Open Source Alternatives
  • Alternatives
  • Categories
    Categories by size892 projects
    • Developer Tools463
    • AI & Machine Learning404
    • Web Development196
    • Business & Productivity194
    • Communication & Collaboration128
    • Security & Monitoring128
    • IT Management123
    • Cloud & Hosting108
    • Product & Project Management106
    • Data & Analytics104
    Browse all 21 categoriesLLMOps & AI Tooling, Design & Creative and 9 more
  • Blog
  • Advertise
SearchNotion, Slack, password manager.../
Submit
Open Source Alternatives
  • Alternatives
    • Developer Tools463
    • AI & Machine Learning404
    • Web Development196
    • Business & Productivity194
    • Communication & Collaboration128
    • Security & Monitoring128
    • Browse all 21 categories
  • Blog
  • Advertise
Submit your project

New open source projects by email

The projects we add and every new guide. Free, unsubscribe any time.

Open Source Alternatives LogoOpen Source Alternatives

Handpicked Open Source Alternatives to Paid Softwares

Product

  • Categories
  • Tag
  • Advertise

Resources

  • Blog
  • Collection
  • Submit

Company

  • Privacy Policy
  • Terms of Service
  • Refund Policy
  • Sitemap

Alternatives

  • Claude Code
  • Jira
  • Notion
  • Slack
  • Linear
  • Wispr Flow
  • All alternatives
© 2026 Open Source Alternatives. All rights reserved.
Open SourceAlternatives

Category

Open Source Developer Tools

  • All
  • Developer Tools
  • Web Development
  • Backend Development
  • APIs & Integration
  • DevOps & CI/CD
  • Cloud & Hosting
  • LLMOps & AI Tooling
  • Databases & Storage
  • No-Code & Low-Code
  • Customer Support
  • IT Management
  • Marketing & Growth
  • Finance & Fintech
  • Product & Project Management
  • AI & Machine Learning
  • Data & Analytics
  • Communication & Collaboration
  • Business & Productivity
  • Design & Creative
  • Security & Monitoring
  • Web & App Development

463 projects, sorted by GitHub stars.

LibreChat

Alternative toChatGPT

One self-hosted interface for every AI model you use

  • 46,147 GitHub stars
  • MITLicence MIT
  • #AI Agents

omarchy

Alternative tomacOS

DHH's opinionated Linux distribution for developer workstations

  • 45,322 GitHub stars
  • MITLicence MIT

Zen Browser

Alternative toSigmaOS

Focus-first Firefox fork with workspaces and split-view browsing

  • 45,037 GitHub stars
  • MPL-2.0Licence MPL-2.0

Herdr

Alternative toConductor

Agent runtime that keeps terminals alive across machines

  • 44,852 GitHub stars
  • Apache-2.0Licence Apache-2.0

sub2api

Alternative toOpenRouter

One API gateway for Claude, OpenAI, Gemini, and Grok subscriptions

  • 44,454 GitHub stars
  • LGPL-3.0Licence LGPL-3.0

agent-browser

Alternative toBrowserbase

Browser automation CLI with ref-based snapshots for AI agents

  • 44,324 GitHub stars
  • Apache-2.0Licence Apache-2.0
  • #AI Agents

reverse-skill

Alternative toRevEng.AI

AI skill router for reverse engineering and penetration testing

  • 42,784 GitHub stars
  • MITLicence MIT

DuckDB

Alternative toMotherDuck

Fast in-process SQL analytics database, no server needed

  • 42,318 GitHub stars
  • MITLicence MIT
  • #Database

Xray-core

Alternative toAstrill VPN

Open source proxy core with XTLS, VLESS, and REALITY protocols

  • 42,209 GitHub stars
  • MPL-2.0Licence MPL-2.0

Llvm Project

Alternative toIntel oneAPI C++ Compiler

Modular compiler infrastructure behind Clang, Rust, and Swift.

  • 41,148 GitHub stars
  • CustomLicence Apache-2.0 with LLVM Exceptions

ToolJet

Alternative toRetool

Build internal tools with a drag-and-drop UI and 50+ connectors

  • 41,110 GitHub stars
  • AGPL-3.0Licence AGPL-3.0
  • #No Code

DeepSeek TUI

Alternative toClaude Code

A coding agent that lives in your terminal.

  • 41,099 GitHub stars
  • MITLicence MIT
  • Previous
  • 1
  • More pages
  • 7
  • 8
  • 9
  • More pages
  • 39
  • Next