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 |
|---|---|---|---|
| Apache Spark Apache Spark is a unified analytics engine for large-scale data processing, providing high-level APIs in Scala, Java, Python, and R over an… | 77 | 44159 | stable |
| Drizzle ORM Drizzle ORM is a lightweight, headless TypeScript ORM for SQL databases with zero dependencies and full type safety. It supports PostgreSQL… | 98 | 36001 | active |
| SeaweedFS SeaweedFS is a fast distributed storage system written in Go that provides S3-compatible object storage, a POSIX-compliant distributed file… | 95 | 35551 | active |
| agentscope-ai/QwenPaw QwenPaw is a self-hosted personal AI assistant built in Python that connects to multiple chat channels (DingTalk, Feishu, QQ, Discord, iMes… | 80 | 35441 | active |
| xai-org/x-algorithm X-Algorithm is an open-source Rust library that powers the For You feed on X. It combines in‑network and out‑of‑network content, applies fi… | 60 | 33483 | active |
| Linera Linera is a Rust-based decentralized blockchain infrastructure that provides core protocol components, client/server logic, and cross-chain… | 84 | 32056 | active |
| Chroma Chroma is an open-source search and retrieval database for AI applications, supporting dense vector, sparse (BM25/SPLADE), full-text, regex… | 86 | 29471 | active |
| XGBoost XGBoost is an optimized, scalable gradient boosting library implementing parallel tree boosting (GBDT/GBM) with bindings for Python, R, Jav… | 94 | 28887 | stable |
| MLflow MLflow is an open source AI engineering platform for agents, LLMs, and traditional ML models, providing experiment tracking, model registry… | 100 | 28441 | stable |
| Jenkins Jenkins is the leading open-source automation server, built in Java, used for continuous integration and continuous delivery of software. I… | 95 | 26671 | stable |
| SpacetimeDB SpacetimeDB is a relational database with embedded server-side logic (reducers), real-time client sync, auth, and deployment built into a s… | 96 | 25273 | active |
| Sentinel Sentinel is a flow control and reliability library for microservices, providing rate limiting, traffic shaping, concurrency limiting, circu… | 70 | 23144 | stable |
| Apache RocketMQ Apache RocketMQ is a distributed cloud-native messaging and streaming platform built for low-latency, high-throughput, financially reliable… | 87 | 22629 | stable |
| JHipster JHipster is a Yeoman-based development platform that scaffolds complete full-stack web applications and microservice architectures, combini… | 94 | 22465 | stable |
| .NET The .NET platform is a free, open‑source, cross‑platform framework for building modern applications. It includes a runtime, SDK, libraries,… | 97 | 22036 | active |
| QuantConnect LEAN LEAN is an open‑source, event‑driven algorithmic trading engine written in C# with Python support. It provides a modular framework for rese… | 66 | 21779 | active |
| Teleport Teleport is an identity-aware access proxy and certificate authority that provides unified, credential-free access to SSH servers, Kubernet… | 88 | 20995 | stable |
| .NET Runtime The official .NET runtime, base class libraries, and shared host source repository maintained by Microsoft and the .NET Foundation. It prov… | 100 | 18367 | stable |
| Windmill Windmill is an open-source, self-hostable developer platform that turns scripts in Python, TypeScript, Go, Bash, SQL and other languages in… | 96 | 18219 | active |
| MemoriLabs/Memori Memori is agent-native memory infrastructure that turns LLM agent execution and conversation into structured, persistent state. It ships as… | 77 | 17149 | active |
| cvat-ai/cvat CVAT (Computer Vision Annotation Tool) is an open-source, self-hosted platform for annotating images, videos, and 3D point clouds to build … | 94 | 16896 | active |
| kubernetes/kops kOps (Kubernetes Operations) is a CLI tool for creating, upgrading, and maintaining production-grade, highly available Kubernetes clusters,… | 96 | 16692 | active |
| Pipecat Pipecat is an open-source Python framework (BSD-2) for building real-time voice and multimodal conversational AI agents. It orchestrates sp… | 89 | 16579 | active |
| Dagger Dagger is a programmable automation engine for building, testing, and shipping software, replacing YAML pipelines with real code via SDKs i… | 94 | 16334 | active |
| hashicorp/packer HashiCorp Packer is a CLI tool that builds identical machine images (AMIs, VMDK, Docker images, etc.) for multiple platforms in parallel fr… | 94 | 15807 | stable |
