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Open Source Projects using React

A curated collection of the 394 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.

Favicon of Your Next Store (YNS)

Your Next Store (YNS)

Launch Your Store in Minutes, No Code Needed

  • Stars

    5,478

  • Last commit

    6 days ago

  • License

    MIT
Fast, modern e-commerce with instant setup and full customization. Powered by Stripe for seamless transactions.

Open Source Alternative to:

Favicon of Shopify
Shopify
Favicon of Helicone

Helicone

AI
Build reliable AI apps with comprehensive observability

  • Stars

    6,084

  • Last commit

    3 days ago

  • License

    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:

Favicon of DataDog
DataDog
Favicon of Evidence

Evidence

Transform SQL into beautiful data stories

  • Stars

    6,862

  • Last commit

    9 hours ago

  • License

    MIT
Create data-driven websites and reports using SQL and Markdown, with automatic visualizations and interactive elements.

Open Source Alternative to:

Favicon of Power BI
Power BI
Favicon of Mike

Mike

AI
Open-source legal AI that law firms control and extend

  • Stars

    4,135

  • Last commit

    14 hours ago

  • License

    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:

Favicon of Harvey
Harvey
Favicon of Rivet

Rivet

Build stateful backends with in-memory actors

  • Stars

    6,069

  • Last commit

    6 hours ago

  • License

    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:

Favicon of Cloudflare Workers
Cloudflare Workers
Favicon of Lingo.dev

Lingo.dev

AI
Automated translations that scale with your code and commits

  • Stars

    5,405

  • Last commit

    10 hours ago

  • License

    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:

Favicon of Crowdin
Crowdin
Favicon of Cosmos Server

Cosmos Server

Self-hosted cloud platform with automated security

  • Stars

    6,121

  • Last commit

    1 day ago

  • License

    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:

Favicon of Umbrel
Umbrel
Favicon of Requestly

Requestly

Intercept, modify, and debug HTTP(S) requests effortlessly

  • Stars

    6,750

  • Last commit

    14 hours ago

  • License

    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:

Favicon of Postman
Postman
Favicon of Lightdash

Lightdash

Open-source BI for modern data teams

  • Stars

    6,056

  • Last commit

    6 hours ago

  • License

    MIT
Self-serve analytics platform that transforms dbt models into interactive dashboards, enabling data-driven decisions across organizations.

Open Source Alternative to:

Favicon of Power BI
Power BI
Favicon of 5ire

5ire

AI
Smart desktop AI assistant with powerful local knowledge features

  • Stars

    5,338

  • Last commit

    1 month ago

  • License

    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:

Favicon of Claude
Claude
Favicon of Kan

Kan

Open source kanban boards with unlimited everything

  • Stars

    5,359

  • Last commit

    7 days ago

  • License

    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:

Favicon of Jira
Jira
Favicon of Flagsmith

Flagsmith

Feature flags and remote config for rapid deployment

  • Stars

    6,519

  • Last commit

    11 hours ago

  • License

    BSD-3-Clause
Powerful feature management platform for seamless software releases, A/B testing, and personalized user experiences.

Open Source Alternative to:

Favicon of LaunchDarkly
LaunchDarkly
Favicon of UnKey

UnKey

Secure, scalable API key management for developers

  • Stars

    5,420

  • Last commit

    7 hours ago

  • License

    AGPL-3.0
Streamline API authentication with UnKey's powerful, developer-friendly platform for creating, revoking, and monitoring API keys.

Open Source Alternative to:

Favicon of Kong
Kong
Favicon of Plunk

Plunk

The open-source, affordable email platform

  • Stars

    5,376

  • Last commit

    2 days ago

  • License

    AGPL-3.0
Plunk unifies marketing, transactional, and broadcast emails into a single, complete solution for businesses of all sizes.

