Parse Server

Parse Server is a self-hostable, open-source backend for applications, providing a compatible API for the Parse platform SDKs. It enables developers to migrate their applications from the hosted Parse.com service (which was deprecated) to their own infrastructure, offering full control over their data and backend logic. The current stable version is 9.8.0. The project maintains an active development pace with frequent alpha releases for new features and bug fixes, typically leading to stable minor versions every few weeks or months. Key differentiators include its adherence to the Parse API specification, allowing seamless migration, extensive customization via Cloud Code and webhooks, and flexible database support (primarily MongoDB and PostgreSQL). It integrates directly with Express.js, making it easy to embed into existing Node.js applications.