# altero vs Unison

> Two self-hosted [File Sync projects](https://selfhost.directory/file-sync), compared on the numbers selfhost.directory tracks live: score, popularity, release cadence and setup effort.

| | altero | Unison |
|---|---|---|
| Score | 47/100 | 65/100 ✓ |
| Rank in category | #8 of 15 in File Sync | #2 of 15 in File Sync |
| GitHub stars | 195 | 5 559 ✓ |
| Stars, last 30 days | — | +66 |
| Stable releases, 12 months | 2 | 2 |
| Latest release | v0.9.0 · 20 Aug 2026 ✓ | v2.54.0 · 1 May 2026 |
| Setup | Moderate | Moderate ✓ |
| Official Docker image | Yes ✓ | No |
| License | AGPL-3.0 | GPL-3.0 |
| Main language | Typescript | OCaml |

## Which one should you pick?

Unison scores 65/100 against 47/100 for altero, so it is the safer default.

Unison is growing faster right now (+66 stars in 30 days).

## Details

- [altero](https://selfhost.directory/project/altero) (markdown: https://selfhost.directory/project/altero.md)
- [Unison](https://selfhost.directory/project/unison) (markdown: https://selfhost.directory/project/unison.md)

---
Source: https://selfhost.directory/compare/altero-vs-unison