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.
Privacy-first CAPTCHA alternative with proof-of-work
Stars
Stars growing over the last 30 days8,151Last commit
2 days agoLicense
Apache-2.0
Lightweight open-source CAPTCHA solution using SHA-256 proof-of-work. 250x smaller than hCaptcha, fully customizable, and privacy-focused with zero telemetry.
Open Source Alternative to:
Self-hosted enterprise agent platform with real permissions
Stars
Stars growing quickly over the last 30 days7,018Last commit
18 hours agoLicense
MIT
Deploy AI agents inside your own infrastructure with document-grounded answers, computer use, and support for any AG-UI-compatible agent framework.
Open Source Alternative to:
Flexible, scalable Node.js CMS and app framework
Stars
9,980Last commit
1 day agoLicense
MIT
A powerful, customizable content management system and application framework built on Node.js, GraphQL, and React
Open Source Alternative to:
Distributed task queue for background jobs and workflows
Stars
8,175Last commit
20 hours agoLicense
MIT
Durable orchestration platform for managing AI agents, scheduling background tasks, and running mission-critical workflows.
Open Source Alternative to:
Private workspace for notes, tasks, and databases
Stars
8,981Last commit
1 day agoLicense
Unknown
A local-first, encrypted workspace for notes, tasks, databases, and chats. Your data stays on your device, syncs peer-to-peer, and never passes through a central server.
Open Source Alternative to:
Build and deploy scalable storefronts with ease
Stars
10,959Last commit
5 months agoLicense
MIT
A comprehensive Frontend as a Service solution that helps developers create, deploy and manage enterprise ecommerce storefronts with ready integrations and cloud infrastructure.
Open Source Alternative to:
Magical data pipeline tool for seamless transformations
Stars
8,837Last commit
22 hours agoLicense
Apache-2.0
Open-source data pipeline platform for effortless data integration, transformation, and orchestration using Python, SQL, and R.
Open Source Alternative to:
Professional digital painting made accessible to everyone
Stars
10,617Last commit
16 hours agoLicense
GPL-3.0
Free and open source painting program built by artists for artists. Features professional brushes, layers, animation tools, and drawing assistants for all skill levels.
Open Source Alternative to:
Cloud-native data warehouse for lightning-fast analytics
Stars
9,477Last commit
11 hours agoLicense
Apache-2.0
Databend is an open-source, elastic cloud data warehouse built for high-performance analytics and seamless integration with popular data tools.
Open Source Alternative to:
Open source metering and billing infrastructure for any pricing model
Stars
6,880Last commit
12 hours agoLicense
AGPL-3.0
A flexible billing platform that handles usage-based metering, credit management, and subscription billing, giving developers full control over pricing models.
Open Source Alternative to:
Serverless backend platform for modern app development
Stars
9,366Last commit
14 hours agoLicense
MIT
Fully managed backend infrastructure with built-in authentication, database, storage, and serverless functions for rapid application development.
Open Source Alternative to:
Flexible e-commerce for modern businesses
Stars
8,537Last commit
1 day 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:
Real-time observability for modern web applications
Stars
9,384Last commit
19 hours agoLicense
Apache-2.0
Comprehensive monitoring solution offering error tracking, session replay, and performance insights for seamless debugging and optimization.
Open Source Alternative to:
Visual development platform for modern web experiences
Stars
8,872Last commit
3 days agoLicense
MIT
Drag-and-drop interface for creating and optimizing digital experiences, with headless CMS and powerful integrations.
Open Source Alternative to:
Open-source A/B testing and feature flagging platform
Stars
8,527Last commit
11 hours agoLicense
MIT
Powerful, developer-friendly experimentation tool for data-driven product decisions. Seamless integration, real-time insights, and flexible deployment.
