FusionAuth is a modern, developer-focused identity and access management platform built to give you full control over your authentication stack. Whether you’re building a startup app or managing enterprise-scale infrastructure, FusionAuth delivers all the must-have features — from login and SSO to advanced protocols like OAuth2, OIDC, SAML, and WebAuthn — in a self-hostable or cloud-native package.
Designed with developers in mind, FusionAuth integrates seamlessly with any language, framework, or architecture. Every capability is API-first and built for extensibility, so you can tailor authentication workflows without getting locked into rigid, inflexible systems.
FusionAuth supports all the key use cases — user registration, multi-factor authentication (MFA), passwordless login, role-based access control, and more — while helping you stay compliant with GDPR, HIPAA, PCI, and other regulatory standards.
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Auth0 takes a modern approach to Identity, providing secure access to any application, for any user. Safeguarding billions of login transactions each month, Auth0 delivers convenience, privacy, and security so customers can focus on innovation. Auth0 is part of Okta, The World’s Identity Company™.
Auth0 lets you quickly integrate authentication and authorization for web, mobile, and legacy applications, with new Fine Grained Authorization (FGA) that goes beyond role-based access control.
Authenticate users across all applications with a customized, secure, and standards-based single login. Universal Login connects users to a central authorization server. Credentials aren’t transferred across sources, which boosts security and protects against phishing and credential stuffing attacks. OAuth 2.0 recommends that only external user agents (like the browser) be used by native applications for authentication flows. Auth0’s Universal Login achieves this while enabling SSO.
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LaunchFast
LaunchFast offers comprehensive SaaS starter kits for Astro, Next.js, and SvelteKit, designed to expedite project launches by integrating essential features such as SEO, analytics, authentication, payments, and email functionalities. These kits support various databases, including MongoDB, Firestore, PostgreSQL, Redis, and SQLite, providing flexibility in data management. They also facilitate seamless file and document storage through services like AWS S3, Cloudflare R2, Firebase Storage, and Supabase Storage. User authentication is streamlined with support for email/password logins, OAuth 2.0, password resets, and email verification, along with social logins from platforms like Google, Facebook, and GitHub. For billing and payments, the kits integrate with Stripe and LemonSqueezy, enabling global transactions with tax compliance. Content management is enhanced through dynamic blog pages and responsive documentation, utilizing Markdown and MDX.
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