Open Source Projects using Express
A curated collection of the 158 best open source software using Express. Find the most popular and trending open source projects to learn from, contribute to, or use in your own projects.
Turn any website into clean, AI-ready data via API
Stars
Stars growing over the last 30 days198,751Last commit
7 hours agoLicense
AGPL-3.0
API for AI agents to search, scrape, crawl, and interact with the live web, returning clean Markdown, structured JSON, or screenshots from any page.
Open Source Alternative to:
Multi-channel notification infrastructure for apps
Stars
40,279Last commit
15 hours agoLicense
Unknown
Open-source platform for building in-app, email, push, SMS, and chat notifications with a unified API, workflow engine, and embeddable inbox component.
Open Source Alternative to:
Passkeys, SSO, and MFA without vendor lock-in
Stars
9,066Last commit
14 hours agoLicense
AGPL-3.0
Open source authentication platform supporting passkeys, 2FA, SSO, and social login. Self-host or use Hanko Cloud, with full control over your data and no lock-in.
Open Source Alternative to:
Cookie-free web and product analytics, self-hostable
Stars
7,256Last commit
2 days agoLicense
AGPL-3.0
Open-source analytics platform covering web traffic, custom events, funnels, retention, session replay, and revenue tracking. GDPR-compliant with optional self-hosting.
Open Source Alternative to:
An AI assistant that acts, not just answers
Stars
393,935Last commit
5 hours agoLicense
MIT
A personal AI assistant that connects to your existing chat apps and handles real tasks like email, calendar, and flight check-ins on your behalf.
Open Source Alternative to:
Desktop AI agent with persistent memory across platforms
Stars
Stars growing over the last 30 days260,680Last commit
5 hours agoLicense
MIT
Cross-platform desktop agent from Nous Research that connects to Telegram, Discord, Slack, WhatsApp, and more, with persistent memory, scheduling, and isolated sandboxing.
Open Source Alternative to:
Build AI agents and automations you can follow step by step
Stars
209,589Last commit
5 hours agoLicense
Unknown
Visual workflow automation platform for building AI agents and business processes, with 500+ integrations, human approval steps, code when needed, and self-hosting.
Open Source Alternative to:
Org chart, budgets, and governance for AI agent teams
Stars
Stars growing quickly over the last 30 days111,212Last commit
5 hours agoLicense
MIT
Manages teams of AI agents across business functions with org charts, goal alignment, cost tracking, ticket tracing, and board-level governance controls.
Open Source Alternative to:
Self-hosted photo and video backup for your own server
Stars
118,281Last commit
5 hours agoLicense
AGPL-3.0
Back up, organize, search, and browse your personal photo and video library on your own server, with no third-party cloud access.
Open Source Alternative to:
Self-hosted uptime monitoring with a clean dashboard
Stars
93,273Last commit
13 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:
Text-based diagramming that renders in code and docs
Stars
91,017Last commit
6 hours agoLicense
MIT
Create flowcharts, sequence diagrams, Gantt charts, and more using a simple Markdown-like syntax that renders anywhere.
Open Source Alternative to:
Docs, whiteboards, and databases in one privacy-first workspace
Stars
74,231Last commit
22 hours 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
75,416Last commit
6 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:
Sleek, intuitive API development and testing platform
Stars
80,754Last 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
67,960Last commit
13 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:
Project management for teams and AI agents
Stars
62,001Last commit
6 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:
General-purpose AI agent for code, workflows, and more
Stars
56,238Last commit
16 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:
Multi-model AI desktop client with local-first privacy
Stars
53,267Last commit
5 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:
One interface for all your AI models and conversations
Stars
Stars growing over the last 30 days46,759Last commit
6 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:
Transform databases into intuitive spreadsheets instantly
Stars
65,433Last commit
17 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:
Open-source UI design and prototyping for product teams
Stars
62,086Last commit
6 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:
Publishing platform for blogs, newsletters, and paid memberships
Stars
55,679Last commit
6 hours agoLicense
MIT
Publish content, send email newsletters, and sell paid subscriptions from one platform. Used by independent journalists, creators, and businesses like YCombinator and Kickstarter.
Open Source Alternative to:
A full desktop environment that runs in your browser
Stars
44,095Last commit
6 hours agoLicense
AGPL-3.0
Puter is a cloud-based desktop OS you run in the browser, with built-in apps, file storage, and support for hosting web apps and sites.
Open Source Alternative to:
Open source payment orchestrator for global transactions
Stars
45,703Last commit
5 hours agoLicense
Apache-2.0
A unified payment infrastructure that connects multiple payment processors through a single API integration, enabling global payment processing
Open Source Alternative to:
Lightweight, fast, and open-source API client for developers
Stars
48,182Last commit
5 hours agoLicense
MIT
A modern, user-friendly API client that simplifies API testing and development with a clean interface and powerful features.
