Choose My Stack
Join free
Own your stack

Open-source alternatives to the tools you already pay for

Self-hostable, privacy-friendly replacements for popular productivity software — vetted, categorized and ranked by GitHub traction.

78 vetted tools·3.6M+ combined GitHub stars·no pay-to-rank
Most replaced
Claude Code11 alternativesNotion5 alternativesAirtable3 alternativesSlack3 alternativesTodoist2 alternativesTrello2 alternativesZapier2 alternatives
Top pick
Cal.comScheduling for everyone

Skip the setup — get fully-managed, open-source scheduling with team round-robin, workflows and 100+ integrations. Self-host or let Cal handle it.

Try Cal.com free
Want your tool here? Advertise →
Order by
78 open-source tools · showing 139
OpenClaw
384kCustom

A personal AI assistant that acts, not just answers.

Alternative toChatGPTClaude
Hermes Agent
219.9kMIT

Desktop AI agent with persistent memory across platforms.

Alternative toChatGPT
n8n
197.8kFair-code

Workflow automation with 400+ integrations and native AI nodes.

Alternative toZapier
OpenCode
189.3kMIT

Open-source AI coding agent for the terminal with 75+ LLM providers.

Alternative toClaude Code
Open WebUI
146.6kBSD-3

Self-hosted AI chat interface for any LLM, local or API.

Alternative toClaudeChatGPT
Excalidraw
128.3kMIT

Virtual whiteboard for sketching hand-drawn diagrams together.

Alternative toMiro
Zed
87.5kGPL-3.0 / AGPL-3.0

Blazing-fast, Rust-built code editor with native AI and collaboration.

Alternative toClaude CodeCursor
OpenHands
82kMIT

Autonomous AI dev agents that plan and ship code changes end-to-end.

Alternative toClaude CodeDevin
LobeChat
80.8kApache-2.0

Open-source AI chat framework with agents and plugins.

Alternative toClaudeChatGPT
OpenCut
78.4kMIT

Free, open-source video editor that runs in the browser.

Alternative toCapCut
AppFlowy
74.2kAGPL-3.0

AI workspace for docs, wikis and projects — fully local-first.

Alternative toNotion
AFFiNE
70.8kMPL-2.0

Local-first workspace merging docs, whiteboards and databases.

Alternative toNotionMiro
Cline
65kApache-2.0

Agentic AI coding assistant for VS Code with multi-file edits.

Alternative toClaude CodeCursor
NocoDB
64.3kAGPL-3.0

Turn any database into a smart spreadsheet with views and APIs.

Alternative toAirtable
AnythingLLM
63.8kMIT

All-in-one AI workspace — chat with your documents, any model.

Alternative toClaudeChatGPT
Memos
61.8kMIT

Self-hosted, private note-taking built around a timeline.

Alternative toNotion
Penpot
57.3kMPL-2.0

Open-source design and prototyping platform for teams.

Alternative toFigmaCanva
Joplin
55.7kAGPL-3.0

Encrypted markdown notes with web clipper and sync everywhere.

Alternative toEvernote
Plane
55kAGPL-3.0

Issue tracking and project planning with cycles and modules.

Alternative toLinearJira
Flowise
54.9kApache-2.0

Drag-and-drop builder for LLM apps and AI agents.

Alternative ton8n
Huginn
49.7kMIT

Self-hosted agents that watch the web and act for you.

Alternative toZapierIFTTT
tldraw
49.3kCustom

Infinite canvas and whiteboard SDK with a delightful feel.

Alternative toMiro
Aider
47.7kApache-2.0

Terminal AI pair programmer that edits your codebase with any model.

Alternative toClaude Code
Cal.com
46.8kAGPL-3.0

Scheduling infrastructure — booking links you fully control.

Alternative toCalendly
Rocket.Chat
45.9kMIT

Customizable team chat with voice, video and omnichannel.

Alternative toSlack
SiYuan
45.4kAGPL-3.0

Block-based PKM with backlinks and spaced-repetition flashcards.

Alternative toNotion
Logseq
44.1kAGPL-3.0

Privacy-first outliner for networked notes and daily journaling.

Alternative toObsidianRoam
Puter
42.8kAGPL-3.0

The open-source internet OS — a personal cloud in your browser.

Alternative toGoogle Drive
Outline
39.8kBSL

Fast team knowledge base and wiki with real-time editing.

Alternative toNotionConfluence
Novu
39.4kMIT

Open-source notification infrastructure for products.

Alternative toCustomer.io
Mattermost
38.5kMIT / Apache-2.0

Secure team messaging and collaboration for technical teams.

Alternative toSlack
Umami
37.9kMIT

Simple, fast, privacy-focused analytics you can host yourself.

Alternative toGoogle Analytics
Open Notebook
36kMIT

Privacy-first, open-source alternative to Google NotebookLM.

Alternative toNotebookLM
Continue
35.1kApache-2.0

Open-source AI code assistant for VS Code and JetBrains.

Alternative toClaude CodeGitHub Copilot
Tabby
33.8kApache-2.0

Self-hosted AI coding assistant with a privacy-first design.

Alternative toClaude CodeGitHub Copilot
Postiz
33.7kAGPL-3.0

Open-source social media scheduling across every network.

Alternative toHootsuiteBuffer
Pythagora
33.7kCustom (FSL)

AI dev agent that builds full apps from a description.

Alternative toLovableBolt
Chroma
28.9kApache-2.0

Open-source embedding database for AI apps and RAG.

Alternative toPinecone
Void
28.9kApache-2.0

Open-source VS Code fork with built-in AI and full privacy control.

Alternative toClaude CodeCursor

People are looking for alternatives to…

Notion

Notion is an all-in-one workspace that combines notes, docs, wikis, databases and lightweight project management in one flexible, block-based tool.

8 alternatives
Claude Code

Claude Code is a terminal-based AI coding assistant built on Anthropic's Claude models.

8 alternatives
n8n

n8n is a source-available workflow automation tool with a visual node editor, 400+ integrations and native AI/LLM nodes.

8 alternatives
Lovable

Lovable is an AI app builder: you describe the product you want in chat, and it generates a working full-stack web app — typically React with Tailwind on the front end and Supabase for auth and data — that you can iterate on with follow-up prompts, then deploy and share from the same browser tab.

10 alternatives

All 78 open-source tools, A–Z

Every tool in the directory — jump straight to any profile.

Know an open-source gem we missed?
Suggest it and we'll review it for the directory.
Submit a tool →