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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2FA token manager for Android with encrypted vault
Stars
13,482Last commit
2 months agoLicense
GPL-3.0
Android app for managing two-factor authentication tokens with encrypted storage, biometric unlock, flexible backups, and import/export from major 2FA apps.
Open Source Alternative to:
Send invoices, accept payments, manage your business—all free
Stars
10,509Last commit
7 hours agoLicense
Elastic-2.0
Free invoicing software for freelancers and small businesses. Create professional invoices, track expenses, accept online payments, and manage projects without hidden fees.
Open Source Alternative to:
Secure desktop investment tracker for private wealth management
Stars
9,336Last commit
4 hours agoLicense
AGPL-3.0
Wealthfolio is a simple, secure desktop app for tracking investments and managing your wealth without compromising data privacy.
Open Source Alternative to:
Lightning-fast open source search engine for big data
Stars
12,076Last commit
9 hours agoLicense
GPL-3.0
Open source search database delivering 2.83x faster performance than Elasticsearch. Features vector search, SQL interface, and full-text capabilities.
Open Source Alternative to:
Effortless time tracking for open source projects
Stars
9,110Last commit
18 hours agoLicense
AGPL-3.0
Seamlessly track time across multiple projects, generate insightful reports, and optimize your open source contributions.
Open Source Alternative to:
Simplify your links with this free, modern URL shortener
Stars
11,193Last commit
18 days agoLicense
MIT
Kutt offers a free and open-source solution for shortening URLs, complete with custom domains and detailed analytics.
Open Source Alternative to:
Full-stack observability without the enterprise price tag
Stars
9,992Last commit
8 hours agoLicense
MIT
Open source observability platform unifying session replays, logs, traces, metrics and errors. Fast search, automatic clustering, $0.40/GB pricing.
Open Source Alternative to:
Open-source document sharing with powerful analytics
Stars
9,301Last commit
2 months agoLicense
AGPL-3.0
Secure, customizable platform for sharing documents and tracking engagement. Perfect for sales teams, marketers, and businesses.
Open Source Alternative to:
Instant file sharing across devices without setup
Stars
11,757Last commit
7 months agoLicense
GPL-3.0
Share files instantly between devices using peer-to-peer technology. No registration, installation, or configuration required. Works cross-platform.
Open Source Alternative to:
Self-hosted bookmark manager built for speed and simplicity
Stars
11,387Last commit
11 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:
Visual web development with code-level control
Stars
9,151Last commit
9 hours agoLicense
AGPL-3.0
Powerful no-code platform for building responsive websites. Combines visual editing with full HTML/CSS customization.
Open Source Alternative to:
Create powerful forms with ease and flexibility
Stars
9,066Last commit
1 hour 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:
Full-text & vector search at the edge.
Stars
10,602Last commit
19 days agoLicense
Unknown
Blend full-text and semantic search for unlimited queries across 300 global locations. Get precise answers and matches at a flat rate, no matter your search volume.
Open Source Alternative to:
Track, analyze, and optimize your investments effortlessly
Stars
9,659Last commit
11 hours agoLicense
AGPL-3.0
Open-source wealth management software for tracking stocks, ETFs, and cryptocurrencies across multiple portfolios
Open Source Alternative to:
Terminal-native AI coding agent built on ZSH
Stars
7,630Last commit
12 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:
Status page and uptime monitoring for growing teams
Stars
9,248Last commit
11 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:
On-the-fly image resizing and conversion for your own server
Stars
11,178Last commit
20 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:
Modern kanban that's fast, fun, and refreshingly simple
Stars
8,286Last commit
13 minutes 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:
Privacy-first CAPTCHA alternative with proof-of-work
Stars
Stars growing over the last 30 days8,263Last commit
8 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:
Distributed task queue for background jobs and workflows
Stars
8,231Last commit
4 hours agoLicense
MIT
Durable orchestration platform for managing AI agents, scheduling background tasks, and running mission-critical workflows.
Open Source Alternative to:
Universal API management for REST, GraphQL, gRPC & async
Stars
10,876Last commit
28 minutes 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:
Private workspace for notes, tasks, and databases
Stars
9,053Last commit
3 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
9,987Last commit
2 days agoLicense
MIT
A powerful, customizable content management system and application framework built on Node.js, GraphQL, and React
Open Source Alternative to:
Build and deploy scalable storefronts with ease
Stars
10,964Last 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:
Cloud browser sessions for AI agents and web automation
Stars
7,930Last 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:
Professional digital painting made accessible to everyone
Stars
10,701Last commit
4 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:
Get alerted when cron jobs and scheduled tasks miss their run
Stars
10,502Last commit
1 day 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
9,492Last commit
19 minutes 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:
Magical data pipeline tool for seamless transformations
Stars
8,843Last commit
13 days 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:
Serverless backend platform for modern app development
Stars
9,376Last commit
4 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
8,565Last commit
14 minutes 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
9,386Last 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
8,884Last commit
20 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
8,571Last commit
44 minutes 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 days8,705Last commit
2 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:
Monitor LLM performance with open-source observability
Stars
7,523Last commit
16 hours 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:
Security-first diagramming with no login required
Stars
Stars growing over the last 30 days9,210Last commit
2 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:
Open source metering and billing infrastructure for any pricing model
Stars
6,872Last commit
16 minutes 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:
Fast, flexible VPN replacement with zero-trust security
Stars
9,169Last commit
37 minutes 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
Stars growing over the last 30 days6,032Last commit
10 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:
Build and play games inside a game engine that runs live
Stars
6,524Last commit
11 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:
Simple yet powerful CI/CD engine with great extensibility
Stars
8,119Last commit
7 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:
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