Open Source Alternative to:

Favicon of Resend
Resend
Favicon of Apache Pinot

Apache Pinot

Distributed OLAP database for real-time analytics at scale

  • Stars

    6,122

  • Last commit

    6 hours ago

  • License

    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:

Favicon of Splunk
Splunk
Favicon of Permify

Permify

Build scalable authorization in minutes, not months

  • Stars

    5,936

  • Last commit

    18 hours ago

  • License

    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:

Favicon of Auth0
Auth0
Favicon of Standard Notes

Standard Notes

Secure, encrypted notes for your digital life

  • Stars

    6,591

  • Last commit

    1 day ago

  • License

    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:

Favicon of Obsidian
Obsidian
Favicon of Tabularis

Tabularis

Desktop SQL client with built-in MCP for AI agent access

  • Stars

    4,125

  • Last commit

    10 hours ago

  • License

    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:

Favicon of TablePlus
TablePlus
Favicon of Inngest

Inngest

Effortless event-driven workflows for modern applications

  • Stars

    5,742

  • Last commit

    6 hours ago

  • License

    SSPL-1.0
Simplify backend processes with event-driven functions, seamless integrations, and powerful debugging tools for developers.

Open Source Alternative to:

Favicon of Kafka
Kafka
Favicon of ACI.dev

ACI.dev

AI
Build reliable AI agents with unified tool integration

  • Stars

    4,880

  • Last commit

    3 months ago

  • License

    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:

Favicon of Pipedream
Pipedream
Favicon of Latitude

Latitude

AI
Full observability for AI agents in production

  • Stars

    4,595

  • Last commit

    8 hours ago

  • License

    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:

Favicon of LangSmith
LangSmith
Favicon of useSend

useSend

Pay per email sent, not for contact storage

  • Stars

    4,614

  • Last commit

    26 days ago

  • License

    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:

Favicon of Resend
Resend
Favicon of Agenta

Agenta

AI
Build reliable LLM apps with integrated workflows

  • Stars

    4,495

  • Last commit

    7 hours ago

  • License

    MIT
Open-source LLMOps platform providing prompt management, evaluation, and observability tools for building robust AI applications with team collaboration.

Open Source Alternative to:

Favicon of LangSmith
LangSmith
Favicon of Hi.Events

Hi.Events

Effortlessly manage events and sell tickets online

  • Stars

    3,986

  • Last commit

    7 days ago

  • License

    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:

Favicon of Eventbrite
Eventbrite
Favicon of Rallly

Rallly

Effortless group scheduling for seamless collaboration

  • Stars

    5,217

  • Last commit

    7 hours ago

  • License

    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:

Favicon of Calendly
Calendly
Favicon of Colanode

Colanode

Self-hosted team workspace with chat, docs, and databases

  • Stars

    5,019

  • Last commit

    5 months ago

  • License

    Apache-2.0
Local-first collaboration platform combining real-time chat, rich text pages, databases, and file management in a single self-hostable workspace.

Open Source Alternative to:

Favicon of Notion
Notion
Favicon of Jitsu

Jitsu

Open-source data integration for modern stacks

  • Stars

    5,038

  • Last commit

    17 hours ago

  • License

    MIT
Collect, transform, and sync data across your entire infrastructure with a flexible, code-based approach to data integration.

Open Source Alternative to:

Favicon of Segment
Segment
Favicon of Pipeshub

Pipeshub

AI
Enterprise workplace AI with data you own and control

  • Stars

    3,568

  • Last commit

    12 hours ago

  • License

    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:

Favicon of Glean
Glean
Favicon of Rowy

Rowy

Build powerful backends without leaving your browser

  • Stars

    6,833

  • Last commit

    2 years ago

  • License

    Apache-2.0
A low-code platform for creating robust backends, complete with a spreadsheet UI for easy data management and custom functions.

Open Source Alternative to:

Favicon of Airtable
Airtable
Favicon of Erxes

Erxes

Open-source growth platform for customer-centric teams

  • Stars

    4,068

  • Last commit

    7 hours ago

  • License

    AGPL-3.0
All-in-one solution for marketing, sales, and customer service. Boost engagement, streamline workflows, and drive growth.

Open Source Alternative to:

Favicon of Attio
Attio
Favicon of IronCalc

IronCalc

A spreadsheet engine you can embed, self-host, or run in the browser

  • Stars

    4,109

  • Last commit

    9 hours ago

  • License

    Apache-2.0
IronCalc is an open-source, Rust-powered spreadsheet engine with .xlsx support, 300+ functions, and bindings for JavaScript and Python.

