The open source Firebase alternative. Supabase adds realtime and restful APIs to Postgres without a single line of code.

Harper.Fast is described as 'Open-source Node.js platform combining in-memory database, cache, app logic, and messaging with instant GraphQL-based REST APIs, real-time messaging, and global deployment in one runtime' and is a backend as a service in the development category. There are six alternatives to Harper.Fast for Web-based, Self-Hosted, SaaS and Docker. The best Harper.Fast alternative is Supabase, which is both free and Open Source. Other great apps like Harper.Fast are Firebase, Appwrite, Nhost and Ably.
The open source Firebase alternative. Supabase adds realtime and restful APIs to Postgres without a single line of code.

Firebase, provided by Google, is a backend service and application development platform. It uses AI, cloud infrastructure, and cross-platform SDKs for efficient app development. Firebase offers tools and infrastructure for app creation and business growth.


Secure open-source backend server for web and mobile developers. Appwrite provides developers with a set of easy-to-use and integrate REST APIs to manage their core backend needs.




Nhost is an open source Firebase alternative with GraphQL, built with the following things in mind:

Scalable pub/sub platform offers developers secure, low-latency, enterprise-grade realtime messaging, built-in features for GPS tracking, event updates, and automatic failover, delivering billions of messages daily to users across industries on a global edge network.



Singlebase is the ultimate Firebase alternative. 🚀 We provision NoSQL Datastore, Authentication, Storage, Images, Search & Analytics in under 30 seconds ?.


