head to head · open source
koodo-reader vs Tangent
koodo-reader has 28,699 GitHub stars, 2,148 forks, 271 open issues and last shipped 2 days ago. Tangent has 583 stars, 41 forks, 112 open issues and last shipped yesterday. koodo-reader leads on adoption by 4,823% (28,699 vs 583 stars). koodo-reader is written in JavaScript under AGPL-3.0; Tangent is written in TypeScript under Apache-2.0. koodo-reader has attracted 7% as many forks as stars, Tangent 7%. Tangent was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (markdown), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| koodo-reader | Tangent | |
|---|---|---|
| GitHub stars | ★ 29K | ★ 583 |
| License | AGPL-3.0 | Apache-2.0 |
| Written in | JavaScript | TypeScript |
| Last push | 2026-11-01 | 2026-11-02 |
| Forks | ⑂ 2.1K | ⑂ 41 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick koodo-reader if
- You weight community size — 29K stars and counting
- You want the AGPL-3.0 license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick Tangent if
- You want the Tangent feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches TypeScript
- You evaluated both and Tangent fits your workflow better
About koodo-reader
简体中文 हिंदी Português Indonesian English Türkçe Koodo Reader A cross platform ebook reader Download Preview Roadmap Document Plugins Preview Features Format support: EPUB ( .epub ) PDF ( .pdf ) DRM free Mobipocket ( .mobi ) and Kindle ( .azw3 , .azw ) Plain text ( .txt ) FictionBook ( .fb2 ) Comic book archive ( .cbr , .cbz , .cbt , .cb7 ) Rich text ( .md , .docx ) HyperText ( .html , .xml , .xhtml , .mhtml , .htm ) Platform support: Windows , macOS , Linux , Android , iOS and Web Sync and backup your data with OneDrive , Google Drive , Dropbox , iCloud , MEGA , pCloud , Yandex Disk , Box , FTP , SFTP , WebDAV…
read the full koodo-reader overview →
About Tangent
Tangent This is the monorepo for the Tangent project. Tangent is a local note writing / personal knowledge management tool. It was heavily inspired by Obsidian, and has drifted in its own direction. It uses [[Wiki Links]] and a slightly customized markdown syntax. Notes are fully styled as you write. Markdown syntax is hidden and revealed as needed. Other key features: An innovative, two dimensional connected map of your navigation and linking history. "Sliding Panel" UX inspired by Andy Matuschak's notes. Writing focus mode: highlight your current paragraph, line, or sentence. Customizable note views: view your…
read the full Tangent overview →
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Frequently asked questions
Is koodo-reader or Tangent more popular?
koodo-reader has 28,699 GitHub stars and Tangent has 583. koodo-reader has the larger community by that measure.
Are koodo-reader and Tangent free?
Both are open source. koodo-reader is licensed under AGPL-3.0 and Tangent under Apache-2.0. Neither carries a licence fee.
What is the difference between koodo-reader and Tangent?
koodo-reader is written in JavaScript and Tangent in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, koodo-reader or Tangent?
Choose koodo-reader if you want the larger community (28,699 stars) or its AGPL-3.0 licence terms. Choose Tangent if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.