The best open source alternative to Convex is Supabase. If that doesn't suit you, we've compiled a ranked list of other open source Convex alternatives to help you find a suitable replacement. Other interesting open source alternatives to Convex are: PocketBase, Encore, and Bknd.
Convex alternatives are mainly Backend-as-a-Service (BaaS) Tools but may also be PaaS & Deployment Tools or Development Environments. Browse these if you want a narrower list of alternatives or looking for a specific functionality of Convex.
A powerful, scalable backend platform offering real-time databases, authentication, storage, and serverless functions for rapid development.

Supabase is an open-source platform that revolutionizes backend development, providing developers with a comprehensive suite of tools to build modern applications quickly and efficiently. At its core, Supabase offers:
Supabase combines these features into a cohesive, developer-friendly platform that scales with your needs. Whether you're building a small prototype or a large-scale application, Supabase provides the tools and flexibility to bring your ideas to life quickly and efficiently. With its open-source nature, you benefit from a transparent, community-driven ecosystem and the freedom to self-host or use the managed cloud service.
Looking for open source alternatives to other popular services? Check out other posts in the alternatives series and openalternative.co, a directory of open source software with filters for tags and alternatives for easy browsing and discovery.
A lightweight, self-hosted backend solution with real-time database, authentication, and file storage capabilities.

PocketBase is a revolutionary open-source backend solution that simplifies application development by providing a powerful, all-in-one platform. Packaged as a single executable file, it offers a real-time database, authentication system, and file storage, making it an ideal choice for developers seeking efficiency and ease of use.
Key benefits of PocketBase include:
PocketBase empowers developers to build feature-rich applications without the complexity of traditional backend setups. Its lightweight nature and comprehensive feature set make it an excellent choice for both beginners and experienced developers looking to streamline their development process.
A powerful platform for building cloud backends, automating infrastructure, and simplifying development workflows for faster, more efficient coding.

Encore revolutionizes backend development by providing a seamless, integrated platform that combines the power of cloud infrastructure with the simplicity of local development. By abstracting away the complexities of distributed systems, Encore allows developers to focus on writing business logic while automatically handling scalability, deployment, and infrastructure management.
Key benefits of Encore include:
By choosing Encore, teams can significantly reduce time-to-market, improve code quality, and focus on delivering value to their users instead of wrestling with infrastructure complexities.
Lightweight Firebase alternative with database, auth, storage, and workflows. Framework-agnostic backend that integrates with NextJS, Remix, Hono and more.

BKND is a comprehensive backend solution designed for modern developers who need flexibility without complexity. This lightweight Firebase alternative provides all essential backend services while maintaining the freedom to deploy anywhere.
Core Features:
Built for Modern Development:
The platform offers complete extensibility through its workflow builder, allowing you to inject custom logic into system events. As an open source solution, you maintain full control over your backend while benefiting from community contributions.
Get started instantly with npx bknd@latest run and experience a backend that adapts to your needs, not the other way around.