Open Source Alternatives to Popular Software
Over 1 million users replaced their proprietary tools with open source software. Discover the best alternatives and join the movement.
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Terminal-native AI coding agent built on ZSH
Stars
7,638Last commit
17 hours agoLicense
Apache-2.0
AI coding harness that runs inside your terminal, mixes LLMs per task, and uses multi-agent architecture to handle large codebases without bloating context.
Open Source Alternative to:
Self-hosted bookmark manager built for speed and simplicity
Stars
11,303Last commit
13 days agoLicense
MIT
Minimal, fast bookmark manager with automatic metadata fetching, archiving, multi-user support, and browser extensions. Easy Docker setup with SQLite.
Open Source Alternative to:
Create powerful forms with ease and flexibility
Stars
9,022Last commit
5 days agoLicense
AGPL-3.0
A versatile form builder for crafting custom surveys, quizzes, and data collection tools with advanced features and integrations.
Open Source Alternative to:
Track, analyze, and optimize your investments effortlessly
Stars
9,448Last commit
10 hours agoLicense
AGPL-3.0
Open-source wealth management software for tracking stocks, ETFs, and cryptocurrencies across multiple portfolios
Open Source Alternative to:
On-the-fly image resizing and conversion for your own server
Stars
11,122Last commit
18 hours agoLicense
Apache-2.0
Self-hosted image processing server that resizes, converts, and optimizes images on demand via URL parameters, with built-in security against common attack vectors.
Open Source Alternative to:
Status page and uptime monitoring for growing teams
Stars
9,184Last commit
9 hours agoLicense
AGPL-3.0
Open-source status page and uptime monitor that tracks endpoints from 28 global regions, communicates incidents, and helps satisfy SOC 2 audit requirements.
Open Source Alternative to:
Modern kanban that's fast, fun, and refreshingly simple
Stars
8,248Last commit
1 day agoLicense
Unknown
Track issues, ideas, and projects with a modern kanban board that's fast and straightforward. Free for 1000 cards, then $20/month for unlimited use.
Open Source Alternative to:
Cloud browser sessions for AI agents and web automation
Stars
7,804Last commit
2 days agoLicense
Apache-2.0
Open-source browser infrastructure that lets AI agents and automation scripts control cloud browser fleets via a simple API, with built-in CAPTCHA solving and proxy management.
Open Source Alternative to:
Privacy-first CAPTCHA alternative with proof-of-work
Stars
8,011Last 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:
Universal API management for REST, GraphQL, gRPC & async
Stars
10,861Last commit
9 hours agoLicense
Unknown
Fast, scalable API management platform with open source gateway, analytics, dev portal and dashboard. Deploy anywhere with AI-ready governance and security.
Open Source Alternative to:
Build and deploy scalable storefronts with ease
Stars
10,957Last commit
4 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:
Distributed task queue for background jobs and workflows
Stars
8,116Last commit
8 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
8,918Last commit
2 days 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:
Flexible, scalable Node.js CMS and app framework
Stars
9,973Last commit
17 days agoLicense
MIT
A powerful, customizable content management system and application framework built on Node.js, GraphQL, and React
Open Source Alternative to:
Magical data pipeline tool for seamless transformations
Stars
8,828Last commit
13 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:
Get alerted when cron jobs and scheduled tasks miss their run
Stars
10,417Last commit
22 hours agoLicense
BSD-3-Clause
Monitors cron jobs, background workers, and scheduled tasks by expecting periodic HTTP pings and alerting you when they stop arriving on time.
Open Source Alternative to:
Cloud-native data warehouse for lightning-fast analytics
Stars
9,466Last commit
8 hours agoLicense
Unknown
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:
Professional digital painting made accessible to everyone
Stars
10,548Last commit
1 day 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:
Open source metering and billing infrastructure for any pricing model
Stars
6,892Last commit
9 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
9,357Last commit
10 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
8,517Last commit
12 hours 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:
Self-hosted enterprise agent platform with real permissions
Stars
6,477Last commit
10 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:
Real-time observability for modern web applications
Stars
9,380Last commit
13 days 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
8,866Last commit
18 hours 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
8,499Last commit
8 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:
Monitor LLM performance with open-source observability
Stars
7,494Last commit
2 days agoLicense
Apache-2.0
Open-source observability platform for LLMs using OpenTelemetry. Monitor performance, track costs, and debug AI applications with just 2 lines of code.
Open Source Alternative to:
Fast, flexible VPN replacement with zero-trust security
Stars
9,113Last commit
8 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:
Comprehensive open-source business management platform
Stars
8,367Last 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:
Self-hostable voice agent platform with full model control
Stars
5,871Last commit
11 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:
Security-first diagramming with no login required
Stars
8,763Last commit
6 days 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:
Build and play games inside a game engine that runs live
Stars
6,487Last commit
9 hours agoLicense
MIT
A game creation platform built on Valve's Source 2 engine, letting you build, share, and play games without leaving the environment.
Open Source Alternative to:
Full-stack observability without code changes
Stars
7,972Last commit
2 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:
Simple yet powerful CI/CD engine with great extensibility
Stars
8,001Last commit
9 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:
Comprehensive monitoring and incident management platform
Stars
7,733Last commit
8 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
7,096Last commit
16 hours 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:
Modular auth, payments, emails, and analytics for your product
Stars
6,867Last commit
9 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
5,060Last commit
8 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
7,099Last commit
2 days 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:
The tensor database for AI data
Stars
9,251Last 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
8,046Last commit
8 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
5,983Last commit
13 hours 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:
Effortless API mocking for seamless development
Stars
8,443Last commit
15 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:
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