hash-calendar vs Betterbird
A side-by-side comparison of two self-hosted apps from related categories — licensing, setup difficulty, resource needs, and what each one replaces.
Not the right match-up?
hash-calendar
Lightweight calendar app where the data lives in the URL hash
VS
Betterbird
Community-enhanced fork of the Thunderbird email client
| Feature | hash-calendar | Betterbird |
|---|---|---|
| Category | File Sync & Storage | Mail Servers |
| License | MIT | MPL-2.0 |
| Language | JavaScript | Shell |
| Setup difficulty | Medium | Easy |
| Min. RAM | 512 MB | 256 MB |
| Deployment | bare-metal | binary, source |
| GitHub stars | ★ 69 | ★ 948 |
| First released | 2026 | 2022 |
| Replaces | Google Agenda, Microsoft Outlook | Microsoft Outlook |
Why pick each one
Choose hash-calendar if…
- Released under the MIT license
- Written in JavaScript
- Lightweight — runs in 512 MB RAM
Choose Betterbird if…
- Released under the MPL-2.0 license
- Easy to set up — beginner-friendly
- Written in Shell
- Tiny footprint — runs in 256 MB RAM
Frequently asked questions
Is hash-calendar or Betterbird better?
Betterbird is the stronger all-round pick: it has both the larger community and the simpler easy setup. Consider hash-calendar if its specific feature set fits your needs better.
Are hash-calendar and Betterbird free and open-source?
Yes. hash-calendar is licensed under MIT and Betterbird under MPL-2.0. Both can be self-hosted at no software cost.
Can I run hash-calendar and Betterbird with Docker?
hash-calendar: check the project docs for container support. Betterbird: check the project docs for container support.