| Apache Pulsar Apache Pulsar is a cloud-native, distributed pub-sub messaging and streaming platform originally developed at Yahoo and now a top-level Apa… | 99 | 15346 | stable |
| livekit/agents LiveKit Agents is an open-source framework for building realtime, multimodal voice AI agents that run as programmable participants in LiveK… | 91 | 14870 | active |
| JuiceFS JuiceFS is a high-performance, POSIX-compatible distributed file system that stores file data in object storage (e.g., Amazon S3) and metad… | 96 | 14549 | stable |
| OpenNHP/opennhp OpenNHP is a lightweight, cryptography-powered open-source toolkit written in Go that implements the Cloud Security Alliance's Network-infr… | 97 | 13936 | active |
| AWS CDK The AWS Cloud Development Kit (CDK) is an open-source framework for defining cloud infrastructure in code using familiar programming langua… | 95 | 12941 | stable |
| TencentCloud/CubeSandbox CubeSandbox is a high-performance sandbox service for AI agents built on RustVMM and KVM, creating hardware-isolated MicroVM sandboxes in u… | 80 | 12853 | active |
| open-policy-agent/opa Open Policy Agent (OPA) is a general-purpose, open-source policy engine that unifies policy enforcement across the stack using a high-level… | 96 | 12264 | stable |
| kubeshark/kubeshark Kubeshark is an eBPF-powered network observability tool for Kubernetes that indexes cluster-wide L4/L7 traffic with full Kubernetes context… | 99 | 12101 | active |
| MemTensor/MemOS MemOS is a memory operating system for LLMs and AI agents that unifies storing, retrieving, and managing long-term, multi-modal memory thro… | 85 | 12014 | active |
| tensorzero/tensorzero TensorZero is an open-source LLMOps platform that unifies an LLM gateway, observability, evaluation, optimization, and experimentation behi… | 10 | 11716 | active |
| PipedreamHQ/pipedream Pipedream is a hosted integration platform for developers to connect APIs and build event-driven automations using pre-built components plu… | 75 | 11707 | active |
| vCluster vCluster is an open-source tool that creates fully functional virtual Kubernetes clusters, each running inside a namespace of an underlying… | 96 | 11351 | stable |
| nitrojs/nitro Nitro is a TypeScript server toolkit that extends Vite apps with a production-ready server featuring file-based routing, caching, KV storag… | 100 | 11293 | active |
| siderolabs/talos Talos Linux is a minimal, immutable, API-managed Linux distribution purpose-built for running Kubernetes. It ships no shell, SSH, or packag… | 96 | 11246 | stable |
| Centrifugo Centrifugo is an open-source, language-agnostic real-time messaging (PUB/SUB) server written in Go that delivers messages to online users o… | 98 | 10843 | stable |
| Tyk API Gateway Tyk Gateway is a cloud-native, open-source API Gateway written in Go that supports REST, GraphQL, TCP, and gRPC protocols. It provides rate… | 93 | 10840 | stable |
| Terragrunt Terragrunt is a flexible orchestration tool that lets Infrastructure as Code written in OpenTofu/Terraform scale, adding a configuration an… | 94 | 9883 | stable |
| FreeBSD The official publish-only Git mirror of the FreeBSD source tree, containing the complete kernel, userland, libraries, boot loader, and buil… | 77 | 9398 | stable |
| Checkov Checkov is a static code analysis tool for infrastructure as code (Terraform, CloudFormation, Kubernetes, Helm, Dockerfile, and more) that … | 94 | 9060 | stable |
| Delta Lake Delta Lake is an open-source storage framework and table format that brings ACID transactions, scalable metadata handling, schema enforceme… | 95 | 9053 | stable |
| immudb immudb is an open-source immutable database written in Go that stores data in SQL, key-value, or document models while guaranteeing tamper-… | 92 | 9042 | stable |
| teamhanko/hanko Hanko is an open-source authentication and user management platform built in Go, offering passwords, passkeys (WebAuthn/FIDO2), MFA, OAuth … | 94 | 9041 | active |
| Senparc.Weixin .NET SDK Senparc.Weixin is a comprehensive C# SDK for all WeChat platforms, covering Official Accounts, Mini Programs, Mini Games, WeChat Pay, WeCom… | 96 | 8906 | active |
| Strands Agents Strands Agents is an open-source SDK (Python and TypeScript) for building production AI agents with a model-driven approach, supporting any… | 83 | 8884 | active |
| redpanda-data/connect Redpanda Connect (formerly Benthos) is a declarative stream processor that moves data between hundreds of sources and sinks with transforma… | 95 | 8790 | active |