Open Source Alternative to:
Comprehensive open-source business management platform
Stars
Stars growing over the last 30 days8,551Last commit
10 hours agoLicense
AGPL-3.0
All-in-one solution for ERP, CRM, HRM, ATS, and project management to streamline your business operations
Open Source Alternative to:
Fast, flexible VPN replacement with zero-trust security
Stars
9,123Last commit
12 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:
Security-first diagramming with no login required
Stars
Stars growing over the last 30 days8,956Last commit
1 day agoLicense
Apache-2.0
Create professional diagrams online or offline with security-first approach. No registration needed. Works with Google Drive, SharePoint, Atlassian, and more.
Open Source Alternative to:
Self-hostable voice agent platform with full model control
Stars
Stars growing over the last 30 days5,943Last commit
17 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:
Self-hosted AI agents that do real work on your machine
Stars
Stars growing quickly over the last 30 days5,507Last commit
10 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:
A team of AI agents in a chat app, on your own machine
Stars
Stars growing quickly over the last 30 days5,518Last commit
11 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:
Simple yet powerful CI/CD engine with great extensibility
Stars
8,043Last commit
12 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:
Secure, customizable e-signatures for modern businesses
Stars
7,163Last commit
1 day 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:
Full-stack observability without code changes
Stars
7,982Last commit
3 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
7,751Last commit
10 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:
Modular auth, payments, emails, and analytics for your product
Stars
6,878Last commit
18 hours 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:
Simplify expense management for businesses of all sizes
Stars
5,071Last commit
10 hours agoLicense
MIT
Automate expense reporting, reimbursements, and corporate card management with real-time data sync and powerful integrations.
Visual app builder that integrates with your existing codebase
Stars
7,125Last commit
11 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:
Dashboard for running multiple coding agents in parallel
Stars
Stars growing over the last 30 days6,068Last commit
1 day 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:
The tensor database for AI data
Stars
9,258Last commit
5 months agoLicense
Apache-2.0
Deep Lake is an open-source database for storing, querying and managing complex AI data like images, audio, and embeddings.
Open Source Alternative to:
Open-source serverless CMS for modern web projects
Stars
8,047Last commit
1 day agoLicense
MIT
A powerful, scalable platform for building custom websites and apps with serverless architecture, offering flexibility and cost-efficiency.
Open Source Alternative to:
Effortless API mocking for seamless development
Stars
8,453Last commit
18 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:
Open-source cloud communications platform for developers
Stars
8,146Last commit
2 days 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:
Unified observability database for metrics, logs, and traces
Stars
6,760Last commit
1 day agoLicense
Apache-2.0
Cloud-native observability database unifying metrics, logs, and traces with sub-second queries, 50x cost reduction, and seamless OpenTelemetry integration.
Open Source Alternative to:
Auto-generated network diagrams that stay current
Stars
5,896Last commit
2 days agoLicense
AGPL-3.0
Discovers your network via SNMP, LLDP, and ARP, then builds and maintains L2/L3 topology diagrams, host inventories, and service dependency maps automatically.
Open Source Alternative to:
Desktop SQL client with built-in MCP for AI agent access
Stars
Stars growing over the last 30 days5,270Last commit
13 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:
Secure email, calendar and contacts with end-to-end encryption
Stars
8,040Last commit
1 day agoLicense
GPL-3.0
Tuta offers encrypted email, calendar and contacts with quantum-resistant security, protecting your privacy without ads or tracking.
Open Source Alternative to:
Self-hosted file sharing built for digital sovereignty
Stars
6,218Last commit
22 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:
Secure collaboration with end-to-end encryption
Stars
8,027Last commit
1 day agoLicense
AGPL-3.0
Open-source collaboration suite offering encrypted document editing, file sharing, and team workspaces with complete privacy protection.
Open Source Alternative to:
Open-source legal AI that law firms control and extend
Stars
4,370Last commit
21 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
6,235Last commit
17 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:
Transform SQL into beautiful data stories
Stars
7,052Last commit
1 day agoLicense
MIT
Create data-driven websites and reports using SQL and Markdown, with automatic visualizations and interactive elements.
Open Source Alternative to:
Docmost – Open-source wiki software with real-time collaboration, diagrams, AI, SSO, RBAC permissions and more.
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