Open Source Projects using React
A curated collection of the 423 best open source software using React. Find the most popular and trending open source projects to learn from, contribute to, or use in your own projects.
Open-source A/B testing and feature flagging platform
Stars
8,508Last commit
3 days agoLicense
MIT
Powerful, developer-friendly experimentation tool for data-driven product decisions. Seamless integration, real-time insights, and flexible deployment.
Open Source Alternative to:
Fast, flexible VPN replacement with zero-trust security
Stars
9,121Last commit
6 hours agoLicense
Apache-2.0
Replace your VPN with zero-trust access built on WireGuard. Fast, scalable network security with simple policies and identity provider integration.
Open Source Alternative to:
Self-hostable voice agent platform with full model control
Stars
5,904Last commit
8 hours agoLicense
BSD-2-Clause
Open-source voice agent platform that lets you plug in your own STT, LLM, and TTS models, deploy on-prem or in your VPC, and build agents via MCP or a visual workflow builder.
Open Source Alternative to:
Simple yet powerful CI/CD engine with great extensibility
Stars
8,018Last commit
8 hours agoLicense
Apache-2.0
Open-source CI/CD platform using Docker containers for pipeline execution. Create multiple workflows, extend with plugins, and enjoy free lifetime access.
Open Source Alternative to:
Full-stack observability without code changes
Stars
7,976Last commit
4 days agoLicense
Apache-2.0
Coroot simplifies system monitoring by providing metrics, logs, traces, and profiling with zero instrumentation, leveraging eBPF technology.
Open Source Alternative to:
Comprehensive monitoring and incident management platform
Stars
7,743Last commit
6 hours agoLicense
Apache-2.0
All-in-one solution for uptime monitoring, incident management, and status pages to keep your services running smoothly
Open Source Alternative to:
Secure, customizable e-signatures for modern businesses
Stars
7,115Last commit
3 days agoLicense
AGPL-3.0
A powerful, open-source e-signature solution offering customization, integration, and enhanced security for businesses of all sizes.
Open Source Alternative to:
Simplify expense management for businesses of all sizes
Stars
5,066Last commit
6 hours agoLicense
MIT
Automate expense reporting, reimbursements, and corporate card management with real-time data sync and powerful integrations.
Modular auth, payments, emails, and analytics for your product
Stars
6,872Last commit
2 days agoLicense
Unknown
Self-hostable platform combining user auth, payments, email, and analytics into modular building blocks that fit around your existing product.
Open Source Alternative to:
A team of AI agents in a chat app, on your own machine
Stars
5,149Last commit
7 hours agoLicense
Apache-2.0
Run a team of AI agents locally on your own API keys and subscriptions, with scheduled tasks, computer use, and Gmail, GitHub and Slack integrations.
Open Source Alternative to:
Visual app builder that integrates with your existing codebase
Stars
7,117Last commit
20 hours agoLicense
MIT
Open-source visual editor for building websites and web apps. Connect to any data source, design custom UIs, and ship production React code without leaving your stack.
Open Source Alternative to:
Open-source serverless CMS for modern web projects
Stars
8,047Last commit
7 hours agoLicense
MIT
A powerful, scalable platform for building custom websites and apps with serverless architecture, offering flexibility and cost-efficiency.
Open Source Alternative to:
Dashboard for running multiple coding agents in parallel
Stars
6,027Last commit
2 days agoLicense
Apache-2.0
Desktop app that runs 25+ coding agents simultaneously, each isolated in its own Git worktree, so you can orchestrate code changes without switching tools.
Open Source Alternative to:
Open-source cloud communications platform for developers
Stars
8,140Last commit
21 hours agoLicense
MIT
Build and deploy powerful voice and messaging applications with ease using Fonoster's flexible, scalable, and developer-friendly platform.
Open Source Alternative to:
Self-hosted file sharing built for digital sovereignty
Stars
6,188Last commit
7 hours agoLicense
Apache-2.0
Self-hostable cloud file management and collaboration platform with an integrated office suite, zero-trust security, and GDPR compliance for teams and organizations.
Open Source Alternative to:
Desktop SQL client with built-in MCP for AI agent access
Stars
5,236Last commit
23 hours agoLicense
Apache-2.0
Desktop database client for PostgreSQL, MySQL/MariaDB, SQLite, and 14+ more databases, with a built-in MCP server, SQL notebooks, visual query builder, and a plugin system.
Open Source Alternative to:
Self-hosted AI agents that do real work on your machine
Stars
4,640Last commit
7 hours agoLicense
Apache-2.0
Run persistent AI bots that sign into your tools, complete tasks autonomously, and ask for approval when needed. Your keys, your model, your infrastructure.
Open Source Alternative to:
Open-source legal AI that law firms control and extend
Stars
4,356Last commit
13 hours agoLicense
AGPL-3.0
Self-hostable alternative to Harvey and Legora with document analysis, contract drafting, tabular review, and reusable workflows. Zero licensing costs, full data control.
Open Source Alternative to:
Build reliable AI apps with comprehensive observability
Stars
6,228Last commit
8 hours agoLicense
Apache-2.0
Open-source platform for logging, monitoring, and debugging LLM applications. Route, debug, and analyze AI apps with comprehensive observability tools.
Open Source Alternative to:
Build stateful backends with in-memory actors
Stars
6,313Last commit
8 hours agoLicense
Apache-2.0
Open-source infrastructure for long-lived, in-memory processes called Actors. Combines state and compute with sub-millisecond latency, realtime capabilities, and horizontal scaling.
