Open-source cloud software
1969 open-source libraries, tools and applications tagged cloud, ranked by how closely cloud is their primary purpose, then by adoption and maintenance health. Each entry links to a page with sources, use cases and when to choose or avoid it.
1969 products, primary matches first, then adoption-weighted; health v2 shown.
| Product | Health v2 | Stars | Maturity |
|---|---|---|---|
| Mountpoint for Amazon S3 Mountpoint for Amazon S3 is a high-throughput FUSE file client that mounts an Amazon S3 bucket as a local file system. It translates file o… | 92 | 5781 | stable |
| 60s API A collection of free, open-source REST APIs delivering daily news digests, Chinese social media trending lists (Weibo, Bilibili, Douyin, Zh… | 89 | 5779 | active |
| softprops/action-gh-release A GitHub Action for creating GitHub Releases from CI workflows, with support for uploading release assets via glob patterns and updating ex… | 95 | 5767 | active |
| Nuclio Nuclio is a high-performance open-source serverless (FaaS) platform for real-time event and data processing, deployable standalone via Dock… | 92 | 5760 | stable |
| Discovery Nepxion Discovery is a cloud-native microservice governance framework for Spring Cloud and Spring Cloud Alibaba. It provides blue-green and… | 46 | 5752 | active |
| FxEmbed FxEmbed is a Cloudflare Worker service that powers FxTwitter, FixupX, and FxBluesky, rewriting X/Twitter and Bluesky links into rich embeds… | 77 | 5751 | active |
| LitmusChaos LitmusChaos is an open-source, CNCF-hosted chaos engineering platform for cloud-native Kubernetes infrastructure. It provides a ChaosCenter… | 100 | 5730 | stable |
| Karmada Karmada is an open-source Kubernetes management system that orchestrates cloud-native applications across multiple Kubernetes clusters and … | 94 | 5729 | active |
| partykit/partykit PartyKit is a framework and platform for building realtime multiplayer applications using JavaScript/TypeScript servers ('parties') deploye… | 78 | 5728 | active |
| Gen-Verse/OpenClaw-RL OpenClaw-RL is a framework for training personalized AI agents through reinforcement learning using natural conversation as feedback. It us… | 49 | 5722 | active |
| kgateway-dev/kgateway kgateway is a Kubernetes-native API gateway and ingress controller that implements the Kubernetes Gateway API as a control plane for Envoy … | 100 | 5713 | stable |
| Gemma The official PyTorch implementation of Google's Gemma family of open large language models, including text-only and multimodal variants. It… | 10 | 5710 | active |
| middleapi/orpc oRPC is a TypeScript framework for building end-to-end typesafe APIs without code generation, combining RPC-style typed clients with first-… | 86 | 5702 | active |
| lm-sys/RouteLLM RouteLLM is a Python framework for serving and evaluating LLM routers that route queries between strong and weak models to cut costs. It pr… | 25 | 5626 | active |
| Azure/azure-sdk-for-python The official Azure SDK for Python, a monorepo of client and management libraries for interacting with Azure services from Python. It includ… | 96 | 5621 | active |
| google/clusterfuzz ClusterFuzz is Google's scalable fuzzing infrastructure that finds security and stability bugs in software, serving as the backend for OSS-… | 95 | 5613 | active |
| Devtron Devtron is an open-source, AI-native Kubernetes management platform that unifies application delivery, infrastructure management, CI/CD, an… | 95 | 5609 | active |
| ZenML ZenML is an open-source MLOps framework for building, deploying, and managing production ML pipelines, LLM workflows, and AI agents on any … | 97 | 5601 | active |
| pgdogdev/pgdog PgDog is a PostgreSQL proxy written in Rust that combines connection pooling, query load balancing, and database sharding in a single binar… | 85 | 5584 | active |
| apache/hbase Apache HBase is an open-source, distributed, versioned, column-oriented NoSQL database modeled after Google Bigtable, running on top of Apa… | 91 | 5560 | stable |
| kubernetes-sigs/descheduler Descheduler is a Kubernetes component that evicts pods whose original scheduling decisions no longer make sense, such as pods on under- or … | 98 | 5548 | stable |
| lakeFS lakeFS is an open-source data version control service that turns object storage (S3, Azure Blob, GCS) into a Git-like repository with branc… | 93 | 5547 | stable |
| Excalidraw An MCP (Model Context Protocol) server that lets AI clients like Claude and ChatGPT generate and stream interactive hand-drawn Excalidraw d… | 55 | 5516 | active |
| DevSec Hardening Framework An Ansible collection of battle-tested hardening roles for Linux operating systems, SSH, nginx, and MySQL/MariaDB. It automates secure conf… | 95 | 5499 | active |
