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 |
|---|---|---|---|
| FalkorDB FalkorDB is an ultra-fast, multi-tenant property graph database built on GraphBLAS sparse adjacency matrices, queryable via OpenCypher with… | 92 | 10490 | active |
| vwxyzjn/cleanrl CleanRL is a deep reinforcement learning library providing high-quality, single-file implementations of algorithms like PPO, DQN, DDPG, TD3… | 54 | 10481 | active |
| stakater/Reloader Reloader is a Kubernetes controller written in Go that watches for changes to ConfigMaps, Secrets, and CSI-mounted secrets, and automatical… | 97 | 10448 | active |
| rolling-scopes/rsschool-app RS School App is the web application powering the Rolling Scopes School education process, helping thousands of students train as front-end… | 75 | 10399 | active |
| ElectricSQL Electric is a real-time read-path sync engine for Postgres that replicates data into clients via a low-level HTTP API with partial replicat… | 93 | 10395 | active |
| modin-project/modin Modin is a drop-in replacement for pandas that scales DataFrame operations across all CPU cores using Ray, Dask, or Unidist as execution en… | 61 | 10389 | active |
| Velero Velero is an open-source tool (formerly Heptio Ark) that backs up and restores Kubernetes cluster resources and persistent volumes, support… | 94 | 10337 | stable |
| StarTrail-org/PixelRAG PixelRAG is a Python library and hosted service for visual retrieval-augmented generation: it renders web pages and documents into screensh… | 77 | 10320 | active |
| oceanbase/oceanbase OceanBase is a distributed relational database engine developed by Ant Group, offering MySQL compatibility, Paxos-based high availability, … | 98 | 10300 | stable |
| Polar Polar is an open-source billing and monetization platform that acts as merchant of record, offering usage-based billing, subscriptions, sea… | 96 | 10293 | active |
| Metaflow Metaflow is a human-centric Python framework from Netflix for building, managing, and deploying real-life AI/ML and data science systems. I… | 92 | 10280 | stable |
| Hangfire Hangfire is a .NET library for reliable background job processing, supporting fire-and-forget, delayed, and recurring (CRON) jobs with pers… | 93 | 10151 | stable |
| Moondream Moondream is an open-weight family of small, efficient vision language models (2B to 9B MoE) that perform image captioning, visual question… | 58 | 10127 | active |
| apache/cassandra Apache Cassandra is an open-source NoSQL distributed wide-column database written in Java, designed for linear scalability and fault tolera… | 76 | 10115 | stable |
| OpenMined/PySyft PySyft is a Python library that lets data scientists run computations on private data that stays on the data owner's server, with results s… | 73 | 10034 | active |
| Yu9191/wloc A set of proxy-tool modules (Surge, Quantumult X, Loon, Stash, Shadowrocket) that MITM Apple's network location service (gs-loc.apple.com) … | 69 | 9966 | active |
| Watermill Watermill is a Go library for building event-driven and message-driven applications over a unified Pub/Sub API. It supports Kafka, RabbitMQ… | 89 | 9910 | active |
| kubernetes/client-go The official Go client library for the Kubernetes API, providing typed clientsets, a dynamic client, API discovery, authentication plugins,… | 77 | 9908 | stable |
| Apify Agent Skills The Apify MCP Server exposes thousands of Apify Store scrapers, crawlers, and automation tools to AI agents via the Model Context Protocol,… | 83 | 9896 | active |
| Spinnaker Spinnaker is an open-source, multi-cloud continuous delivery platform created at Netflix that combines flexible pipeline management with in… | 98 | 9802 | active |
| Apache SeaTunnel Apache SeaTunnel is a distributed, high-performance data integration platform for synchronizing massive amounts of data across hundreds of … | 90 | 9700 | stable |
| xorbitsai/inference Xinference is an open-source model serving platform for deploying LLMs, embedding, speech, image, and multimodal models via a unified OpenA… | 93 | 9616 | active |
| anthropics/claude-for-legal A suite of Claude plugins, skills, and MCP connectors from Anthropic for legal workflows across practice areas like commercial, privacy, li… | 58 | 9611 | active |
| flowable/flowable-engine Flowable is an open-source Java workflow and Business Process Management (BPM) platform providing fast BPMN process, CMMN case, and DMN rul… | 76 | 9586 | stable |
| AWS Serverless Application Model (SAM) The AWS Serverless Application Model (SAM) transform is a CloudFormation macro, published as the aws-sam-translator Python package, that co… | 94 | 9574 | active |