Open Source Alternative to:

Favicon of Microsoft Excel
Microsoft Excel
Favicon of Zen

Zen

System-wide ad-blocking and privacy protection, no extensions needed

  • Stars

    4,134

  • Last commit

    6 days ago

  • License

    MIT
Free, open-source desktop app that blocks ads, trackers, and surveillance scripts across all browsers and apps on Windows, macOS, and Linux.

Open Source Alternative to:

Favicon of AdGuard
AdGuard
Favicon of Tracecat

Tracecat

AI
Open source security automation platform for builders

  • Stars

    3,770

  • Last commit

    7 hours ago

  • License

    AGPL-3.0
Tracecat is a scalable, self-hostable platform for automating security workflows and playbooks without limits.

Open Source Alternative to:

Favicon of Jira
Jira
Favicon of Flipt

Flipt

Git-native feature management for developers

  • Stars

    4,873

  • Last commit

    11 hours ago

  • License

    GPL-3.0
A feature flag platform that integrates with Git workflows, enabling developers to manage features directly in their codebase.

Open Source Alternative to:

Favicon of LaunchDarkly
LaunchDarkly
Favicon of Bigcapital

Bigcapital

Automate financial processes for smarter business decisions

  • Stars

    3,846

  • Last commit

    10 hours ago

  • License

    AGPL-3.0
Cloud-based accounting software that streamlines bookkeeping, generates intelligent reports, and offers multi-currency support for efficient financial management.

Open Source Alternative to:

Favicon of Quickbooks
Quickbooks
Favicon of Cinny

Cinny

Secure and elegant Matrix client for seamless conversations

  • Stars

    3,848

  • Last commit

    5 days ago

  • License

    AGPL-3.0
Cinny offers a simple, elegant, and secure interface for Matrix-based conversations, protected by end-to-end encryption.

Open Source Alternative to:

Favicon of Discord
Discord
Favicon of Chartbrew

Chartbrew

Create stunning data visualizations with ease

  • Stars

    4,041

  • Last commit

    9 hours ago

  • License

    MIT
A powerful, open-source platform for building interactive dashboards and charts from multiple data sources without coding.

Open Source Alternative to:

Favicon of Power BI
Power BI
Favicon of Ueli

Ueli

Quick access to apps and files with keyboard shortcuts

  • Stars

    4,583

  • Last commit

    8 days ago

  • License

    MIT
A keyboard-driven launcher that helps you quickly find and open applications, files, and bookmarks across Windows, macOS, and Linux

Open Source Alternative to:

Favicon of Raycast
Raycast
Favicon of Laminar

Laminar

AI
AI-powered platform for engineering LLM products

  • Stars

    3,182

  • Last commit

    1 day ago

  • License

    Apache-2.0
Laminar is an open-source platform that helps collect, understand, and utilize data for building high-quality LLM applications.

Open Source Alternative to:

Favicon of LangChain
LangChain
Favicon of Bknd

Bknd

Feature-rich backend that runs anywhere you need it

  • Stars

    3,749

  • Last commit

    5 months ago

  • License

    Apache-2.0
Lightweight Firebase alternative with database, auth, storage, and workflows. Framework-agnostic backend that integrates with NextJS, Remix, Hono and more.

Open Source Alternative to:

Favicon of Supabase
Supabase
Favicon of Spliit

Spliit

Effortlessly split expenses with friends and roommates

  • Stars

    2,865

  • Last commit

    12 hours ago

  • License

    MIT
A user-friendly app for tracking shared expenses, settling debts, and managing group finances with ease and transparency.

Open Source Alternative to:

Favicon of Splitwise
Splitwise
Favicon of Worklenz

Worklenz

Open source agency management tool for streamlined success

  • Stars

    3,148

  • Last commit

    9 days ago

  • License

    AGPL-3.0
Worklenz is a comprehensive project management platform that helps agencies organize tasks, track resources, and boost productivity.

Open Source Alternative to:

Favicon of Linear
Linear
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