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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Build powerful web apps without complex coding
Stars
28,353Last commit
11 hours agoLicense
Unknown
Low-code platform for creating custom business applications quickly. Design, automate, and deploy with ease.
Open Source Alternative to:
Local-first, Git-native personal knowledge base with AI
Stars
20,331Last commit
15 hours agoLicense
AGPL-3.0
A free, open source note-taking app built on plain Markdown files, Git version control, and direct AI model integration. No account required.
Open Source Alternative to:
GPU-accelerated terminal emulator with multiplexing across all platforms
Stars
29,352Last commit
12 hours agoLicense
MIT
Cross-platform terminal emulator and multiplexer with GPU acceleration, true color support, and Lua configuration. Runs on Linux, macOS, Windows, FreeBSD, and NetBSD.
Open Source Alternative to:
Chromium browser built for sharing with AI agents
Stars
Stars growing quickly over the last 30 days19,606Last commit
13 hours agoLicense
MIT
A Chromium-based browser that lets AI agents like Claude Code and Codex run web automation using your real logged-in sessions, without interrupting your browsing.
Open Source Alternative to:
Time-series database and historian for industrial data
Stars
25,172Last commit
6 days agoLicense
AGPL-3.0
High-performance time-series database with industrial data management, built-in stream analytics, and AI-driven anomaly detection for operational environments.
Open Source Alternative to:
Distributed tracing, metrics, logs, and GenAI monitoring in one
Stars
24,975Last commit
12 hours agoLicense
Apache-2.0
Open source observability platform covering distributed tracing, metrics, logs, profiling, and LLM cost tracking across 10+ languages with eBPF support on Kubernetes.
Open Source Alternative to:
Procedural vector editor that runs in your browser, no signup needed
Stars
27,730Last commit
11 hours agoLicense
Apache-2.0
A free, open source vector graphics editor built around nondestructive, node-based design. Runs locally in the browser, exports SVG, PNG, and JPG.
Open Source Alternative to:
Cross-platform, secure password manager
Stars
29,500Last commit
3 days agoLicense
GPL-3.0
KeePassXC is an open-source password manager that securely stores and manages sensitive information across Windows, macOS, and Linux.
Open Source Alternative to:
24/7 screen and audio recorder with AI memory search
Stars
22,074Last commit
19 hours agoLicense
Other
Records your screen and microphone locally, transcribes meetings automatically, and exposes selected work context to compatible AI assistants through its MCP server and local API.
Open Source Alternative to:
Privacy-first browser with ad-blocking and no bloat
Stars
Stars growing over the last 30 days22,008Last commit
1 day agoLicense
GPL-3.0
Chromium-based desktop browser with default ad and tracker blocking, no analytics, native !bangs, split view, and full MV2 extension support.
Open Source Alternative to:
Take control of your identity with a secure, flexible solution
Stars
26,101Last commit
13 hours agoLicense
MIT
authentik is an open-source identity provider that offers self-hosted authentication, authorization, and user management for businesses of all sizes.
Open Source Alternative to:
Zero trust network access that's better than VPN
Stars
23,224Last commit
18 hours agoLicense
AGPL-3.0
Deploy zero trust access to infrastructure, self-hosted apps, and SaaS tools in days. Identity-aware security with seamless user experience.
Open Source Alternative to:
AI workforce platform where agents, skills, and memory live in your repo
Stars
20,318Last commit
11 hours agoLicense
Elastic-2.0
Manages a team of AI agents across your company, with every agent, skill, memory, and connector stored as versioned files in a git repo you own and self-host.
Open Source Alternative to:
Create 2D and 3D games without coding, powered by AI assistance
Stars
Stars growing over the last 30 days28,056Last commit
1 day agoLicense
Unknown
Free, open-source game engine with visual event system, AI tutor, and one-click publishing to Steam, iOS, Android, and web platforms.