| Higress Higress is a CNCF Sandbox, cloud-native AI-native API gateway built on Istio and Envoy, extensible with Wasm plugins written in Go, Rust, o… | 99 | 9568 | active |
| GoogleCloudPlatform/knowledge-catalog A collection of tools, agents, and samples for Google Cloud's Knowledge Catalog (formerly Dataplex), an AI-powered data catalog and metadat… | 60 | 9505 | active |
| Rocky Linux Rocky Linux is a community-driven, open-source enterprise Linux distribution built to be 100% bug-for-bug compatible with Red Hat Enterpris… | 10 | 9481 | stable |
| Falco Falco is a CNCF-graduated cloud native runtime security tool for Linux that monitors kernel events (syscalls) via eBPF or kernel modules an… | 94 | 9478 | stable |
| databendlabs/databend Databend is an open-source, cloud-native data warehouse built in Rust that runs entirely on object storage (S3, Azure, GCS). It unifies BI … | 90 | 9471 | active |
| CloudNativePG CloudNativePG is an open-source Kubernetes operator that manages the full lifecycle of highly available PostgreSQL clusters using native st… | 98 | 9440 | stable |
| Claude Code Action A GitHub Action that runs Claude Code on pull requests and issues, answering questions, reviewing code, and implementing changes triggered … | 82 | 9434 | active |
| ParadeDB ParadeDB is a Postgres extension (pg_search) that adds a custom index for fast full-text search, vector search, BM25 scoring, filtering, an… | 93 | 9424 | active |
| oumi-ai/oumi Oumi is an open-source Python framework and platform for the end-to-end lifecycle of open-weight LLMs: data synthesis, fine-tuning (SFT, Lo… | 91 | 9407 | active |
| RisingWave RisingWave is an event streaming platform that continuously ingests data from databases, event streams, and webhooks, processes it incremen… | 100 | 9381 | active |
| bitnami/sealed-secrets A Kubernetes controller plus the kubeseal CLI that lets you encrypt Kubernetes Secrets into one-way encrypted SealedSecrets that are safe t… | 97 | 9300 | active |
| Nhost Nhost is an open source Firebase alternative providing a complete backend platform built on PostgreSQL, Hasura GraphQL, authentication, fil… | 92 | 9297 | active |
| Deep Lake Deep Lake is an open-source database for AI that stores multimodal data (images, video, audio, text, embeddings, annotations) in a format o… | 75 | 9249 | active |
| zizifn/edgetunnel A project that runs V2ray proxy inside edge/serverless runtimes, primarily Cloudflare Workers. It lets users deploy a personal proxy endpoi… | 23 | 9216 | active |
| cmliu/CF-Workers-docker.io A Docker registry mirror/proxy deployed on Cloudflare Workers or Pages that forwards requests to Docker Hub and other registries. It helps … | 10 | 9208 | active |
| openstatus Openstatus is an open-source status page and uptime monitoring platform that monitors websites, APIs, and services from 28 global regions a… | 73 | 9143 | active |
| kubernetes-sigs/external-dns ExternalDNS is a Kubernetes controller that synchronizes exposed Kubernetes Services and Ingresses with external DNS providers such as AWS … | 99 | 9125 | stable |
| Artillery Artillery is an open-source load testing platform and CLI for stress-testing HTTP APIs, GraphQL, WebSocket, Socket.IO, gRPC, and browser ap… | 90 | 9091 | active |
| Webstudio Webstudio is an open-source visual website builder and Webflow alternative that gives developers and designers full control over CSS, HTML,… | 95 | 9081 | active |
| tektoncd/pipeline Tekton Pipelines is a Kubernetes-native framework that provides CRD-style resources for declaring CI/CD pipelines, using containers as buil… | 93 | 9074 | stable |
| hunshcn/gh-proxy A self-hostable proxy service that accelerates access to GitHub releases, archives, raw files, gists, and git clone operations. It ships as… | 49 | 9045 | active |
| kubernetes/autoscaler The official Kubernetes autoscaling repository containing the Cluster Autoscaler, Vertical Pod Autoscaler, and Addon Resizer components. It… | 95 | 8998 | stable |
| Kata Containers Kata Containers is an open source container runtime that builds lightweight virtual machines which plug seamlessly into the container ecosy… | 98 | 8963 | stable |
| Opensabre Microservice Platform Opensabre is a microservices development platform built on Spring Cloud 2023, integrating Spring Security, Spring Cloud Alibaba (Nacos, Sen… | 75 | 8942 | active |
| Fission Fission is an open-source, Kubernetes-native serverless framework for deploying functions as a service (FaaS). Developers write functions i… | 89 | 8933 | active |
