Open Source Projects using JavaScript
A curated collection of the 717 best open source software using JavaScript. Find the most popular and trending open source projects to learn from, contribute to, or use in your own projects.
LLM-ready web crawler built for AI data pipelines
Stars
86,137Last commit
2 days agoLicense
Apache-2.0
Open-source web crawler and scraper that produces clean, structured output optimized for LLMs, RAG pipelines, and AI agents. Supports async crawling, CSS/XPath/LLM extraction, and stealth browser control.
Open Source Alternative to:
Manage, build, and run AI agent teams around the clock
Stars
83,457Last commit
4 hours agoLicense
Unknown
A collaborative platform to create, schedule, and operate AI agents that handle long-running tasks, team workflows, and automated jobs without constant oversight.
Open Source Alternative to:
High-performance code editor built for speed and AI
Stars
92,117Last commit
9 hours agoLicense
GPL-3.0
A Rust-built code editor from the creators of Atom and Tree-sitter, combining native performance with multiplayer collaboration and deep AI integration.
Open Source Alternative to:
Self-hosted uptime monitoring with a clean dashboard
Stars
92,814Last commit
5 hours agoLicense
MIT
Monitors websites, APIs, and services with real-time alerts, a status page, and support for dozens of notification channels. Self-hosted and Docker-friendly.
Open Source Alternative to:
Hyperextensible, Lua-powered Vim-based text editor
Stars
103,142Last commit
7 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:
Open-source AI coding agent for your editor and terminal
Stars
70,798Last commit
5 hours agoLicense
Apache-2.0
AI coding agent that runs inside VS Code and the terminal, supporting multi-file edits, bash execution, and any LLM provider via bring-your-own-key.
Open Source Alternative to:
Text-based diagramming that renders in code and docs
Stars
90,836Last commit
12 hours agoLicense
MIT
Create flowcharts, sequence diagrams, Gantt charts, and more using a simple Markdown-like syntax that renders anywhere.
Open Source Alternative to:
The leading distributed search and analytics engine
Stars
78,355Last commit
4 hours agoLicense
Unknown
Elasticsearch is an open-source, RESTful search engine designed for scalability, reliability, and easy management.
Open Source Alternative to:
AI workspace for docs, projects, and wikis you control
Stars
77,699Last commit
3 days agoLicense
AGPL-3.0
Open source collaborative workspace combining notes, databases, and AI with full data ownership, offline support, and self-hosting options.
Open Source Alternative to:
AI-powered analytics workspace built for investment teams
Stars
74,602Last commit
4 hours agoLicense
AGPL-3.0
Connects proprietary, licensed, and public financial data with AI agents in a self-hostable workspace for asset managers, hedge funds, and banks.
Open Source Alternative to:
Docs, whiteboards, and databases in one privacy-first workspace
Stars
73,781Last commit
1 day agoLicense
MIT
An open-source, local-first knowledge base that merges structured docs, infinite whiteboards, databases, and AI into a single workspace for teams and creators.
Open Source Alternative to:
Self-serve data exploration and dashboard builder
Stars
75,283Last commit
4 hours agoLicense
Apache-2.0
Connect any SQL database, build charts with drag-and-drop or raw SQL, and publish interactive dashboards without writing application code.
Open Source Alternative to:
Persistent memory layer for AI agents and apps
Stars
67,722Last commit
17 hours agoLicense
Apache-2.0
Adds persistent, searchable memory to AI agents and apps, so they remember user preferences and past interactions across sessions without pipeline changes.
Open Source Alternative to:
Sleek, intuitive API development and testing platform
Stars
80,678Last commit
1 day 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:
Chat with your documents using any LLM, fully private
Stars
67,500Last commit
10 hours agoLicense
MIT
A desktop and self-hostable AI app for chatting with documents, running local LLMs, and using AI agents without writing code or creating an account.
Open Source Alternative to:
LLM gateway for auth, load balancing, and spend tracking
Stars
Stars growing over the last 30 days61,941Last commit
4 hours agoLicense
Unknown
Acts as a unified proxy across 100+ LLMs, normalizing them to the OpenAI format while handling virtual keys, budgets, rate limits, fallbacks, and cost tracking.
Open Source Alternative to:
Project management for teams mixing humans and AI agents
Stars
Stars growing over the last 30 days53,687Last commit
8 hours agoLicense
Unknown
Open-source platform that manages coding agents as team members, with task queues, skill libraries, runtime monitoring, and a unified activity feed.
Open Source Alternative to:
Unified observability for metrics, logs, traces, and more
Stars
77,470Last commit
5 hours agoLicense
AGPL-3.0
Grafana unifies metrics, logs, traces, profiles, and business data into one OpenTelemetry-native platform with AI-assisted root cause analysis and adaptive cost controls.
Open Source Alternative to:
Coding agent that runs on local and open-weight models
Stars
68,652Last commit
13 days agoLicense
Apache-2.0
Coding agent that lets LLMs write and execute code, manage files, and control your computer using local or low-cost models.
Open Source Alternative to:
An independent browser engine built from scratch, not a fork
Stars
66,649Last commit
4 hours agoLicense
BSD-2-Clause
Open source web browser with its own engine, built from scratch without Blink, WebKit, or Gecko. Non-profit backed, no search deals, no user monetization.
Open Source Alternative to:
Self-hosted AI agent for chat, automation, and workflows
Stars
49,318Last commit
9 hours agoLicense
MIT
Lightweight, self-hosted AI agent that runs in a web UI, terminal, or chat app, handling long-running workflows with controlled token budgets.
