Open Source Projects tagged "Api"
A curated collection of the best open source projects tagged "Api". Each listing includes a website screenshot along with a detailed review of its features.
Continuous compliance automation for SOC 2, ISO 27001 & more
Stars
Stars growing over the last 30 days339Last commit
6 hours agoLicense
Apache-2.0
Automates evidence collection, control tracking, and audit reporting across SOC 2, ISO 27001, NIST 800-53, GDPR, and 12+ other frameworks in one platform.
Open Source Alternative to:
Hyperextensible, Lua-powered Vim-based text editor
Stars
103,654Last commit
4 hours agoLicense
Unknown
A modernized Vim fork with built-in LSP, Lua scripting, Tree-sitter parsing, and an async plugin architecture that works the same across every platform.
Open Source Alternative to:
Sleek, intuitive API development and testing platform
Stars
80,819Last commit
11 days agoLicense
MIT
Lightweight, fast, and feature-rich API client for developers. Test, debug, and document APIs with ease in a clean, modern interface.
Open Source Alternative to:
Headless CMS with REST and GraphQL APIs out of the box
Stars
73,494Last commit
2 days agoLicense
MIT
TypeScript headless CMS that generates REST and GraphQL APIs from your content model, with a no-code builder, plugin system, and full self-hosting support.
Open Source Alternative to:
Self-hosted AI runtime for text, voice, vision, and agents
Stars
50,377Last commit
4 hours agoLicense
MIT
Run LLMs, speech, image generation, and autonomous agents on your own hardware with an OpenAI-compatible API and 60+ swappable backends.
Open Source Alternative to:
Lightning-fast search for your applications
Stars
59,866Last commit
3 days agoLicense
MIT
A powerful, fast, and easy-to-use search engine that delivers instant and relevant results for your websites and applications.
Open Source Alternative to:
Powerful API development and testing made effortless
Stars
40,159Last commit
2 days agoLicense
Apache-2.0
Intuitive API client for REST, GraphQL, and gRPC. Debug, test, and collaborate on APIs with ease across platforms.
Open Source Alternative to:
Open-source data platform for effortless content management
Stars
38,725Last commit
2 days agoLicense
Unknown
A versatile headless CMS and API engine that simplifies data management, content creation, and application development.
Open Source Alternative to:
Automate any website workflow with AI and computer vision
Stars
23,424Last commit
15 hours agoLicense
AGPL-3.0
Transform manual browser tasks into automated workflows using AI. Handle complex forms, CAPTCHAs, 2FA, and data extraction across any website at scale.
Open Source Alternative to:
No-code web scraping, crawling, and extraction platform
Stars
Stars growing over the last 30 days18,465Last commit
7 days agoLicense
AGPL-3.0
Turn any website into structured data using a visual recorder, natural language prompts, or API. Includes proxy rotation, scheduling, and webhook integrations.
Open Source Alternative to:
Secure password management for individuals and businesses
Stars
20,641Last commit
4 hours agoLicense
AGPL-3.0
Bitwarden is an open source password manager that securely stores, shares, and autofills passwords across unlimited devices.
Open Source Alternative to:
Free offline machine translation API you can host yourself
Stars
Stars growing over the last 30 days17,758Last commit
1 day agoLicense
AGPL-3.0
Self-hosted machine translation API that works offline. Download, setup, and run your own translation server in minutes with complete privacy control.
Open Source Alternative to:
High-performance API gateway with built-in LLM support
Stars
17,325Last commit
3 days agoLicense
Apache-2.0
Apache APISIX is an open-source API gateway built on NGINX and etcd, offering dynamic routing, 100+ plugins, load balancing, authentication, and traffic management for APIs and LLM workloads.
Open Source Alternative to:
Open-source API documentation and testing platform
Stars
16,410Last commit
1 day agoLicense
MIT
Scalar is an open-source tool for building, customizing, and hosting interactive API documentation with OpenAPI support.
Open Source Alternative to:
Visual database for workflow automation across apps
Stars
15,667Last commit
2 months agoLicense
AGPL-3.0
AITable.ai offers a visual database platform that simplifies workflow automation and connects to over 6,000 apps through integrations like Zapier and Make.
Open Source Alternative to:
Build product integrations with 500+ APIs in hours
Stars
Stars growing over the last 30 days13,235Last commit
1 day agoLicense
Elastic-2.0
Complete integrations platform with 500+ pre-built APIs, code-first approach, unified data models, and enterprise-grade security. Free tier available.
Open Source Alternative to:
Accelerate backend development with effortless scalability
Stars
12,716Last commit
3 days agoLicense
MPL-2.0
A powerful platform for building cloud backends, automating infrastructure, and simplifying development workflows for faster, more efficient coding.
Open Source Alternative to:
Lightning-fast open source search engine for big data
Stars
12,081Last commit
12 hours agoLicense
GPL-3.0
Open source search database delivering 2.83x faster performance than Elasticsearch. Features vector search, SQL interface, and full-text capabilities.
Open Source Alternative to:
Universal API management for REST, GraphQL, gRPC & async
Stars
10,886Last commit
2 days agoLicense
Unknown
Fast, scalable API management platform with open source gateway, analytics, dev portal and dashboard. Deploy anywhere with AI-ready governance and security.
Open Source Alternative to:
Flexible e-commerce for modern businesses
Stars
8,590Last commit
2 days agoLicense
MIT
A headless, API-first e-commerce framework built on Node.js with TypeScript, offering customization and scalability for online stores.
Open Source Alternative to:
Effortless API mocking for seamless development
Stars
8,484Last commit
10 hours agoLicense
MIT
Create, run, and share mock REST APIs without coding. Boost productivity with an intuitive interface and powerful features.