| apache/beam Apache Beam is an open-source unified programming model and SDK set (Java, Python, Go, SQL, TypeScript) for defining batch and streaming da… | 95 | 8688 | stable |
| MariaDB Server MariaDB Server is a widely deployed open-source relational database (SQL server) forked from MySQL by its original developers, licensed und… | 98 | 8403 | stable |
| fluent/fluent-bit Fluent Bit is a fast, lightweight telemetry agent written in C that collects, processes, and forwards logs, metrics, and traces from any so… | 100 | 8163 | stable |
| hatchet-dev/hatchet Hatchet is an open-source (MIT) orchestration engine for background tasks, AI agents, and durable workflows, available as a cloud service o… | 90 | 8158 | active |
| Flyte Flyte is an open-source workflow orchestration platform for coordinating data, ML models, and AI agents at scale, authored in pure Python a… | 96 | 7741 | active |
| mozilla/sccache Sccache is a ccache-like compiler caching tool that wraps compilers to avoid redundant compilation, storing results locally or in cloud sto… | 93 | 7716 | active |
| OpenTelemetry Collector The OpenTelemetry Collector is a vendor-agnostic telemetry pipeline service that receives, processes, and exports traces, metrics, and logs… | 100 | 7686 | stable |
| H2O H2O-3 is an open-source, distributed, in-memory machine learning platform implementing algorithms such as GLM, GBM/XGBoost, Random Forest, … | 75 | 7509 | stable |
| fabiolb/fabio Fabio is an HTTP, HTTPS, TCP, and gRPC reverse proxy and load balancer that configures itself dynamically from service data stored in Consu… | 93 | 7346 | active |
| Lance Lance is an open lakehouse data format (file format, table format, and catalog spec) for multimodal AI, implemented in Rust with Python and… | 99 | 7182 | active |
| Apache CouchDB Apache CouchDB is an open-source NoSQL document database written in Erlang that stores data as JSON documents and exposes an intuitive HTTP… | 76 | 6971 | stable |
| Shuttle Shuttle is a Rust-native cloud development platform and framework that lets developers build and deploy backends without writing infrastruc… | 10 | 6926 | active |
| ClearML ClearML is an open-source Python SDK and platform for MLOps/LLMOps that provides auto-logged experiment tracking, data versioning, pipeline… | 96 | 6903 | stable |
| AWS Serverless Application Model (SAM) AWS SAM CLI is an open-source command-line tool for building, locally testing, debugging, and deploying serverless applications defined wit… | 99 | 6737 | active |
| Flagsmith Flagsmith is an open-source feature flagging and remote configuration service that lets teams toggle features on and off, segment users, an… | 95 | 6590 | active |
| Spin Spin is an open-source framework and CLI for building, deploying, and running event-driven serverless microservices as WebAssembly componen… | 100 | 6540 | active |
| Apache IoTDB Apache IoTDB is an open-source time-series database management system designed for industrial IoT, providing integrated collection, storage… | 94 | 6420 | stable |
| Aspire Aspire is a multi-language, code-first toolchain from Microsoft for composing, running, debugging, and deploying distributed applications. … | 96 | 6380 | active |
| Harbor Harbor is a Python framework from the creators of Terminal-Bench for evaluating and optimizing AI agents and language models in containeriz… | 86 | 6348 | active |
| vllm-project/semantic-router vLLM Semantic Router is an open-source programmable routing and control layer for building Mixture-of-Models systems across heterogeneous L… | 80 | 6243 | active |
| HelixDB/helix-db HelixDB is an open-source OLTP graph-vector database written in Rust that combines labeled property graphs with native vector, full-text, a… | 84 | 6205 | active |
| BrowserAct BrowserAct Skills is a Python-based browser automation CLI designed for AI agents, providing real-browser control with anti-bot evasion (st… | 57 | 6118 | active |
| cloud-custodian/cloud-custodian Cloud Custodian (c7n) is a Python-based stateless rules engine for managing public cloud accounts and resources via YAML policy DSLs with f… | 95 | 6088 | stable |
| Inngest Inngest is an event-driven durable execution platform for running stateful step functions and AI workflows on serverless, servers, or the e… | 95 | 5968 | active |
| data load tool (dlt) dlt (data load tool) is an open-source Python library for building ELT data pipelines that extract data from REST APIs, SQL databases, clou… | 99 | 5955 | stable |