Open Source Alternative to:
Self-hosted wiki with AI, compliance, and real-time editing
Stars
22,100Last commit
1 day agoLicense
AGPL-3.0
Self-hosted wiki platform for enterprise teams with real-time collaboration, built-in AI, SSO, RBAC permissions, and compliance support for ITAR, FedRAMP, and GDPR.
Open Source Alternative to:
Open-source data integration for modern teams
Stars
22,265Last commit
13 hours agoLicense
Elastic-2.0
Seamlessly sync data from any source to any destination with a flexible, extensible platform that grows with your data needs.
Open Source Alternative to:
Build custom apps without code, deploy with ease
Stars
24,713Last commit
12 hours agoLicense
Unknown
Open-source no-code platform for creating tailored business applications quickly, with full customization and easy deployment options.
Open Source Alternative to:
Agentic AI framework that runs, learns, and self-corrects
Stars
19,568Last commit
2 days agoLicense
MIT
Autonomous AI agent framework that operates on its own sandboxed computer, creates tools dynamically, manages memory, and executes multi-step workflows with full transparency.
Open Source Alternative to:
Watch YouTube without Google tracking you or showing ads
Stars
Stars growing over the last 30 days25,778Last commit
18 hours agoLicense
AGPL-3.0
Open source front-end for YouTube that strips out ads, tracking, and algorithmic distractions while letting you subscribe to channels and manage playlists.
Open Source Alternative to:
Flexible database meets intuitive spreadsheet interface
Stars
21,929Last commit
12 hours agoLicense
AGPL-3.0
Open-source platform combining powerful database capabilities with a user-friendly spreadsheet interface for efficient data management and collaboration.
Open Source Alternative to:
Free, open-source image editor built for Mac compositing
Stars
Stars growing quickly over the last 30 days17,910Last commit
14 hours agoLicense
MIT
Mac-native Photoshop alternative built around compositing and post-processing workflows, with layers, masks, blend modes, filters, and background removal.
Open Source Alternative to:
AI agents that autonomously fix code and resolve GitHub issues
Stars
20,639Last commit
7 days agoLicense
MIT
State-of-the-art AI agent that uses language models like GPT-4o to autonomously solve GitHub issues, fix bugs, and implement features with configurable YAML setup.
Open Source Alternative to:
Petabyte-scale observability, without the massive bill.
Stars
22,491Last commit
11 hours agoLicense
AGPL-3.0
Monitor logs, metrics, and traces with an open-source observability platform. Achieve petabyte scale with 140x lower storage costs and high performance.
Open Source Alternative to:
Self-hosted CRM for enhanced business relationships
Stars
24,063Last commit
5 days agoLicense
MIT
Open source customer relationship management platform with sales tracking, marketing automation, and customizable workflows for businesses of all sizes.
Open Source Alternative to:
AI-powered DevSecOps for faster, secure software delivery
Stars
24,544Last commit
3 days agoLicense
MIT
A comprehensive AI-powered DevSecOps platform that integrates development, security, and operations, streamlining software delivery and enhancing productivity.
Open Source Alternative to:
Lightning-fast, typo-tolerant search engine for all
Stars
27,046Last commit
15 hours agoLicense
GPL-3.0
Open-source search solution offering blazing speed, typo tolerance, and effortless scalability for developers and businesses.
Open Source Alternative to:
Flexible e-commerce platform for modern businesses
Stars
23,477Last commit
3 days agoLicense
BSD-3-Clause
Headless, API-first e-commerce solution with powerful features for customization, scalability, and seamless integration across channels.
Open Source Alternative to:
Self-hosted newsletter and mailing list manager
Stars
23,972Last commit
3 days agoLicense
AGPL-3.0
Send email campaigns and transactional messages to millions of subscribers with a single high-performance binary backed by Postgres.
Open Source Alternative to:
A native code editor for macOS
Stars
23,086Last commit
9 days agoLicense
MIT
A lightweight, natively built editor. Open source and free forever. Develop any project using any language at speeds like never before.