Open Source Alternative to:
Organize, collaborate, and conquer your tasks
Stars
Stars growing over the last 30 days6,058Last commit
2 days agoLicense
AGPL-3.0
A powerful, open-source task management platform for teams and individuals, offering customizable workflows and seamless integration.
Open Source Alternative to:
Intercept, modify, and debug HTTP(S) requests effortlessly
Stars
6,766Last commit
3 days agoLicense
AGPL-3.0
A powerful browser extension and desktop app for developers to manipulate network requests, debug APIs, and improve web app testing
Open Source Alternative to:
Secure, scalable API key management for developers
Stars
5,482Last commit
7 days agoLicense
AGPL-3.0
Streamline API authentication with UnKey's powerful, developer-friendly platform for creating, revoking, and monitoring API keys.
Open Source Alternative to:
Build reliable AI agents with unified tool integration
Stars
4,937Last commit
14 days agoLicense
Apache-2.0
Platform for connecting AI agents to 500+ tools with built-in multi-tenant auth management and granular permissions using either function calling or a unified MCP server
Open Source Alternative to:
Create stunning data visualizations with ease
Stars
4,096Last commit
2 days agoLicense
MIT
A powerful, open-source platform for building interactive dashboards and charts from multiple data sources without coding.
Open Source Alternative to:
Webhook delivery platform with retries, security, and a portal
Stars
3,481Last commit
2 days agoLicense
MIT
Add customer-facing webhooks to your product without building the infrastructure. Handles retries, signatures, multi-tenancy, filtering, and monitoring at scale.
Open Source Alternative to:
Group chat for friends and communities, without the baggage
Stars
3,468Last commit
1 day agoLicense
Unknown
Self-hostable group chat with servers, channels, voice, and moderation tools. No ads, no data mining, built under EU privacy law.
Open Source Alternative to:
Create, sell, and manage online courses with full control
Stars
Stars growing over the last 30 days2,477Last commit
4 hours agoLicense
AGPL-3.0
Open-source LMS for building and selling courses with a block-based editor, built-in payments, AI tools, analytics, and white-labeling. Self-host or use the cloud.
Open Source Alternative to:
Self-hosted email platform with visual editor & analytics
Stars
2,284Last commit
4 hours agoLicense
AGPL-3.0
Free open-source email platform for newsletters and transactional emails. Self-hosted alternative to Mailchimp with visual MJML editor, A/B testing, and analytics.
Open Source Alternative to:
Modern command-line HTTP client for the API era
Stars
4,052Last commit
2 years agoLicense
BSD-3-Clause
Intuitive, user-friendly CLI tool for making HTTP requests, debugging APIs, and testing web services with ease and efficiency.
Open Source Alternative to:
Build APIs like code with Git-native workspace
Stars
1,819Last commit
3 days agoLicense
Apache-2.0
Offline-first API workspace that unifies specs, docs, tests, and mocks in programmable Markdown blocks. Version control everything in plain text files.
Open Source Alternative to:
Unified API development ecosystem for modern teams
Stars
2,620Last commit
9 months agoLicense
AGPL-3.0
All-in-one platform for API testing, documentation, and collaboration, simplifying the entire API development lifecycle.
Open Source Alternative to:
API management platform for developers and AI agents
Stars
2,131Last commit
4 days agoLicense
Apache-2.0
Open source API management platform that exposes databases as REST, routes microservice traffic, handles billing, and generates SDKs across multiple languages.
Open Source Alternative to:
Self-hosted SERP API for Google, Bing, Yandex, and more
Stars
Stars growing over the last 30 days1,585Last commit
4 days agoLicense
MIT
Query Google, Bing, Yandex, Baidu, DuckDuckGo, and Ecosia through one REST API. Self-host free under MIT, or use the managed cloud option.
Open Source Alternative to:
Flexible billing infrastructure for modern SaaS
Stars
1,360Last commit
4 hours agoLicense
AGPL-3.0
Open-source pricing and billing platform that helps SaaS companies launch, test, and scale complex billing models with ease. Features metering, invoicing, and real-time data.
Open Source Alternative to:
Build AI agents and automate complex workflows seamlessly
Stars
Stars growing over the last 30 days1,063Last commit
4 hours agoLicense
Apache-2.0
Create intelligent automation workflows combining AI agents with your favorite apps and services. Connect, automate, and scale your operations without complex coding.
Open Source Alternative to:
Fast, secure, offline API client for REST and gRPC
Stars
734Last commit
11 days agoLicense
BSD-3-Clause
Cross-platform API client offering fast, secure, and offline testing for REST and gRPC services. Available on macOS, Windows, and Linux with intuitive design.
Open Source Alternative to:
Open-source GraphQL federation platform
Stars
482Last commit
2 days agoLicense
MIT
A fully open-source schema registry, analytics, and gateway for GraphQL federation and APIs
Open Source Alternative to:
Unified API, event, and AI agent management platform
Stars
470Last commit
6 hours agoLicense
Apache-2.0
Full-lifecycle API management platform that unifies synchronous and asynchronous ecosystems. Manage APIs, event streams, and AI agents with enterprise security and 4x faster gateway performance.
Open Source Alternative to:
Self-hosted DAM with fast search and asset workflows
Stars
26Last commit
3 days agoLicense
MIT
Self-hostable digital asset management platform with Elasticsearch-powered search, AI-assisted indexing, granular permissions, and API-first architecture for teams of any size.
Open Source Alternative to:
Postiz – The All-in-One agentic social media scheduling tool
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Windshift
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