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🆓 Open-Source Alternatives

The best free replacements for expensive paid software — self-hosted and open-source alternatives the community trusts.

Made for anyone tired of subscriptions who wants free, proven replacements for paid software.

Subcategories

Alternatives to Paid Software (19)Self-Hosted Applications (51)Free Productivity Tools (51)Free Design Tools (51)Free Business Tools (50)Free AI Tools (50)Free Developer Tools (50)Privacy-Focused Alternatives (50)

Top 50 in Open-Source Alternatives

Across all subcategories, ranked by GitHub stars.

codecrafters-io avatar

build-your-own-x

by codecrafters-io

Master programming by recreating your favorite technologies from scratch.

⭐ 558.3k🍴 52.2k 💻 MarkdownBasic Technical Setup
Updated 14 Jul 2026 Explore Tool
public-apis avatar

public-apis

by public-apis

A collective list of free APIs

⭐ 494.6k🍴 55.2k 💻 PythonCoding Knowledge Recommended
Updated 01 Nov 2026 Explore Tool
awesome-selfhosted avatar

awesome-selfhosted

by awesome-selfhosted

A list of Free Software network services and web applications which can be hosted on your own servers

⭐ 332.8k🍴 15.7k 💻 —Basic Technical Setup
Updated 31 Oct 2026 Explore Tool
affaan-m avatar

ECC

by affaan-m

The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.

⭐ 299.2k🍴 44.2k 💻 JavaScriptCoding Knowledge Recommended
Updated 06 Nov 2026 Explore Tool
n8n-io avatar

n8n

by n8n-io

Fair-code workflow automation platform with native AI capabilities. Combine visual building with custom code, self-host or cloud, 400+ integrations.

⭐ 209.8k🍴 61.4k 💻 TypeScriptNo Coding Required
Updated 08 Nov 2026 Explore Tool
DigitalPlatDev avatar

FreeDomain

by DigitalPlatDev

Free domain registration and practical DNS learning resources for everyone.

⭐ 206.7k🍴 4.6k 💻 MarkdownBasic Technical Setup
Updated 12 Aug 2026 Explore Tool
ohmyzsh avatar

ohmyzsh

by ohmyzsh

🙃 A delightful community-driven (with 2,500+ contributors) framework for managing your zsh configuration. Includes 300+ optional plugins (rails, git, macOS, hub, docker, homebrew,…

⭐ 190.4k🍴 28k 💻 ShellCoding Knowledge Recommended
Updated 07 Nov 2026 Explore Tool
DietrichGebert avatar

ponytail

by DietrichGebert

Makes your AI agent think like the laziest senior dev in the room. The best code is the code you never wrote.

⭐ 186.4k🍴 10.3k 💻 JavaScriptCoding Knowledge Recommended
Updated 29 Oct 2026 Explore Tool
open-webui avatar

open-webui

by open-webui

User-friendly AI Interface (Supports Ollama, OpenAI API, ...)

⭐ 158k🍴 23k 💻 SvelteCoding Knowledge Recommended
Updated 08 Nov 2026 Explore Tool
farion1231 avatar

cc-switch

by farion1231

A cross-platform desktop All-in-One assistant for Claude Code, Codex, OpenCode,DeepSeek Harness and more. Only official website: ccswitch.io

⭐ 150.9k🍴 9.9k 💻 RustCoding Knowledge Recommended
Updated 02 Nov 2026 Explore Tool
Graphify-Labs avatar

graphify

by Graphify-Labs

Turn any codebase, with its docs, SQL schemas, configs, and PDFs, into a queryable knowledge graph. A /graphify skill for Claude Code, Cursor, Codex, and Gemini CLI: local…

⭐ 144k🍴 13.8k 💻 PythonCoding Knowledge Recommended
Updated 08 Nov 2026 Explore Tool
excalidraw avatar

excalidraw

by excalidraw

Virtual whiteboard for sketching hand-drawn like diagrams

⭐ 135.3k🍴 16k 💻 TypeScriptCoding Knowledge Recommended
Updated 07 Nov 2026 Explore Tool
browser-use avatar

browser-use

by browser-use

Open-source Python library for AI browser agents, plus Browser Use Cloud: stealth browsers and a hosted agent API.

⭐ 120.3k🍴 13.4k 💻 PythonCoding Knowledge Recommended
Updated 08 Nov 2026 Explore Tool
immich-app avatar

immich

by immich-app

High performance self-hosted photo and video management solution.

⭐ 117.9k🍴 7.4k 💻 TypeScriptCoding Knowledge Recommended
Updated 01 Nov 2026 Explore Tool
paperclipai avatar

paperclip

by paperclipai

The open-source app everyone uses to manage agents at work

⭐ 112k🍴 18.6k 💻 TypeScriptCoding Knowledge Recommended
Updated 08 Nov 2026 Explore Tool
puppeteer avatar

puppeteer

by puppeteer

JavaScript API for Chrome and Firefox

⭐ 95.8k🍴 9.6k 💻 TypeScriptCoding Knowledge Recommended
Updated 01 Nov 2026 Explore Tool
Stirling-Tools avatar

Stirling-PDF

by Stirling-Tools

#1 PDF Application on GitHub that lets you edit PDFs on any device anywhere

⭐ 95.5k🍴 10k 💻 TypeScriptCoding Knowledge Recommended
Updated 01 Nov 2026 Explore Tool
tt-a1i avatar

archify

by tt-a1i

Turn any idea, plan, or codebase into a beautiful interactive diagram. An agent skill for Claude Code, Codex, and more.