| mosaicml/composer Composer is an open-source PyTorch-based deep learning training library by MosaicML (now Databricks) for training neural networks faster an… | 66 | 5499 | active |
| ServiceStack ServiceStack is a full-featured, message-based web services framework for .NET that lets you declare typed Request DTOs once and generate A… | 98 | 5496 | active |
| unkeyed/unkey Unkey is an open-source, source-available developer platform for modern APIs that combines instant deployments, a globally distributed gate… | 92 | 5462 | active |
| 7Sageer/sublink-worker A lightweight proxy subscription converter and manager that transforms subscription links and full configs into Sing-Box, Clash, Surge, or … | 81 | 5455 | active |
| sadmann7/skateshop An open-source e-commerce skateshop web application built with Next.js 14 and the T3 stack, featuring a storefront, seller and customer wor… | 33 | 5445 | active |
| GitHub Agentic Workflows GitHub Agentic Workflows (gh-aw) is a GitHub CLI extension that lets developers define AI-powered repository automation in Markdown with YA… | 82 | 5425 | active |
| agentgateway/agentgateway Agentgateway is an open-source, Rust-based proxy and gateway for agentic AI traffic, handling LLM provider routing, MCP tool servers, and A… | 83 | 5420 | active |
| fluxcd/flagger Flagger is a progressive delivery Kubernetes operator that automates canary releases, A/B testing, and Blue/Green deployments by gradually … | 87 | 5418 | stable |
| docker/build-push-action A GitHub Action that builds and pushes Docker images using Buildx with full BuildKit feature support, including multi-platform builds, secr… | 97 | 5411 | stable |
| googleapis/google-cloud-python The official monorepo of idiomatic Python client libraries for Google Cloud Platform services, covering APIs like BigQuery, Storage, AI Pla… | 95 | 5411 | stable |
| ory/keto Ory Keto is an open-source authorization server implementing Google's Zanzibar model for scalable, low-latency permission checks. It suppor… | 74 | 5402 | active |
| VibeSDK An open-source SDK for building your own vibe-coding platform where users describe full-stack apps and an AI coding agent plans, edits, dep… | 71 | 5401 | active |
| peaceiris/actions-gh-pages A GitHub Action that deploys static files to GitHub Pages, publishing a directory to the gh-pages branch from CI workflows. It works with a… | 79 | 5368 | stable |
| novicezk/midjourney-proxy A Java-based proxy service that wraps MidJourney's Discord channel into a REST API, enabling programmatic AI image generation. It supports … | 43 | 5361 | active |
| microsoft/azurelinux Azure Linux is an open-source, general-purpose Linux distribution built and optimized for Microsoft Azure, with sources derived from Fedora… | 99 | 5355 | active |
| openkruise/kruise OpenKruise is a CNCF incubating suite of Kubernetes controllers and CRDs that extends core workload management with advanced capabilities l… | 92 | 5352 | active |
| dunglas/mercure Mercure is an open protocol (with an IETF Internet-Draft) for pushing real-time updates to browsers and HTTP clients over Server-Sent Event… | 95 | 5344 | stable |
| superduper-io/superduper Superduper is an open-source Python framework for building database-integrated AI applications and agents, connecting models, embeddings, a… | 44 | 5329 | active |
| ThreatMapper Deepfence ThreatMapper is an open-source Cloud Native Application Protection Platform (CNAPP) that hunts threats in production cloud, Kuber… | 78 | 5324 | active |
| readysettech/readyset Readyset is a transparent, wire-compatible SQL caching proxy for Postgres and MySQL that sits between your application and database. It cac… | 98 | 5287 | active |
| FailproofAI/failproofai Failproof AI is an open-source observability and enforcement layer for AI agent harnesses like Claude Code, Codex, Hermes, and OpenClaw, ca… | 82 | 5268 | active |
| CodeGenieApp/serverless-express A Node.js library that lets you run Express and other Node.js web frameworks on AWS Lambda and API Gateway (plus Lambda@Edge and Azure Func… | 68 | 5260 | active |
| fluvio-community/fluvio Fluvio is a distributed data streaming engine written in Rust that combines a Kafka-like event streaming platform with the Stateful DataFlo… | 79 | 5256 | active |
| grafana/mimir Grafana Mimir is an open source, horizontally scalable, highly available, multi-tenant time series database providing long-term storage for… | 99 | 5254 | active |
| includeos/IncludeOS IncludeOS is a minimal, resource-efficient unikernel operating system for C++ services, linked directly into your application via `#include… | 56 | 5253 | active |
