hash-calendar vs NeoMutt
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
NeoMutt
Feature-rich terminal email client
| Feature | hash-calendar | NeoMutt |
|---|---|---|
| Category | File Sync & Storage | Mail Servers |
| License | MIT | GPL-2.0 |
| Language | JavaScript | C |
| Setup difficulty | Medium | Medium |
| Min. RAM | 512 MB | 64 MB |
| Deployment | bare-metal | binary, source |
| GitHub stars | ★ 69 | ★ 3,799 |
| First released | 2026 | 2016 |
| 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 NeoMutt if…
- Released under the GPL-2.0 license
- Active community (3.8k GitHub stars)
- Written in C
- Tiny footprint — runs in 64 MB RAM
Frequently asked questions
Is hash-calendar or NeoMutt better?
Neither is universally better. NeoMutt has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.
Are hash-calendar and NeoMutt free and open-source?
Yes. hash-calendar is licensed under MIT and NeoMutt under GPL-2.0. Both can be self-hosted at no software cost.
Can I run hash-calendar and NeoMutt with Docker?
hash-calendar: check the project docs for container support. NeoMutt: check the project docs for container support.