Open Source Alternative to:
Revolutionize your Git workflow with simultaneous branches
Stars
21,860Last commit
11 hours agoLicense
FSL-1.1-MIT
GitButler is a powerful Git client that enables seamless work on multiple branches concurrently, enhancing your existing workflow.
Open Source Alternative to:
Python-native workflow orchestration for data and ML teams
Stars
24,076Last commit
12 hours agoLicense
Apache-2.0
Orchestrate data pipelines, ML jobs, and agent workflows in plain Python with automatic retries, scheduling, and a unified UI for every run across your infrastructure.
Open Source Alternative to:
Build resilient applications with durable execution workflows
Stars
23,988Last commit
12 hours agoLicense
MIT
Open source platform that eliminates infrastructure complexity by handling failures, network issues, and long-running processes to ensure reliable workflow execution
Open Source Alternative to:
Infrastructure as code in your favorite language
Stars
25,817Last commit
13 hours agoLicense
Apache-2.0
Pulumi enables developers to define and manage cloud infrastructure using familiar programming languages instead of domain-specific languages.
Open Source Alternative to:
Cross-platform terminal with AI built in
Stars
22,593Last commit
17 hours agoLicense
Apache-2.0
Enhance your terminal with AI, file previews, and web browsing. Available on MacOS, Linux, and Windows.
Open Source Alternative to:
Open-source crypto trading bot for market making
Stars
20,709Last commit
7 days agoLicense
Apache-2.0
Automate crypto trading strategies with a powerful, customizable platform. Connect to multiple exchanges and optimize your market making.
Open Source Alternative to:
Self-hosted personal finance manager with double-entry bookkeeping
Stars
24,998Last commit
16 hours agoLicense
AGPL-3.0
Track transactions, budgets, and accounts with a double-entry system, multi-currency support, rule engine, and REST API. Fully self-hostable.
Open Source Alternative to:
Full-stack platform for voice, video, and physical AI agents
Stars
Stars growing over the last 30 days21,822Last commit
19 hours agoLicense
Apache-2.0
Build, test, deploy, and scale voice and video AI agents with an open source framework, inference gateway, telephony integrations, and full observability.
Open Source Alternative to:
Full-featured media center for your TV and beyond
Stars
21,386Last commit
13 hours agoLicense
Unknown
Plays videos, music, TV shows, photos, and games from a single interface, with live TV, PVR recording, and broad format support across devices.
Open Source Alternative to:
Fast, private browser that puts you first
Stars
23,987Last commit
15 hours agoLicense
MPL-2.0
A secure web browser that blocks ads and trackers, protects privacy, and loads pages faster while saving data and battery life.
Open Source Alternative to:
Self-hosted music streaming for your personal collection
Stars
24,363Last commit
16 hours agoLicense
GPL-3.0
Open source music server that streams your personal library via a web player or any Subsonic-compatible mobile app on iOS and Android.
Open Source Alternative to:
Collect, transform, and route logs and metrics in one tool
Stars
22,766Last commit
2 days agoLicense
MPL-2.0
Rust-built observability pipeline tool that collects, transforms, and routes logs and metrics across 47 sources and 62 sinks with no runtime dependencies.
Open Source Alternative to:
Turn production traffic into regression tests, no code changes
Stars
18,752Last commit
11 hours agoLicense
Apache-2.0
Captures real API traffic and dependency calls via eBPF to generate tests and mocks automatically, then replays them in CI to catch regressions before they ship.
Open Source Alternative to:
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Tools that analyze website performance, optimize content visibility, track rankings, and improve search engine results.
AI Coding Agent Orchestrators
Tools that run and coordinate multiple AI coding agents in parallel across isolated git worktrees, also known as agent harnesses or agentic dev environments.
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Applications that convert spoken words into text for faster writing across any application.
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Enterprise Resource Planning systems integrating various business functions.
Scraping Platforms & SDKs
Platforms and SDKs for building web scraping solutions.
Bright Data – Web data for AI agents and apps. Built-in unblocking, proxies, and ready-made APIs.
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