Open-source api-framework software
2097 open-source libraries, tools and applications tagged api-framework, ranked by how closely api-framework 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.
2097 products, primary matches first, then adoption-weighted; health v2 shown.
| Product | Health v2 | Stars | Maturity |
|---|---|---|---|
| ellite/Wallos Wallos is an open-source, self-hostable web application for tracking personal subscriptions and recurring expenses. It offers category mana… | 89 | 8668 | active |
| Oat++ Oat++ is a light, zero-dependency C++ web framework for building highly scalable and resource-efficient web applications and REST APIs. It … | 42 | 8650 | 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 | 8521 | active |
| OGX OGX (formerly Llama Stack) is an open-source, OpenAI-compatible agentic API server and Python library that bundles inference, vector stores… | 87 | 8441 | active |
| mockoon/mockoon Mockoon is a free, open-source desktop application (built with Electron) for designing and running mock REST APIs locally, with a companion… | 92 | 8416 | active |
| javalin/javalin Javalin is a lightweight, simple web framework for Java and Kotlin built on top of Jetty, supporting REST APIs, WebSockets, static file ser… | 96 | 8368 | active |
| CompreFace Exadel CompreFace is a free, open-source face recognition system that provides REST APIs for face recognition, verification, detection, lan… | 23 | 8344 | stable |
| rpcx rpcx is a high-performance distributed RPC framework for Go, comparable to Alibaba Dubbo but designed natively for Go without requiring pro… | 75 | 8319 | active |
| smartcontractkit/chainlink Chainlink is the core node software of a decentralized oracle network that bridges smart contracts with real-world data and off-chain compu… | 99 | 8246 | stable |
| openedx/openedx-platform Open edX Platform is the open-source Learning Management System (LMS) and Studio (CMS) that powers online course delivery and authoring at … | 66 | 8193 | active |
| YaoApp/yao Yao Agents is a self-hosted, AI-native platform for running AI agents and workspaces across your own devices, with a task board, isolated w… | 95 | 8140 | active |
| InternLM/lmdeploy LMDeploy is a toolkit for compressing, quantizing, deploying, and serving large language models, built around its high-performance TurboMin… | 96 | 8111 | active |
| lm-sys/FastChat FastChat is an open platform for training, serving, and evaluating large language model based chatbots, originally releasing the Vicuna mod… | 53 | 39548 | maintenance |
| 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 |
| App Store Connect CLI A fast, scriptable command-line tool written in Go for the App Store Connect API, covering TestFlight, builds, submissions, signing, metada… | 79 | 7935 | active |
| adithya-s-k/omniparse OmniParse is a self-hosted ingestion and parsing platform that converts unstructured data (documents, images, audio, video, web pages) into… | 46 | 7932 | active |
| Elsa Workflows Elsa Workflows is a workflow engine library for .NET that lets applications execute workflows defined in C# code, JSON, or via a visual des… | 99 | 7908 | active |
| Dolibarr ERP & CRM Dolibarr ERP & CRM is an open-source web application written in PHP that manages business activities including contacts, quotes, invoices, … | 98 | 7761 | 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 |
| apache/caldera Apache Caldera is a cybersecurity platform for automated adversary emulation built on the MITRE ATT&CK framework. It provides an asynchrono… | 75 | 7317 | active |
| vLLM vLLM-Omni is a Python framework extending vLLM for efficient inference and serving of omni-modality models, including diffusion transformer… | 84 | 7293 | active |
| Civitai Platform Civitai is a web platform for sharing, discovering, and discussing Stable Diffusion models, textual inversions, LoRAs, VAEs, and other gene… | 77 | 7284 | 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 |
| NVIDIA-NeMo/Guardrails NVIDIA NeMo Guardrails is an open-source Python toolkit for adding programmable guardrails to LLM-based conversational applications. It sit… | 90 | 7181 | active |
