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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ShipFast
ShipFast serves as a Next.js boilerplate aimed at accelerating the creation of SaaS products, AI applications, and diverse web solutions, allowing entrepreneurs to roll out their ventures in mere days rather than extending the process into weeks. It incorporates vital functionalities, such as user authentication through NextAuth, supporting options like Google OAuth and Magic Links, and facilitates payment processing with Stripe or Lemon Squeezy, as well as email services via Mailgun, complete with DNS configurations to mitigate spam issues. The platform is compatible with databases such as MongoDB and Supabase, offering users adaptability in managing their data. Additionally, ShipFast includes built-in SEO enhancements, a ready-to-use blog structure, and a variety of UI components and animations to improve user interaction. Comprehensive documentation and tutorials are provided to assist users in navigating the setup and deployment process, significantly reducing the time spent on repetitive tasks while enabling a sharper focus on essential business growth. Ultimately, ShipFast is designed not only to streamline initial development but also to support ongoing scalability and functionality as businesses evolve.
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Plainform
Plainform is a comprehensive Next.js SaaS starter kit designed for immediate use, allowing developers to bypass weeks of tedious setup and expedite product delivery.
This toolkit includes essential features for modern SaaS applications, such as Clerk for authentication with both OAuth and custom flows, Stripe for handling payments along with checkout processes, webhooks, coupon management, and order processing, as well as PostgreSQL integration through Prisma ORM for database management.
Additionally, it offers AWS S3 for secure file storage and Resend to facilitate transactional emails and newsletters, while Fumadocs handles content management, providing MDX-powered blogs and documentation pages.
Integrated analytics through PostHog is available from the outset, ensuring that users can track engagement effectively.
Built on the Next.js 15 App Router framework, the stack utilizes TypeScript, Tailwind CSS 4, and Radix UI, adhering to rigorous conventions that promote scalability and maintainability.
Instead of dedicating the initial sprint to configuring authentication, payment systems, email deliveries, and database setups, you receive a robust, proven foundation complete with customizable marketing pages, pricing structures, legal documentation, a blog, and comprehensive documentation, all ready for deployment.
This ensures that developers can focus on refining their unique offerings rather than getting bogged down in the setup process.
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