| OpenFGA OpenFGA is a high-performance, open-source fine-grained authorization and permission engine inspired by Google's Zanzibar, owned by the CNC… | 97 | 5846 | stable |
| AidLux (AidLearning) AidLux (originally AidLearning) is an AIoT development platform that runs a native Ubuntu Linux environment with GUI, deep learning tooling… | 63 | 5812 | active |
| agentscope-ai/AgentTeams AgentTeams is an open-source collaborative multi-agent runtime platform that orchestrates multiple Agent containers using a Manager-Workers… | 81 | 5698 | active |
| tsuru Tsuru is an open-source, extensible Platform as a Service (PaaS) that simplifies application deployment and management on top of Kubernetes… | 96 | 5311 | active |
| eksctl-io/eksctl eksctl is the official command-line tool for creating and managing Amazon EKS (Elastic Kubernetes Service) clusters, written in Go and buil… | 98 | 5214 | active |
| Taubyte Tau Taubyte (tau) is an open-source, self-hosted fullstack cloud platform that lets developers and AI coding agents build, test, and ship appli… | 74 | 5174 | active |
| OpenTelemetry Collector The contrib repository for the OpenTelemetry Collector, containing 200+ vendor-neutral components (receivers, processors, exporters) for re… | 100 | 5009 | active |
| flipt-io/flipt Flipt is a self-hosted, Git-native feature flag management platform that stores flags as code in your own Git repositories and evaluates th… | 99 | 4917 | stable |
| macro-inc/macro Macro is an open-source all-in-one team workspace that unifies email, chat, docs, tasks, calls, CRM, and AI agents into a single fast inter… | 81 | 4810 | active |
| Azure/azure-powershell The official Microsoft Azure PowerShell module (Az) providing cmdlets to develop, deploy, and administer Azure resources. It supports authe… | 99 | 4806 | active |
| Aimeos Aimeos is a full-featured, open-source PHP e-commerce framework that integrates with Laravel, Symfony, and TYPO3 to build online shops, mar… | 76 | 4537 | stable |
| CrateDB CrateDB is a distributed, horizontally scalable SQL database built on Lucene, designed for real-time analytics on massive datasets. It supp… | 95 | 4444 | active |
| Boundary HashiCorp Boundary is an identity-aware proxy that provides secure, least-privilege access to hosts and critical systems across clouds and … | 10 | 4067 | active |
| helm/chartmuseum ChartMuseum is an open-source Helm Chart Repository server written in Go that serves Helm charts and provides an API for uploading, listing… | 88 | 3850 | active |
| qkqpttgf/OneManager-php A PHP-based index and file manager for OneDrive/SharePoint that can be deployed to serverless platforms like Vercel, Huawei FG, Aliyun FC, … | 55 | 3795 | active |
| Polyaxon Polyaxon is an open-source AI engineering control plane that teams self-host on their own Kubernetes clusters to schedule, track, and gover… | 75 | 3735 | active |
| AWS SDK for JavaScript The official modular AWS SDK for JavaScript (v3), offering TypeScript-first client packages for each AWS service with a configurable middle… | 96 | 3676 | stable |
| Athou/commafeed CommaFeed is a self-hosted RSS feed reader inspired by Google Reader, built with Quarkus (Java) and React/TypeScript. It supports thousands… | 97 | 3629 | active |
| slatedb/slatedb SlateDB is an embedded key-value storage engine implemented in Rust as a log-structured merge-tree (LSM) that persists all data to object s… | 91 | 3458 | active |
| FairwindsOps/polaris Polaris is an open source policy engine for Kubernetes that validates and remediates resource configuration against 30+ built-in best-pract… | 97 | 3396 | active |
| Storj Storj is a decentralized, S3-compatible cloud object storage network that encrypts files, splits them into pieces, and distributes them acr… | 95 | 3283 | active |
| lakesoul-io/LakeSoul LakeSoul is a cloud-native, real-time lakehouse framework with a Rust-native core providing ACID table format, concurrent upserts, incremen… | 98 | 3257 | active |
| microsoft/retina Retina is an open-source, eBPF-based Kubernetes network observability platform that collects customizable telemetry, Prometheus metrics, an… | 94 | 3179 | active |
| blockchain-etl/ethereum-etl A Python CLI tool that extracts Ethereum blockchain data (blocks, transactions, token transfers, logs, traces, contracts) and exports it to… | 48 | 3131 | active |
| Barre/ZeroFS ZeroFS is a log-structured filesystem written in Rust that turns S3-compatible object storage (Amazon S3, GCS, Azure Blob, or any S3-compat… | 80 | 3125 | active |