Open Source Alternative to:
All-in-one business platform covering ERP, CRM, and more
Stars
55,289Last commit
4 hours agoLicense
Unknown
Integrated suite of business apps covering accounting, CRM, inventory, eCommerce, HR, and project management, available free as Community or paid Enterprise edition.
Open Source Alternative to:
Project management for teams and AI agents
Stars
61,353Last commit
20 hours agoLicense
AGPL-3.0
Open source project management platform combining issues, wikis, and AI agents in one workspace. Available on cloud, self-hosted, and air-gapped deployments.
Open Source Alternative to:
Build a custom CRM without the proprietary lock-in
Stars
Stars growing over the last 30 days59,619Last commit
5 hours agoLicense
AGPL-3.0
Self-hostable CRM built for technical teams who need a fully customizable, extensible platform without vendor lock-in or proprietary tooling.
Open Source Alternative to:
Real-time monitoring for systems and applications
Stars
81,113Last commit
12 hours agoLicense
GPL-3.0
Powerful, efficient, and user-friendly monitoring solution for servers, containers, and applications with instant insights and alerts.
Open Source Alternative to:
Headless CMS with REST and GraphQL APIs out of the box
Stars
73,369Last commit
18 hours 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 timeline for quick notes, logs, and snippets
Stars
64,031Last commit
4 hours agoLicense
MIT
Memos is a self-hosted, open-source note-taking app built around a private timeline. Write in Markdown, skip the folder setup, and keep your data on your own server.
Open Source Alternative to:
A modern terminal built around AI coding agents
Stars
65,670Last commit
20 hours agoLicense
AGPL-3.0
Terminal built for running AI coding agents like Claude Code, Codex, and Gemini CLI, with shared context, interactive code review, and multi-session management.
Open Source Alternative to:
General-purpose AI agent for code, workflows, and more
Stars
55,613Last commit
18 hours agoLicense
Apache-2.0
Local AI agent with a desktop app, CLI, and API that connects to 15+ LLM providers and 70+ extensions for code, research, automation, and data tasks.
Open Source Alternative to:
Deploy apps, databases, and services to your own server
Stars
63,637Last commit
5 hours agoLicense
Apache-2.0
Self-hostable deployment platform that lets you deploy apps, databases, and 280+ one-click services to any server via SSH, with Git integration and automatic SSL.
Open Source Alternative to:
Run open-source AI models privately on your own device
Stars
77,353Last commit
1 year agoLicense
MIT
GPT4All runs open-source language models locally on Windows, macOS, and Linux with no cloud dependency, keeping your data on your machine.
Open Source Alternative to:
Open-source backend in a single file
Stars
61,573Last commit
24 hours agoLicense
MIT
A lightweight, self-hosted backend solution with real-time database, authentication, and file storage capabilities.
Open Source Alternative to:
Open source metrics collection, storage, and alerting
Stars
66,727Last commit
9 hours agoLicense
Apache-2.0
Pull-based monitoring system with a multi-dimensional data model, PromQL query language, built-in alerting, and a time series database built for cloud native environments.
Open Source Alternative to:
Multi-model AI desktop client with local-first privacy
Stars
52,930Last commit
4 hours agoLicense
AGPL-3.0
Desktop AI client for Windows, macOS, and Linux that connects 300+ models from 50+ providers, with local storage, a built-in knowledge base, and autonomous agent mode.
Open Source Alternative to:
Transform databases into intuitive spreadsheets instantly
Stars
65,341Last commit
5 hours agoLicense
AGPL-3.0
Convert any database into a no-code platform with spreadsheet interface. Connect PostgreSQL/MySQL or use hosted database. Scale to millions of rows effortlessly.
Open Source Alternative to:
Self-host your own scheduling page, no vendor required
Stars
49,270Last commit
5 days agoLicense
MIT
Cal.diy is the community edition of Cal.com for personal self-hosting, with calendar sync, video conferencing, payment support, and a REST API.
Open Source Alternative to:
One interface for all your AI models and conversations
Stars
Stars growing over the last 30 days46,238Last commit
4 hours agoLicense
MIT
Chat with multiple AI providers through a single self-hostable interface, with support for custom agents, file uploads, plugins, and multi-user access control.
Open Source Alternative to:
Open-source backend platform for rapid app development
Stars
57,762Last commit
14 hours agoLicense
BSD-3-Clause
Open-source development platform with built-in backend infrastructure, web hosting, and security features. Scale applications using your preferred programming languages.
Open Source Alternative to:
Self-hosted Git service for seamless collaboration
Stars
58,669Last commit
6 hours agoLicense
MIT
A lightweight, fast, and customizable Git service that simplifies code hosting and collaboration for teams of all sizes.
Open Source Alternative to:
Self-hosted AI runtime for text, voice, vision, and agents
Stars
49,903Last commit
5 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:
Open-source UI design and prototyping for product teams
Stars
61,566Last commit
14 hours agoLicense
MPL-2.0
Design, prototype, and hand off to developers in one platform. Supports design systems, tokens, flexible layouts, and AI workflows with real CSS/HTML output.
Open Source Alternative to:
Personal AI agent for messaging apps, containerized
Stars
31,006Last commit
11 hours agoLicense
MIT
Self-hosted AI agent that connects to WhatsApp, Telegram, Slack, and a dozen more messaging apps, running each agent in an isolated Docker container with credential injection via a secure vault.
Open Source Alternative to:
InfluxDB – The purpose-built time series platform for high-velocity ingestion and real-time queries at scale.
Openlane
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