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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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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Launch Leopard
Launch Leopard serves as a SvelteKit boilerplate aimed at accelerating the creation of tools, SaaS platforms, and AI-driven applications by offering a well-rounded collection of pre-configured technologies. By combining SvelteKit with TypeScript, it establishes a solid framework for applications and provides user authentication through Auth.js or Supabase, including options for social logins with Google, GitHub, and Apple. Additionally, the platform streamlines payment processes through Stripe, which simplifies subscription management and invoicing tasks. For efficient data operations, it utilizes Drizzle ORM, compatible with any SQL database, allowing for quick and lightweight query execution. The user interface is designed using TailwindCSS and DaisyUI, incorporating ready-to-use components such as modals, navigation menus, dropdowns, pricing tables, and hero sections to enhance user experience. Email services are efficiently handled by Loops, facilitating the delivery of both transactional and promotional emails, including login links and invoices. Furthermore, Launch Leopard extends its functionality by supporting AI integration via the OpenAI API, making it a versatile choice for modern development needs. This comprehensive setup allows developers to focus more on building unique features rather than getting bogged down by initial configurations.
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LaunchFast
LaunchFast delivers all-inclusive SaaS starter kits tailored for frameworks like Astro, Next.js, and SvelteKit, aimed at accelerating project launches by incorporating vital functionalities such as SEO optimization, analytics tracking, user authentication, payment processing, and email capabilities. These versatile kits offer support for a range of databases, including MongoDB, Firestore, PostgreSQL, Redis, and SQLite, ensuring adaptability in managing data effectively. Additionally, they enable effortless file and document storage by leveraging services such as AWS S3, Cloudflare R2, Firebase Storage, and Supabase Storage. The user authentication process is simplified with options for email and password logins, OAuth 2.0, password reset capabilities, and email verification, along with social login features from major platforms like Google, Facebook, and GitHub. To facilitate billing and payment processing, the kits are integrated with Stripe and LemonSqueezy, allowing for international transactions while ensuring tax compliance. Furthermore, the content management aspect is optimized through the creation of dynamic blog pages and responsive documentation, making use of Markdown and MDX, which enhances overall user experience and engagement. LaunchFast's starter kits are designed to empower developers to focus on building innovative applications rather than getting bogged down by foundational setup tasks.
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