Auth0 takes a modern approach to Identity and enables organizations to provide secure access to any application, for any user. Auth0 is highly customizable, and simple yet flexible. Safeguarding billions of login transactions each month, Auth0 delivers convenience, privacy, and security so customers can focus on innovation.
With Auth0, you can rapidly integrate authentication and authorization for web, mobile, and legacy applications, with new Fine Grained Authorization (FGA) that goes beyond role-based access control.
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FusionAuth is the authentication and authorization platform engineered for developers who demand flexibility and control. Built from the ground up to integrate with any stack, every feature — from user registration to MFA and SSO — is exposed via a modern, well-documented API.
Support for every major identity protocol is included out of the box: OIDC, SAML, OAuth2, JWT, passwordless login, social sign-on, and more. Whether you’re building a greenfield app or retrofitting auth into a legacy system, FusionAuth adapts to your use case — not the other way around.
Need compliance? FusionAuth helps you meet GDPR, HIPAA, and COPPA standards quickly and reliably.
Deploy it your way: install on Linux, Windows, macOS, Docker, or Kubernetes — or go with FusionAuth Cloud, our managed SaaS hosting. No black boxes. No vendor lock-in. Just powerful, customizable auth that works the way you do.
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StarterKitPro
StarterKitPro is a powerful Next.js SaaS boilerplate that offers developers a streamlined foundation for building and launching applications quickly. It comes packed with essential features including built-in authentication, payment integrations with Stripe and Lemon Squeezy, email workflows, dashboards, landing pages, and SEO enhancements. The boilerplate also includes a fully functional blog and documentation setup, along with a rich library of over 50 customizable UI components to speed up frontend development. Social login support makes user onboarding effortless. Developers can build unlimited projects for personal use or client work, eliminating the need to repeatedly configure common SaaS functionalities. Designed for solopreneurs, indie hackers, and teams alike, StarterKitPro enables faster shipping and easier scalability. Its robust architecture ensures that developers can focus on building unique features rather than reinventing the wheel. Ultimately, StarterKitPro accelerates the SaaS development process, helping you get to market with confidence.
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Indie Kit
Indie Kit serves as a powerful boilerplate for NextJS 15, designed to streamline the development of SaaS, AI, or B2B applications, allowing you to launch them in a matter of days rather than months. This versatile framework features seamless authentication, integrated payment solutions, and comprehensive plan management capabilities. It effectively handles quotas, billing, multi-tenancy, and feature rendering based on organizational needs, while also ensuring user-specific API routes for enhanced security. Email services are managed through SES, accompanied by a React Email Designer, and automated workflows and notifications are facilitated by support for Background and Scheduled Jobs. An extensive super-admin interface offers dashboards for monitoring users and plans, managing waitlists, handling contact forms, and displaying real-time analytics. Crafted entirely with shadcn/ui and Tailwind CSS, Indie Kit also incorporates pre-set MDX blogging, SEO enhancements using JSON-LD, integration with S3 for file storage, webhook configurations, audit trails, and managed serverless hosting, making it a comprehensive solution for rapid development needs. With its robust features, Indie Kit empowers developers to focus on building their applications while minimizing the time spent on foundational setup.
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