tools for efficient user administration.
• Enterprise-grade security: Implement industry-standard security protocols and best practices to protect user identities and sensitive information.
• Extensible architecture: Integrate Logto seamlessly with your existing tech stack and extend its functionality through a wide range of connectors and APIs.
• Open-source advantage: Benefit from community-driven development, transparency, and the ability to customize the solution to your specific needs.

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 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:

• Quick setup: Get started with authentication in your Next.js project using the setup wizard.
• Beautiful integration: Enjoy lean and responsive design with pre-styled components that developers and users will love.
• Flexible implementation: Choose between headless or headful UI options to fit your project needs.
• Advanced features: Benefit from password authentication, SSO, 2FA, organizations & teams, permissions & RBAC, and more.
• Developer-friendly: Built for developers, Stack Auth is simple to understand, use, and integrate into your tech stack.
• Open-source and self-hostable: Maintain full control over your authentication infrastructure.

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.

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:

• Flexible Authentication Options: Support for multiple login methods including passwordless, biometrics, and social logins
• Developer-Friendly Integration: Low-code implementation with SDKs and APIs for quick deployment
• Enhanced Security: Built-in features like MFA, fraud detection, and compliance with security standards
• Scalable Infrastructure: High availability architecture that grows with your business
• Regional Support: Dedicated support focused on Asian markets with local expertise

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 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:

• Pre-built login UI that matches your brand styling and supports multiple authentication methods
• Enterprise SSO integration with SAML and SCIM provisioning for major identity providers like Microsoft Entra and Okta
• Fine-grained authorization with custom roles and permissions management for your customers
• Managed API keys with custom scopes and revocation capabilities
• Advanced security features including passkeys, TOTP authenticator apps, and phishing-resistant MFA

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.