| SpiceDB SpiceDB is an open-source, Google Zanzibar-inspired database for storing, computing, and validating fine-grained authorization data at scal… | 97 | 7124 | stable |
| OpenSignLabs/OpenSign OpenSign is a free, open-source document e-signing application and DocuSign alternative built with React, Node.js, and MongoDB. It supports… | 88 | 7023 | active |
| SimpleLogin SimpleLogin is an open-source email aliasing service that lets users create unique aliases to receive and send emails without exposing thei… | 93 | 7012 | active |
| SuanmoSuanyangTechnology/MemoryBear MemoryBear is an AI memory management system that gives LLM agents and chatbots human-like long-term memory across a full lifecycle of perc… | 83 | 7009 | active |
| wger wger is a self-hosted, open-source fitness manager for tracking workout routines, nutrition, body weight, and measurements, with a built-in… | 92 | 6999 | active |
| deeppavlov/DeepPavlov DeepPavlov is an open-source Python NLP library built on PyTorch and Hugging Face transformers for developing, training, and deploying stat… | 35 | 6995 | active |
| SpringBlade SpringBlade is an enterprise-grade microservices development platform built on Spring Boot 4, Spring Cloud 2025, and Java 21, with a compan… | 92 | 6944 | active |
| hyperf/hyperf Hyperf is a high-performance PHP coroutine framework built on Swoole and Swow, designed for building microservices, middleware, web systems… | 99 | 6905 | active |
| FullStackHero .NET Starter Kit A production-grade .NET 10 starter kit template combining a modular-monolith Web API (vertical slice architecture) with two React 19 front-… | 81 | 6814 | active |
| Apache OpenWhisk Apache OpenWhisk is an open source distributed serverless (FaaS) cloud platform that executes functions in response to events at any scale … | 65 | 6802 | active |
| Faraday Faraday is an open-source vulnerability management platform that aggregates, normalizes, and deduplicates findings from over 90 security to… | 98 | 6781 | active |
| CloudFlare ImgBed CloudFlare ImgBed is an open-source, self-hosted image and file hosting application deployable on Cloudflare Pages/Workers (serverless) or … | 86 | 6750 | active |
| microsoft/call-center-ai An AI-powered call center service that lets you initiate or receive phone calls handled by an LLM-driven agent via a simple API call. Built… | 65 | 6683 | active |
| JetLinks IoT Platform JetLinks is an open-source, fully reactive enterprise IoT platform built on Java 17, Spring Boot 3.x, WebFlux, Netty, and Reactor. It provi… | 69 | 6658 | active |
| j3ssie/osmedeus Osmedeus is a security-focused declarative orchestration engine that lets users define reconnaissance and vulnerability-scanning pipelines … | 94 | 6602 | 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 |
| airweave-ai/airweave Airweave is an open-source context retrieval layer that connects to apps, databases, and documents and exposes their data through a single … | 10 | 6558 | active |
| thedevdojo/wave Wave is an open-source SaaS starter kit and framework built on Laravel, Livewire, and Tailwind CSS. It ships with authentication, billing a… | 79 | 6552 | active |
| StackStorm StackStorm is an open-source event-driven automation platform ('IFTTT for Ops') that ties together services and tools via sensors, triggers… | 73 | 6545 | active |
| Micronaut Micronaut is a modern, JVM-based full-stack framework for building modular, easily testable applications and microservices in Java, Kotlin,… | 96 | 6437 | stable |
| Hanami Hanami is a full-stack, modular Ruby web framework composed of small single-purpose libraries (router, actions, views, database, assets) ti… | 97 | 6426 | active |
| jsdelivr/jsdelivr jsDelivr is a free, production-grade public CDN for open-source files, tightly integrated with npm and GitHub, offering on-the-fly minifica… | 76 | 6401 | stable |
| moleculerjs/moleculer Moleculer is a fast, progressive microservices framework for Node.js that helps build efficient, reliable, and scalable distributed service… | 90 | 6376 | stable |
