Appwrite

Appwrite is an open-source Backend-as-a-Service (BaaS) platform designed to simplify backend development for web, mobile, and server-side applications. It provides a suite of backend tools, including authentication, databases, storage, serverless functions, and real-time APIs. Appwrite is self-hosted, offering developers full control over their infrastructure and data while supporting multiple programming languages and frameworks. It is an alternative to Firebase, with a strong focus on privacy, security, and flexibility.

Website: appwrite.io