⭐ 94.5k🍴 6.4k 💻 JavaScriptCoding Knowledge Recommended
Updated 08 Nov 2026 Explore Tool
louislam avatar

uptime-kuma

by louislam

A fancy self-hosted monitoring tool

⭐ 93.2k🍴 8.6k 💻 JavaScriptCoding Knowledge Recommended
Updated 02 Nov 2026 Explore Tool
OpenHands avatar

OpenHands

by OpenHands

🙌 OpenHands: AI-Driven Development

⭐ 92.9k🍴 12.4k 💻 TypeScriptCoding Knowledge Recommended
Updated 08 Nov 2026 Explore Tool
rtk-ai avatar

rtk

by rtk-ai

CLI proxy that reduces LLM token consumption by 60-90% on common dev commands. Single Rust binary, zero dependencies

⭐ 85.8k🍴 5.5k 💻 RustCoding Knowledge Recommended
Updated 07 Nov 2026 Explore Tool
cheaper-inference avatar

OmniRoute

by cheaper-inference

Never stop coding. Free MIT AI gateway: one endpoint, 375 providers (150+ free), 1,400+ models Kimi, Claude, GPT, Gemini, GLM, DeepSeek, MiniMax. Works with Claude Code, Codex,…

⭐ 85.5k🍴 12.9k 💻 TypeScriptCoding Knowledge Recommended
Updated 08 Nov 2026 Explore Tool
hoppscotch avatar

hoppscotch

by hoppscotch

Open-Source API Development Ecosystem • https://hoppscotch.io • Offline, On-Prem & Cloud • Web, Desktop & CLI • Open-Source Alternative to Postman, Insomnia

⭐ 80.7k🍴 6.2k 💻 TypeScriptCoding Knowledge Recommended
Updated 31 Oct 2026 Explore Tool
unslothai avatar

unsloth

by unslothai

Local UI to run and train LLMs and diffusion models. Supports GGUF, MLX, Qwen3.8, DeepSeek-V4.1, MiniMax-H3, Gemma 4, FLUX and more.

⭐ 79.2k🍴 7.4k 💻 PythonCoding Knowledge Recommended
Updated 08 Nov 2026 Explore Tool
ComposioHQ avatar

awesome-claude-skills

by ComposioHQ

A curated list of awesome Claude Skills, resources, and tools for customizing Claude AI workflows

⭐ 79k🍴 9.6k 💻 PythonCoding Knowledge Recommended
Updated 18 Sep 2026 Explore Tool
caddyserver avatar

caddy

by caddyserver

Fast and extensible multi-platform HTTP/1-2-3 web server with automatic HTTPS

⭐ 78.6k🍴 5.2k 💻 GoCoding Knowledge Recommended
Updated 01 Nov 2026 Explore Tool
coollabsio avatar

coolify

by coollabsio

An open-source, self-hostable PaaS alternative to Vercel, Heroku & Netlify that lets you easily deploy static sites, databases, full-stack applications and 360+ one-click services…

⭐ 65.5k🍴 5.9k 💻 PHPCoding Knowledge Recommended
Updated 02 Nov 2026 Explore Tool
Ebony-Vinyl avatar

dsh-our-free-model

by Ebony-Vinyl

在 dsh 里装上这个插件即可,无需登录、注册或填 API Key,就能使用包括 DeepSeek V4.1 Flash、Kimi K3 在内的前沿模型——完全免费,不限量。 All you do is install this plugin in dsh: no login, no sign-up, no API key — the frontier…

⭐ 65.5k🍴 1.8k 💻 JavaScriptCoding Knowledge Recommended
Updated 07 Nov 2026 Explore Tool
usememos avatar

memos

by usememos

Memos is an open-source, self-hosted note-taking app that brings your everyday thoughts together in a personal timeline. Your data stays yours, and you choose what to keep private…

⭐ 64.2k🍴 4.9k 💻 GoAdvanced Developer Tool
Updated 01 Nov 2026 Explore Tool
Raphire avatar

Win11Debloat

by Raphire

A simple, lightweight PowerShell script that allows you to remove pre-installed apps, disable telemetry, as well as perform various other changes to declutter and customize your…

⭐ 61.5k🍴 2.7k 💻 PowerShellCoding Knowledge Recommended
Updated 01 Nov 2026 Explore Tool
ayghri avatar

i-have-adhd

by ayghri

A skill to stop your coding agent from burying the answer. ADHD-friendly output.