| Apache Camel Apache Camel is an open-source integration framework offering 350+ connectors for databases, APIs, message brokers, and cloud services, wit… | 77 | 6371 | stable |
| Valhalla Routing Engine Valhalla is an open source routing engine and set of libraries built on OpenStreetMap data, written in C++. It provides turn-by-turn direct… | 93 | 6275 | active |
| nlweb-ai/NLWeb NLWeb is an open protocol and Python reference implementation for adding natural language conversational interfaces to websites, leveraging… | 60 | 6254 | active |
| JimmyLv/BibiGPT-v1 BibiGPT is an AI-powered web application that summarizes videos and audio from platforms like Bilibili, YouTube, TikTok, and podcasts, gene… | 54 | 6241 | active |
| lightdash/lightdash Lightdash is an open-source, agentic business intelligence platform that lets data teams define governed metrics, dashboards, AI agents, an… | 96 | 6198 | active |
| Mall4j Mall4cloud is an open-source (AGPLv3) microservices-based B2B2C e-commerce mall system built on Spring Boot 4, Spring Cloud, Nacos, Seata, … | 78 | 6157 | active |
| baserow/baserow Baserow is an open-source, no-code platform for building databases, applications, automations, dashboards, and AI agents, positioned as an … | 98 | 6094 | active |
| Austin Austin is a unified message push platform written in Java (Spring Boot) that sends notifications across channels such as email, SMS, WeChat… | 67 | 6089 | active |
| arp242/goatcounter GoatCounter is an open-source, privacy-friendly web analytics platform available as a free hosted service or a self-hosted Go application, … | 71 | 6041 | active |
| truefoundry/trueforge TrueForge is an open-source agent harness that provides the runtime layer turning an LLM into a working agent, with MCP tools, skills, sand… | 79 | 6032 | active |
| CodeIgniter 4 CodeIgniter 4 is a lightweight, full-stack PHP web framework with a small footprint, MVC architecture, and built-in security features like … | 94 | 5985 | active |
| 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 |
| fullstorydev/grpcui grpcui is a command-line tool that launches an interactive browser-based web UI for invoking and testing gRPC services, similar to Postman … | 89 | 5928 | active |
| mostlygeek/llama-swap A Go-based proxy service that lets you run multiple local AI inference servers (llama.cpp, vllm, ComfyUI, etc.) and hot-swap between models… | 86 | 5922 | active |
| Countly Countly is a privacy-first, self-hostable product analytics and customer engagement platform with dashboards, crash reporting, push notific… | 94 | 5914 | active |
| cortexproject/cortex Cortex is a horizontally scalable, highly available, multi-tenant long-term storage backend for Prometheus and OpenTelemetry metrics. It ru… | 88 | 5877 | 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 |
| Klavis-AI/klavis Klavis AI is an open-source MCP (Model Context Protocol) integration platform that lets AI agents connect to 100+ prebuilt tool integration… | 59 | 5814 | active |
| 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 |
| kanbn/kan Kan is an open-source, self-hostable kanban project management application positioned as a Trello alternative. It offers boards, cards, lab… | 80 | 5779 | active |
| letsencrypt/boulder Boulder is the Go implementation of an ACME-based certificate authority that powers Let's Encrypt. It automates domain validation and issua… | 95 | 5764 | 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 |
| dromara/lamp-cloud lamp-cloud is a Java-based microservices rapid development platform built on Spring Boot and Spring Cloud, focused on multi-tenant (SaaS) a… | 76 | 5758 | active |
| serge-chat/serge Serge is a self-hosted web chat interface for running LLMs locally via llama.cpp, built with a SvelteKit frontend and FastAPI backend. It s… | 10 | 5709 | active |
| tModLoader/tModLoader tModLoader is an open-source, community-driven modding API and mod loader for the game Terraria, distributed as a free Steam app. It lets p… | 98 | 5703 | active |
| OWASP/Nettacker OWASP Nettacker is a Python-based automated penetration testing and information-gathering framework for reconnaissance, vulnerability scann… | 84 | 5616 | active |