| microsoft/SynapseML SynapseML (formerly MMLSpark) is an open-source machine learning library built on Apache Spark that provides simple, composable, distribute… | 84 | 5247 | active |
| pollinations/pollinations Pollinations is an open-source generative AI platform offering free APIs for text, image, and vision model inference without requiring API … | 77 | 5226 | active |
| AgnesAI-Labs/AgnesAI-Models Official gateway and model catalog for Agnes AI, providing OpenAI-compatible API access to multimodal foundation models covering text, imag… | 55 | 5192 | active |
| vllm-project/aibrix AIBrix is an open-source, cloud-native framework from the vLLM project providing essential building blocks for scalable, cost-efficient Gen… | 88 | 5149 | active |
| exa-labs/exa-mcp-server An open-source MCP (Model Context Protocol) server that connects AI assistants and agents to Exa's web search, code search, content fetchin… | 66 | 5112 | active |
| Jitsu Jitsu is an open-source, self-hostable event data platform and Segment alternative that collects event data from websites, apps, and server… | 95 | 5108 | active |
| Ryze AI Marketing MCP A unified MCP (Model Context Protocol) server exposing 250+ tools for managing Google Ads, Meta (Facebook/Instagram) Ads, and Google Analyt… | 60 | 5083 | active |
| nginx/kubernetes-ingress The official NGINX and NGINX Plus Ingress Controller for Kubernetes, maintained by the NGINX team at F5. It translates Kubernetes Ingress r… | 96 | 5078 | stable |
| cilium/tetragon Tetragon is an eBPF-based security observability and runtime enforcement tool from the Cilium project. It monitors process execution, sysca… | 88 | 5067 | active |
| Pomerium Pomerium is an open-source, identity- and context-aware reverse proxy that provides clientless, zero-trust access to internal applications … | 99 | 5056 | active |
| diggerhq/digger Digger (now rebranded OpenTaco) is an open-source Infrastructure-as-Code orchestration tool that runs Terraform plan and apply directly ins… | 94 | 5048 | active |
| ArroyoSystems/arroyo Arroyo is a distributed stream processing engine written in Rust that lets users run stateful computations on high-volume real-time data st… | 76 | 5048 | active |
| antonkomarev/github-profile-views-counter A free cloud micro-service that counts GitHub profile views and displays the count as a badge in your profile README via a Markdown image U… | 57 | 5042 | active |
| sea-protocol/seaprotocol Sea Protocol is a decentralized exchange (DEX) protocol combining order-book and AMM trading, implemented in Move on the Aptos and Sui bloc… | 60 | 5040 | active |
| developersdigest/llm-answer-engine A Perplexity-inspired AI answer engine built with Next.js, the Vercel AI SDK, LangChain.JS, Groq/Mixtral, Brave Search, Serper, and OpenAI.… | 58 | 5035 | active |
| OpenNext OpenNext is an open-source adapter that converts the Next.js build output into packages deployable to platforms beyond Vercel, natively sup… | 92 | 5029 | active |
| LangWatch LangWatch is an open-source LLMOps platform for LLM evaluation, AI agent testing, tracing, and production observability. It combines agent … | 91 | 4983 | active |
| Apache Dubbo Apache Dubbo-go is the official Go implementation of the Apache Dubbo microservice framework, providing high-performance RPC with service d… | 95 | 4964 | active |
| atilaahmettaner/tradingview-mcp An MCP server exposing TradingView market data, technical indicators, screeners, and backtesting as tools for AI assistants like Claude, Ch… | 63 | 4957 | active |
| SolaceLabs/solace-agent-mesh Solace Agent Mesh is an open-source Python framework for building event-driven multi-agent AI systems where specialized agents collaborate … | 10 | 4923 | active |
| M3 M3 is an open-source distributed metrics platform comprising a purpose-built time series database (M3DB), a metrics aggregator, a Prometheu… | 87 | 4908 | stable |
| Security Onion Security Onion is a free and open Linux distribution and platform for threat hunting, enterprise security monitoring, and log management. I… | 92 | 4906 | stable |
| llm-d llm-d is a Kubernetes-native distributed LLM inference serving stack that orchestrates model servers like vLLM and SGLang across clusters. … | 83 | 4891 | active |
| ethanniser/NextFaster NextFaster is a highly performant e-commerce template built with Next.js 15, featuring partial prerendering, Server Actions, Drizzle ORM on… | 64 | 4875 | active |
| DGIOT DGIOT is an open-source industrial IoT platform built on Erlang/OTP and EMQX that aggregates device connectivity across 300+ protocols incl… | 83 | 4852 | active |