Open Source Alternative to:
Free instant whiteboard with real-time collaboration
Stars
51,255Last commit
18 hours agoLicense
Unknown
Virtual whiteboard that works instantly on any device, no signup required, with real-time multiplayer collaboration built in.
Open Source Alternative to:
Self-hosted team messaging with voice, video, and AI
Stars
46,372Last commit
5 hours agoLicense
MIT
Open source communication platform combining messaging, voice, video, and AI for organizations that need full data control, air-gapped deployments, and zero-trust security.
Open Source Alternative to:
Decentralized social networking in your control
Stars
50,485Last commit
9 hours agoLicense
AGPL-3.0
A free, open-source social media platform that puts users in charge of their data and connections
Open Source Alternative to:
Headless CMS for developers, built with Node.js
Stars
45,674Last commit
10 hours agoLicense
MIT
A powerful, flexible, and developer-friendly content management system that prioritizes customization and scalability.
Open Source Alternative to:
Cultivate vibrant online communities with ease
Stars
48,052Last commit
5 hours agoLicense
GPL-2.0
A powerful, customizable platform for building and managing online forums, fostering engaging discussions and collaborative spaces.
Open Source Alternative to:
Build AI copilots for your product in hours, not months
Stars
38,527Last commit
13 hours agoLicense
MIT
Integrate production-ready AI copilots into any product quickly and easily with CopilotKit's open-source platform.
Open Source Alternative to:
Build internal tools rapidly without coding
Stars
41,196Last commit
5 hours agoLicense
AGPL-3.0
Open-source low-code platform for creating custom internal tools, dashboards, and admin panels with a drag-and-drop interface
Open Source Alternative to:
Open source LLM engineering platform for AI-powered applications
Stars
Stars growing over the last 30 days37,037Last commit
5 hours agoLicense
MIT
Langfuse provides tracing, evaluations, prompt management, and analytics to debug and improve LLM applications.
Open Source Alternative to:
Open-source coding agent for your IDE and terminal
Stars
36,408Last commit
8 hours agoLicense
Apache-2.0
Runs source-controlled AI checks on every pull request, enforcing your engineering standards as native GitHub status checks with suggested fixes.
Open Source Alternative to:
Unlock Product Insights with Open-Source Analytics
Stars
40,651Last commit
5 hours agoLicense
MIT
All-in-one product analytics platform. Track user behavior, run experiments, and make data-driven decisions to grow your product.
Open Source Alternative to:
Empower your team to build custom internal tools rapidly
Stars
41,161Last commit
12 hours agoLicense
Apache-2.0
Low-code platform for creating powerful internal tools and dashboards with drag-and-drop ease, robust integrations, and customizable workflows.
Open Source Alternative to:
Visual builder for AI agents and LLM workflows
Stars
55,552Last commit
3 months agoLicense
Apache-2.0
Open source platform for building AI agents, chatbots, and multi-agent systems using a drag-and-drop interface, with support for 100+ LLMs and RAG.
Open Source Alternative to:
Secure collaboration platform for mission-critical work
Stars
39,532Last commit
5 hours agoLicense
Unknown
Mattermost provides a flexible, open-source platform for secure team collaboration, designed for organizations with strict security and privacy requirements.
Open Source Alternative to:
Cut and trim video without re-encoding or quality loss
Stars
Stars growing over the last 30 days45,719Last commit
2 days agoLicense
GPL-2.0
Desktop app for lossless video and audio editing. Cut, trim, merge, and remux files in seconds without re-encoding, using FFmpeg under the hood.
Open Source Alternative to:
Open-source e-commerce for modern developers
Stars
37,092Last commit
5 hours agoLicense
MIT
Flexible, customizable e-commerce platform with headless architecture, built-in features, and extensive plugin ecosystem for scalable online stores.
Open Source Alternative to:
Build powerful AI knowledge bases with ease
Stars
29,997Last commit
7 hours agoLicense
Unknown
FastGPT is a free, open-source platform for creating AI-powered knowledge bases with data processing, model invocation, and visual workflows.
Open Source Alternative to:
Open source AI coding agent for the terminal and IDE
Stars
29,016Last commit
5 hours agoLicense
Apache-2.0
Terminal-based AI coding agent that reads your codebase, edits files and runs commands, with support for Qwen, OpenAI, Anthropic, Gemini and local models.
Open Source Alternative to:
Sent – Messaging Infrastructure for Developers. One API for SMS, WhatsApp, and RCS across 190+ countries.
Openlane
Postiz
Bright Data