| frappe/hrms Frappe HR is an open-source HR and Payroll application built on the Frappe Framework, offering modules for employee lifecycle, leave and at… | 95 | 8922 | active |
| iflytek/astron-agent Astron Agent is an enterprise-grade, commercial-friendly agentic workflow platform for building, orchestrating, and deploying multi-agent A… | 83 | 8910 | active |
| BentoML BentoML is a Python framework for building online serving systems for AI apps and model inference, turning model inference scripts into RES… | 91 | 8909 | stable |
| elder-plinius/OBLITERATUS OBLITERATUS is a Python toolkit for abliteration — identifying and removing refusal behaviors from large language models by locating and in… | 79 | 8861 | active |
| porsager/postgres Postgres.js is a fast, full-featured PostgreSQL client library for Node.js, Deno, Bun, and Cloudflare Workers. It uses ES6 tagged template … | 78 | 8730 | stable |
| ThreeMammals/Ocelot Ocelot is a .NET API gateway built as a series of ASP.NET Core middlewares, providing a unified entry point for microservices architectures… | 97 | 8716 | active |
| OpenShift Origin The openshift/origin repository now primarily maintains the openshift-tests binary, the conformance and end-to-end test suite for OpenShift… | 67 | 8696 | active |
| GraphQL Yoga GraphQL Yoga is a batteries-included, spec-compliant GraphQL over HTTP server library for JavaScript/TypeScript, built on Envelop and Graph… | 99 | 8529 | stable |
| Anteon Anteon (formerly Ddosify) is an open-source, eBPF-based Kubernetes monitoring and performance testing platform. It automatically generates … | 51 | 8517 | active |
| growthbook/growthbook GrowthBook is an open-source platform for feature flags, A/B testing experimentation, and product analytics, deployable via Docker or as a … | 94 | 8504 | active |
| idosal/git-mcp GitMCP is a free, open-source remote Model Context Protocol (MCP) server that turns any public GitHub repository or GitHub Pages site into … | 53 | 8465 | active |
| Flux v2 Flux v2 is an open and extensible continuous delivery solution for Kubernetes that keeps clusters in sync with Git repositories and OCI art… | 99 | 8445 | stable |
| withastro/flue Flue is an open-source TypeScript framework for building autonomous AI agents using a React-like hooks API ('use agent' directive, useModel… | 77 | 8415 | active |
| readthedocs/readthedocs.org Read the Docs is the open-source platform that powers readthedocs.org, a documentation hosting service that automatically builds, versions,… | 97 | 8393 | stable |
| kyverno/kyverno Kyverno is a Kubernetes-native policy engine for policy as code, letting platform teams author validate, mutate, generate, and cleanup poli… | 100 | 8268 | stable |
| cloudflare/agentic-inbox A self-hosted email client with an integrated AI agent that runs entirely on Cloudflare Workers. Incoming mail is handled via Cloudflare Em… | 46 | 8237 | active |
| Apache ShardingSphere ElasticJob Apache ElasticJob is a distributed scheduled job framework for the JVM that provides flexible scheduling, job sharding, and resource manage… | 74 | 8206 | stable |
| GetStream/Vision-Agents An open-source Python framework by Stream for building low-latency real-time voice and video AI agents. It provides 35+ provider plugins (O… | 83 | 8172 | active |
| Score Score is an open-source, platform-agnostic workload specification (a YAML schema, score.yaml) for describing container-based workloads and … | 85 | 8094 | active |
| webiny/webiny-js Webiny is an open-source, self-hosted content platform built as a TypeScript framework that runs on AWS serverless infrastructure (Lambda, … | 97 | 8047 | active |
| Longhorn Longhorn is a cloud-native distributed block storage system for Kubernetes that adds persistent volume support to any cluster with a single… | 95 | 8038 | stable |
| SixLabors/ImageSharp ImageSharp is a fully managed, high-performance 2D graphics and image processing library for .NET 8+. It provides loading, resizing, format… | 93 | 8034 | stable |
| gruntwork-io/terratest Terratest is a Go library that makes it easier to write automated tests for infrastructure code such as Terraform, Packer, Docker, Kubernet… | 94 | 7981 | stable |
| chaos-mesh/chaos-mesh Chaos Mesh is an open-source, cloud-native chaos engineering platform for Kubernetes that injects controlled faults (pod, network, DNS, HTT… | 92 | 7938 | active |
| KubeVela KubeVela is a CNCF-incubating, application-centric software delivery control plane built on Kubernetes and the Open Application Model. It l… | 95 | 7914 | active |
