Auth0
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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FusionAuth
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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Shipped
Shipped is a Next.js SaaS boilerplate designed to expedite the launch of startups by providing customizable pages such as landing, waitlist, pre-sale, pricing, and affiliate program pages. It integrates with Lemon Squeezy for payment processing, enabling quick setup of subscriptions and one-time purchases without the complexities of international taxation. User authentication is facilitated through NextAuth and Supabase, supporting magic links and social logins from providers like Google, Apple, and Facebook. The platform offers email functionalities compatible with services like Mailchimp and Loops, allowing for transactional emails and newsletters. Developers can choose from databases such as MySQL, PostgreSQL, and MongoDB, utilizing Prisma for simplified data transactions. Shipped includes a library of React components built with Chakra UI, Tailwind CSS, and shadcn/ui, providing an elegant and modern design that is easily customizable to match brand aesthetics.
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