FusionAuth
FusionAuth was built from the ground up to integrate with any app or language. Each feature (yes, every one) is exposed via an API which gives you total flexibility to handle any use cases.
Every feature and acronym you need is included: registration & log-in, passwordless, MFA, SAML and OIDC. In seconds, you can comply with GDPR, HIPAA and COPPA requirements.
FusionAuth can be installed on any platform, on any computer, and anywhere. FusionAuth Cloud, our fully managed SaaS hosting solution, allows you to host it yourself.
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Auth0
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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Shipped
Shipped serves as a Next.js SaaS boilerplate that accelerates startup launches by offering customizable pages, including options for landing, waitlist, pre-sale, pricing, and affiliate programs. It seamlessly connects with Lemon Squeezy for payment processing, allowing users to quickly establish subscriptions and one-time purchases while sidestepping the challenges of international tax compliance. User authentication is managed through NextAuth and Supabase, offering features like magic links and support for social logins via platforms such as Google, Apple, and Facebook. The platform also provides email capabilities compatible with services like Mailchimp and Loops, facilitating both transactional emails and newsletters. Developers can select from various databases including MySQL, PostgreSQL, and MongoDB, and they can utilize Prisma for straightforward data management. Shipped features a collection of React components crafted with Chakra UI, Tailwind CSS, and shadcn/ui, ensuring a sleek and contemporary design that can be tailored to fit any brand's identity. Moreover, its extensive documentation and community support make it easier for developers to implement and customize their applications effectively.
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Nextacular
Nextacular is an open-source starter kit crafted to accelerate the creation of full-stack, multi-tenant SaaS applications. Utilizing modern technologies such as Next.js, Tailwind CSS, and Prisma, it presents a comprehensive set of features designed to simplify the development journey. Among its offerings are authentication mechanisms using magic links and social logins facilitated by NextAuth, as well as seamless database integration with relational databases like PostgreSQL and MySQL. The kit also supports multi-tenancy, enabling service to multiple customers across various subdomains or bespoke domains from a single, unified codebase. Furthermore, Nextacular incorporates functionality for teams and workspaces, enabling users to easily invite colleagues to collaborate within designated workspaces. In addition, the platform features a customizable landing page, efficient billing and subscription management via Stripe integration, and versatile design components crafted with Tailwind CSS that can be adapted to fit your unique design system. With these capabilities, Nextacular empowers developers to focus on building innovative solutions without getting bogged down in repetitive setup tasks.
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