| Agenta-AI/agenta Agenta is an open-source, self-hostable workspace where teams build, run, and share AI agents and automations by chatting with them. It pro… | 93 | 4835 | active |
| rivet-dev/agentos agentOS is a library that gives AI agents a lightweight operating system running inside your existing backend process, using WebAssembly an… | 94 | 4809 | active |
| gomods/athens Athens is an open-source, enterprise-ready implementation of the Go Module proxy server that caches and serves Go modules via the Go Module… | 94 | 4806 | active |
| SeldonIO/seldon-core Seldon Core 2 is an MLOps and LLMOps framework for deploying, managing, and scaling machine learning models and modular AI applications on … | 66 | 4782 | active |
| YDB YDB is an open-source distributed SQL DBMS written in C++ that combines horizontal scalability, high availability, and strict consistency w… | 98 | 4781 | stable |
| liveblocks/liveblocks Liveblocks is a realtime collaboration infrastructure and SDK toolkit for adding multiplayer features, comments, notifications, and AI copi… | 95 | 4758 | stable |
| Ant Media Server Ant Media Server is a scalable open-source media server for ultra-low latency live streaming, built around WebRTC (~0.5s latency) with supp… | 92 | 4742 | stable |
| werf werf is a CNCF Sandbox CLI tool that implements full-cycle CI/CD for Kubernetes, integrating with your CI system to build, publish, test, a… | 93 | 4727 | stable |
| u14app/deep-research Deep Research is a web application that uses any large language model (Gemini, OpenAI, Anthropic, DeepSeek, Grok, Ollama, etc.) combined wi… | 66 | 4691 | active |
| Jenkins X (JayeX) Jenkins X (jx) is a modular command-line CLI for Jenkins X 3.x, providing automated CI/CD on Kubernetes using Cloud Native Tekton pipelines… | 95 | 4690 | active |
| cf-pages/Telegraph-Image A free, self-deployable image hosting application that serves as a Flickr/Imgur alternative, built on Cloudflare Pages with uploads stored … | 71 | 4689 | active |
| IBM/mcp-context-forge ContextForge is an open-source AI gateway, registry, and proxy from IBM that federates MCP, A2A, and REST/gRPC APIs behind a unified endpoi… | 86 | 4646 | active |
| NateBJones-Projects/OB1 Open Brain is a self-hosted personal memory infrastructure combining a vector-search database, an AI gateway, and an MCP server so any AI t… | 58 | 4632 | active |
| Cerbos Cerbos is an open-core, language-agnostic policy decision point (PDP) that externalizes authorization from application code using context-a… | 94 | 4616 | stable |
| JamesIves/github-pages-deploy-action A GitHub Action that automatically deploys a project's production-ready build output to GitHub Pages, pushing to any branch such as gh-page… | 96 | 4614 | stable |
| cloudflare/workers-sdk The Cloudflare Workers SDK is a monorepo containing Wrangler, the official CLI for building, testing, and deploying Cloudflare Workers serv… | 95 | 4612 | active |
| Memgraph Memgraph is a high-performance, in-memory graph database written in C++ that is Cypher-compatible and ACID-compliant, with built-in vector,… | 96 | 4579 | stable |
| fixie-ai/ultravox Ultravox is a fast multimodal LLM that understands human speech directly without a separate ASR stage, by projecting audio into the LLM's e… | 40 | 4577 | active |
| Virtual Kubelet Virtual Kubelet is an open-source Kubernetes kubelet implementation that masquerades as a kubelet to connect Kubernetes clusters to other A… | 88 | 4575 | active |
| Restate Restate is a lightweight distributed runtime that turns backend services, workflows, and AI agents into durable processes with automatic re… | 98 | 4536 | active |
| CISO Assistant CISO Assistant is an open-source, self-hostable GRC (Governance, Risk, and Compliance) platform covering risk management, compliance and au… | 91 | 4521 | active |
| emissary-ingress/emissary Emissary-ingress is an open-source, Kubernetes-native API gateway, Layer 7 load balancer, and Kubernetes Ingress built on Envoy Proxy. It i… | 83 | 4521 | stable |
| Google Cloud Go Client Libraries The official Google Cloud Client Libraries for Go, providing idiomatic Go packages for accessing Google Cloud Platform services such as Sto… | 95 | 4520 | active |
| pydantic/logfire Pydantic Logfire is an AI observability platform built on OpenTelemetry that traces LLM calls, agent runs, and application telemetry in one… | 87 | 4512 | active |
| Judge0 Judge0 is an open-source, sandboxed online code execution system exposing a simple HTTP JSON API for compiling and running untrusted code i… | 68 | 4485 | active |
| TypeDB TypeDB is a strongly-typed, polymorphic general-purpose database written in Rust, with its own declarative query language TypeQL, unifying … | 97 | 4475 | active |