head to head · open source
CryptPad vs ZenConverter
CryptPad has 7,927 GitHub stars, 849 forks, 401 open issues and last shipped yesterday. ZenConverter has 1,403 stars, 48 forks, 3 open issues and last shipped 5 days ago. CryptPad leads on adoption by 465% (7,927 vs 1,403 stars). CryptPad is written in JavaScript under AGPL-3.0; ZenConverter is written in Kotlin under AGPL-3.0. CryptPad has attracted 11% as many forks as stars, ZenConverter 3%. CryptPad was the more recently maintained of the two, and both are self-hostable with no licence fee.
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
| CryptPad | ZenConverter | |
|---|---|---|
| GitHub stars | ★ 7.9K | ★ 1.4K |
| License | AGPL-3.0 | AGPL-3.0 |
| Written in | JavaScript | Kotlin |
| Last push | 2026-09-18 | 2026-09-14 |
| Forks | ⑂ 849 | ⑂ 48 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick CryptPad if
- You weight community size — 7.9K 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 ZenConverter if
- You want the ZenConverter feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches Kotlin
- You evaluated both and ZenConverter fits your workflow better
About CryptPad
CryptPad is an open source collaboration suite built around end to end encryption, written in JavaScript and released under the AGPL 3.0. It lives in the JavaScript and real time collaboration ecosystem, using ChainPad to synchronize changes to documents in real time. The suite covers documents, sheets, presentations, forms, kanban boards, code, rich text, and whiteboards, all reachable from a single CryptDrive, and it is positioned as an open alternative to Google Docs.
read the full CryptPad overview →
About ZenConverter
ZenConverter is a local first file converter for Android, written in Kotlin with Jetpack Compose, for people who want to convert video, audio, and image files on their own phone instead of uploading them to someone else's server.
read the full ZenConverter overview →
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Frequently asked questions
Is CryptPad or ZenConverter more popular?
CryptPad has 7,927 GitHub stars and ZenConverter has 1,403. CryptPad has the larger community by that measure.
Are CryptPad and ZenConverter free?
Both are open source. CryptPad is licensed under AGPL-3.0 and ZenConverter under AGPL-3.0. Neither carries a licence fee.
What is the difference between CryptPad and ZenConverter?
CryptPad is written in JavaScript and ZenConverter in Kotlin. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, CryptPad or ZenConverter?
Choose CryptPad if you want the larger community (7,927 stars) or its AGPL-3.0 licence terms. Choose ZenConverter if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.