| TheLastBen/fast-stable-diffusion A collection of Google Colab notebooks for quickly running Stable Diffusion UIs (AUTOMATIC1111, ComfyUI) and training DreamBooth models for… | 53 | 7911 | active |
| Traccar Traccar is an open-source GPS tracking server written in Java that supports 200+ GPS protocols and 2000+ tracking device models. It provide… | 99 | 7874 | stable |
| panva/jose A zero-dependency JavaScript/TypeScript library implementing JSON Object Signing and Encryption standards (JWA, JWS, JWE, JWT, JWK, JWKS). … | 96 | 7808 | stable |
| MassTransit/MassTransit MassTransit is a free, open-source distributed application framework for .NET that enables message-based, loosely-coupled asynchronous comm… | 77 | 7802 | active |
| Azure Search OpenAI Demo A reference sample application implementing the Retrieval-Augmented Generation (RAG) pattern on Azure, combining Azure AI Search for docume… | 93 | 7776 | active |
| midwayjs/midway Midway is a progressive, TypeScript-first Node.js framework from Alibaba's Taobao frontend architecture team, built around a custom depende… | 100 | 7754 | active |
| OneUptime OneUptime is a complete open-source monitoring and observability platform combining uptime monitoring, incident management, on-call schedul… | 96 | 7752 | active |
| aws/karpenter-provider-aws Karpenter is an open-source Kubernetes node autoscaler that watches for unschedulable pods, provisions right-sized nodes to meet their sche… | 92 | 7721 | active |
| google-deepmind/weathernext Google DeepMind's WeatherNext family of AI weather forecasting models, including WeatherNext 2, GraphCast, and GenCast, with code and pretr… | 82 | 7709 | active |
| KubeEdge KubeEdge is a CNCF-graduated open-source framework built on Kubernetes that extends containerized application orchestration and device mana… | 95 | 7609 | stable |
| leerob/next-mdx-blog A Next.js + MDX blog and personal website template styled with Tailwind CSS and written in TypeScript. It ships with syntax highlighting, l… | 75 | 7572 | active |
| mnfst/manifest Manifest is an open-source LLM gateway and router that lets AI agents and apps reach all their model providers through one OpenAI- and Anth… | 93 | 7551 | active |
| labring/laf Laf is an open-source cloud development platform (BaaS/FaaS) offering cloud functions, cloud database (MongoDB), and cloud storage (MinIO) … | 62 | 7551 | active |
| Refly Refly is an open-source platform for building, versioning, and running reusable AI agent skills through a natural-language 'vibe workflow' … | 74 | 7531 | active |
| EleutherAI/gpt-neox GPT-NeoX is EleutherAI's library for training large-scale autoregressive transformer language models on GPUs, built on NVIDIA's Megatron an… | 67 | 7471 | active |
| Enso Analytics Enso Analytics is a self-service data preparation and analysis platform for data teams, built on a hybrid visual/textual functional program… | 84 | 7442 | active |
| anomalyco/openauth OpenAuth is a universal, standards-based OAuth 2.0 auth provider that can be deployed as a standalone service or embedded into existing app… | 35 | 7408 | active |
| Calico Calico is an open-source cloud-native networking and network security platform for Kubernetes, providing pod networking (CNI), network poli… | 99 | 7398 | stable |
| zai-org/GLM-5 GLM-5 is a family of open-weight large language models from Z.ai (Zhipu AI), including the flagship GLM-5.2 with 1M-token context and the m… | 60 | 7329 | active |
| Feast Feast is an open-source feature store for machine learning that manages offline stores for historical training data and low-latency online … | 99 | 7327 | stable |
| Honcho Honcho is an open-source memory infrastructure service for building stateful AI agents that maintain understanding of users, agents, groups… | 82 | 7327 | active |
| vLLM vLLM-Omni is a Python framework extending vLLM for efficient inference and serving of omni-modality models, including diffusion transformer… | 84 | 7280 | active |
| Zipstack/unstract Unstract is an open-source, LLM-driven platform that extracts structured JSON data from unstructured documents such as PDFs, images, and sc… | 87 | 7270 | active |
| modelcontextprotocol/registry A community-driven registry service for Model Context Protocol (MCP) servers, acting like an app store where MCP clients can discover serve… | 83 | 7268 | active |
| Alluxio/alluxio Alluxio is an open-source distributed caching and data orchestration platform that sits between compute frameworks (Spark, Presto, Trino, P… | 64 | 7248 | stable |