⭐ 60.4k🍴 3.5k 💻 PythonCoding Knowledge Recommended
Updated 19 Oct 2026 Explore Tool
jellyfin avatar

jellyfin

by jellyfin

The Free Software Media System - Server Backend & API

⭐ 59.1k🍴 5.8k 💻 C#Coding Knowledge Recommended
Updated 09 Nov 2026 Explore Tool
go-gitea avatar

gitea

by go-gitea

Git with a cup of tea! Painless self-hosted all-in-one software development service, including Git hosting, code review, team collaboration, package registry and CI/CD

⭐ 58.8k🍴 7.3k 💻 GoAdvanced Developer Tool
Updated 01 Nov 2026 Explore Tool
pathwaycom avatar

serviette

by pathwaycom

A no-code RAG server that keeps answers in sync with your documents. Works with 8 vector databases. Built on Pathway.

⭐ 58.7k🍴 1.5k 💻 PythonNo Coding Required
Updated 02 Nov 2026 Explore Tool
appwrite avatar

appwrite

by appwrite

The open-source cloud for agents & devs. Including Auth, Databases, Storage, Functions, Messaging, Hosting, Realtime, WAF and more

⭐ 57.8k🍴 5.8k 💻 TypeScriptCoding Knowledge Recommended
Updated 01 Nov 2026 Explore Tool
zylon-ai avatar

private-gpt

by zylon-ai

Complete API layer for private AI applications on local models: RAG, skills, tools, MCP, text-to-sql, and more. Works with any OpenAI-compatible inference server.

⭐ 57.6k🍴 7.6k 💻 PythonCoding Knowledge Recommended
Updated 29 Oct 2026 Explore Tool
odoo avatar

odoo

by odoo

Odoo. Open Source Apps To Grow Your Business.

⭐ 55.5k🍴 34.2k 💻 PythonCoding Knowledge Recommended
Updated 02 Nov 2026 Explore Tool
QuantumNous avatar

new-api

by QuantumNous

Open-source AI gateway. Self-hosted LLM gateway with OpenAI-, Claude- and Gemini-compatible APIs, model routing, access control, usage tracking and cost accounting.

⭐ 51.1k🍴 12.4k 💻 GoCoding Knowledge Recommended
Updated 01 Nov 2026 Explore Tool
ClickHouse avatar

ClickHouse

by ClickHouse

ClickHouse® is a real-time analytics database management system

⭐ 50.7k🍴 9.2k 💻 C++Advanced Developer Tool
Updated 02 Nov 2026 Explore Tool
HKUDS avatar

nanobot

by HKUDS

Your lightweight open-source personal agent.

⭐ 49.9k🍴 8.7k 💻 PythonCoding Knowledge Recommended
Updated 07 Nov 2026 Explore Tool

2,926+ reusable AI agent skills for Claude Code, Codex, Cursor and Gemini CLI. AAS Core adds local catalog discovery, agent-owned selection and plan preview. CLI, MCP and plugins.

⭐ 49.3k🍴 7.2k 💻 PythonCoding Knowledge Recommended
Updated 06 Nov 2026 Explore Tool
Gathin23 avatar

cleanyourtv

by Gathin23

Debloat any Android or Google TV over Wi-Fi and get an Apple TV-style home.

⭐ 49.2k🍴 6.2k 💻 PythonCoding Knowledge Recommended
Updated 01 Nov 2026 Explore Tool
herdrdev avatar

herdr

by herdrdev

the runtime your coding agents live on

⭐ 49.1k🍴 4k 💻 RustCoding Knowledge Recommended
Updated 07 Nov 2026 Explore Tool
GitHubDaily avatar

GitHubDaily

by GitHubDaily

坚持分享 GitHub 上高质量、有趣实用的开源技术教程、开发者工具、编程网站、技术资讯。A list cool, interesting projects of GitHub.

⭐ 48.3k🍴 4.7k 💻 —Basic Technical Setup
Updated 31 Dec 2025 Explore Tool
usebruno avatar

bruno

by usebruno

Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)

⭐ 48k🍴 3.1k 💻 JavaScriptCoding Knowledge Recommended
Updated 01 Nov 2026 Explore Tool

Local code intelligence for developers and AI agents. Connect code, docs and infrastructure in a persistent graph, with CBM Lens, MCP tools, agent integrations and change-aware…

⭐ 48k🍴 3.9k 💻 CCoding Knowledge Recommended
Updated 02 Nov 2026 Explore Tool
gogs avatar

gogs

by gogs

The painless way to host your own Git service

⭐ 47.9k🍴 5.1k 💻 GoAdvanced Developer Tool
Updated 31 Oct 2026 Explore Tool
siyuan-note avatar

siyuan

by siyuan-note

An open-source, privacy-first, self-hosted knowledge workspace where humans and AI agents work together 开源、隐私优先、自托管的知识工作空间,让人与智能体在此协作

⭐ 47k🍴 3.1k 💻 TypeScriptCoding Knowledge Recommended
Updated 01 Nov 2026 Explore Tool
DataTalksClub avatar

data-engineering-zoomcamp

by DataTalksClub

Data Engineering Zoomcamp is a free 9-week course on building production-ready data pipelines. Join the course here 👇🏼

⭐ 46.6k🍴 9k 💻 Jupyter NotebookBasic Technical Setup
Updated 15 Oct 2026 Explore Tool