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Top BACKEND GitHub Repositories & Tools (2026)
Discover the most starred and trending open source tools tagged with #backend.
Open Source realtime backend in 1 file
Build, run and scale AI agents like API and microservices
Run any process, on your machine or in an AI agent's environment, as if it were a pod in your Kubernetes cluster: real env vars, DNS, network, traffic.
Apache Lucene open-source search software
Self-Hosted API Management for Builders
Open-source Back-end, self-hostable & ready to use - Real-time, storage, advanced search - Web, Apps, Mobile, IoT -
Sentry SDK for Ruby
Batteries-included backend that works with any stack.
Backend.AI is a streamlined, container-based computing cluster platform that hosts popular computing/ML frameworks and diverse programming languages, with pluggable heterogeneous accelerator support including CUDA GPU, ROCm GPU, Gaudi NPU, Google TPU, GraphCore IPU and other NPUs.
Fastify 5 application boilerplate based on clean architecture, domain-driven design, CQRS, functional programming, vertical slice architecture for building production-grade applications 🚀
💎 Ruby on Rails agent for Forest Admin to integrate directly to your existing Ruby on Rails backend application.
Servercn , the backend component registry for Node.js inspired by shadcn/ui. The shadcn philosophy for Node.js backend.
Instant SECURE Full Stack Apps and AI Agents
Modular framework for creating selective indexers and featureful backends for dapps
The Buildsmith framework. Fast, async, and built with everything you need to ship.
The backend agents build with - Multimodal database, orchestration, and serving in one file
The SMS Gateway for Android™ Server enables the dispatch of SMS messages through Android devices without requiring direct Internet access to them.
Open-source Telegram server implementation / MTProto server in Go for Telegram Desktop, Android, Web, bots, calls, media, and self-hosted chat experiments.
the browser-facing portion of osu!