Open-source alternatives to popular software
OSS Alternatives covers a small number of proprietary tools in depth rather than a large, shallow directory. Each page below ranks genuinely open-source alternatives by GitHub activity and spells out license, self-hosting, and pricing so you can pick one with confidence.
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Knowledge Management alternatives
Instapaper
Read-it-later service for saving and reading articles
10 alternatives
Pinboard
Minimalist paid bookmarking service
10 alternatives
GitBook
Documentation platform for teams and products
3 alternatives
Tana
AI-powered knowledge graph and notes workspace
12 alternatives
Nuclino
Team wiki and collaborative workspace
11 alternatives
Omnivore
Read-it-later app for saving, highlighting, and reading articles
8 alternatives
Scrivener
Writing app for long-form manuscripts, research, and structure
5 alternatives
Craft
Document and notes app with a polished, native Apple experience
11 alternatives
Roam Research
Networked note-taking tool built on bidirectional links and daily notes
13 alternatives
Mintlify
Hosted documentation platform with AI search and API reference
4 alternatives
Logseq
Local-first outliner and knowledge base with bidirectional links
16 alternatives
Confluence
Collaborative knowledge management and team wiki platform
10 alternatives