Open Source Alternative to:
Launch Your Store in Minutes, No Code Needed
Stars
5,524Last commit
17 hours agoLicense
MIT
Fast, modern e-commerce with instant setup and full customization. Powered by Stripe for seamless transactions.
Open Source Alternative to:
Transform SQL into beautiful data stories
Stars
7,033Last commit
3 days agoLicense
MIT
Create data-driven websites and reports using SQL and Markdown, with automatic visualizations and interactive elements.
Open Source Alternative to:
Automated translations that scale with your code and commits
Stars
5,396Last commit
3 days agoLicense
Apache-2.0
Transform your app into a global product with AI-powered localization that integrates directly into your development workflow. Supports 83+ languages with Git-native automation.
Open Source Alternative to:
Open source kanban boards with unlimited everything
Stars
5,779Last commit
17 days agoLicense
AGPL-3.0
Free kanban project management with unlimited boards, lists, and cards. Import Trello boards, collaborate with teams, and self-host for complete control.
Open Source Alternative to:
Open-source BI for modern data teams
Stars
6,193Last commit
6 hours agoLicense
MIT
Self-serve analytics platform that transforms dbt models into interactive dashboards, enabling data-driven decisions across organizations.
Open Source Alternative to:
Self-hosted cloud platform with automated security
Stars
6,187Last commit
10 days agoLicense
Unknown
Complete self-hosting solution with automated maintenance, Smart-Shield protection, anti-DDoS, SSO authentication, and VPN access for secure private cloud management.
Open Source Alternative to:
The open-source, affordable email platform
Stars
5,524Last commit
1 day agoLicense
AGPL-3.0
Plunk unifies marketing, transactional, and broadcast emails into a single, complete solution for businesses of all sizes.
Open Source Alternative to:
Intercept, modify, and debug HTTP(S) requests effortlessly
Stars
6,753Last commit
9 hours 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:
Smart desktop AI assistant with powerful local knowledge features
Stars
5,373Last commit
1 month agoLicense
Unknown
Cross-platform desktop AI assistant supporting multiple providers, local knowledge base, and custom prompts. Integrates MCP protocol for enhanced AI tool capabilities.
Open Source Alternative to:
Feature flags and remote config for rapid deployment
Stars
6,600Last commit
2 days agoLicense
BSD-3-Clause
Powerful feature management platform for seamless software releases, A/B testing, and personalized user experiences.
Open Source Alternative to:
Secure, scalable API key management for developers
Stars
5,468Last commit
7 hours 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:
Distributed OLAP database for real-time analytics at scale
Stars
6,161Last commit
8 hours agoLicense
Apache-2.0
Sub-second SQL queries on fresh streaming data at petabyte scale, built for high-concurrency user-facing apps and AI agent backends.
Open Source Alternative to:
Secure, encrypted notes for your digital life
Stars
6,669Last commit
2 days agoLicense
AGPL-3.0
Cross-platform note-taking app with end-to-end encryption, offline access, and powerful organization features for privacy-conscious users.
Open Source Alternative to:
Build scalable authorization in minutes, not months
Stars
5,963Last commit
4 days agoLicense
AGPL-3.0
Open-source authorization service for implementing fine-grained access controls. Centralized, scalable solution supporting RBAC, ABAC and ReBAC with Google Zanzibar-inspired architecture.
Open Source Alternative to:
Effortless event-driven workflows for modern applications
Stars
5,959Last commit
7 hours agoLicense
SSPL-1.0
Simplify backend processes with event-driven functions, seamless integrations, and powerful debugging tools for developers.
Open Source Alternative to:
Build, automate, and improve AI agents with your team
Stars
4,843Last commit
20 hours agoLicense
MIT
Open-source workspace for building and running AI agents: chat-driven development, scheduling, human-in-the-loop approvals, versioning, and tracing. Self-host or use the cloud.
Open Source Alternative to:
Pay per email sent, not for contact storage
Stars
4,738Last commit
17 hours agoLicense
AGPL-3.0
Open source email platform for transactional and marketing emails. Self-host or use cloud service with transparent pricing - pay only for emails sent.
Open Source Alternative to:
Full observability for AI agents in production
Stars
4,723Last commit
8 hours agoLicense
MIT
Open-source platform for monitoring AI agents: captures traces, surfaces failure patterns, alerts on issues, and helps you verify fixes with automated evals.
Open Source Alternative to:
Simulation-based testing and evaluation for AI agents
Stars
4,977Last commit
7 hours agoLicense
Apache-2.0
Tests AI agents through multi-turn simulations, LLM-based scoring, and production tracing so teams can ship reliable agents with confidence.
Open Source Alternative to:
Enterprise workplace AI with data you own and control
Stars
3,839Last commit
7 hours agoLicense
Apache-2.0
Self-hostable enterprise AI platform that unifies business data across apps, powers a knowledge graph for cited answers, and lets teams build AI agents across their stack.
Open Source Alternative to:
Effortlessly manage events and sell tickets online
Stars
4,071Last commit
22 hours agoLicense
Unknown
Hi.Events is a comprehensive platform for event management and online ticket sales, offering features like QR code check-in, custom ticket types, and embeddable widgets.
Open Source Alternative to:
Effortless group scheduling for seamless collaboration
Stars
5,310Last commit
7 hours agoLicense
AGPL-3.0
A user-friendly, open-source tool for coordinating events and meetings without the hassle of back-and-forth emails or messages.
Open Source Alternative to:
Sent – Messaging Infrastructure for Developers. One API for SMS, WhatsApp, and RCS across 190+ countries.
Sent
Bright Data
Stellar Hosted