| openemr/openemr OpenEMR is the most popular open-source electronic health records (EHR) and medical practice management application, written in PHP. It off… | 99 | 5530 | stable |
| useplunk/plunk Plunk is an open-source, self-hostable email platform combining transactional email sending (API and SMTP), marketing campaigns, and event-… | 89 | 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 |
| graphql-ruby graphql-ruby is a Ruby implementation of the GraphQL specification for building GraphQL server APIs in Ruby and Rails applications. It prov… | 68 | 5445 | 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 |
| TaskingAI/TaskingAI TaskingAI is an open-source Backend-as-a-Service (BaaS) platform for developing and deploying LLM-based AI agents. It unifies access to hun… | 17 | 5406 | active |
| AG2 FastStream is an asynchronous Python framework for building event-driven applications on top of message brokers like Kafka, RabbitMQ, NATS,… | 98 | 5361 | active |
| QOR QOR is a set of modular Go libraries that abstract common features needed for building business applications, CMSs, and e-commerce systems,… | 64 | 5345 | 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 |
| 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 |
| Blog.Core Blog.Core is an open-source, enterprise-ready ASP.NET Core 8.0 Web API framework with a companion Vue frontend, implementing repository + s… | 63 | 5286 | active |
| grafana/mimir Grafana Mimir is an open source, horizontally scalable, highly available, multi-tenant time series database providing long-term storage for… | 99 | 5259 | active |
| Restreamer Datarhei Restreamer is a self-hosted live video streaming server with a web UI, built on FFmpeg and distributed as a Docker image. It inges… | 57 | 5216 | active |
| rajnandan1/kener Kener is an open-source, self-hosted status page and uptime monitoring application built with SvelteKit. It tracks multiple service types (… | 86 | 5178 | active |
| mediacms-io/mediacms MediaCMS is an open source, self-hosted video and media CMS built with Django and React, exposing a REST API. It supports video, audio, ima… | 100 | 5161 | active |
| mathesar-foundation/mathesar Mathesar is a self-hosted web application providing a spreadsheet-like interface for viewing, editing, querying, and collaborating on Postg… | 90 | 5157 | active |
| Armeria Armeria is a JVM microservice framework built on Netty that lets you serve gRPC, Thrift, REST, and static files on a single port. It provid… | 99 | 5148 | stable |
| tencentmusic/supersonic SuperSonic is an AI+BI platform that combines Chat BI (natural language querying powered by LLMs) with Headless BI (a governed semantic lay… | 62 | 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… | 94 | 5108 | active |
| stoplightio/prism Prism is an open-source CLI tool that turns OpenAPI v2/v3 documents or Postman Collections into a fully functional HTTP mock server with dy… | 93 | 5043 | active |
| trace.moe trace.moe is an anime scene search engine that identifies which anime, episode, and exact timestamp a screenshot comes from. This repositor… | 75 | 5034 | active |
| DefectDojo DefectDojo is an open-source vulnerability management, DevSecOps, and ASPM platform built on Django. It aggregates findings from hundreds o… | 96 | 5024 | active |
| Emby Emby Server is a self-hosted personal media server that organizes videos, music, photos, and live TV into a rich library and streams them t… | 23 | 5002 | active |
| ddnexus/pagy Pagy is a fast, framework-agnostic pagination library written in plain Ruby. It supports multiple pagination techniques (OFFSET, COUNTLESS,… | 98 | 4994 | active |
| dpgaspar/Flask-AppBuilder Flask-AppBuilder is a rapid application development framework built on top of Flask, providing automatic CRUD generation for SQLAlchemy mod… | 97 | 4962 | stable |
| withcoral/coral Coral is a local SQL query engine that exposes APIs, files, and live data sources as read-only tables you can query and join with standard … | 79 | 4943 | 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 |