Decision Workspace
parcelwing vs unsent vs lettr
Side-by-side comparison of Rust crates
47
parcelwing
experimentalv0.1.0
Official Rust SDK for the Parcel Wing API.
47
unsent
growingv1.0.3
Rust SDK for the Unsent API - Send transactional emails with ease
57
lettr
experimentalv1.1.0
Official Rust SDK for the Lettr Email API.
Core Metrics
| parcelwing | unsent | lettr | |
|---|---|---|---|
| Health Score | 47 | 47 | 57 |
| Total Downloads | 16 | 120 | 89 |
| 30d Downloads | 0 | 0 | 0 |
| Dependents | 0 | 0 | 0 |
| Releases | 1 | 4 | 6 |
| Last Updated | 13d ago | 131d ago | 33d ago |
| Age | 13d | 6m | 3m |
Health Breakdown
parcelwing
Maintenance
12
Quality
13
Community
6
Popularity
1
Documentation
15
unsent
Maintenance
12
Quality
17
Community
3
Popularity
2
Documentation
13
lettr
Maintenance
17
Quality
17
Community
6
Popularity
2
Documentation
15
Technical Details
| parcelwing | unsent | lettr | |
|---|---|---|---|
| Version | 0.1.0 | 1.0.3 | 1.1.0 |
| Stable (≥1.0) | ✗ No | ✓ Yes | ✓ Yes |
| License | MIT | MIT | MIT |
| Dependencies | 7 | 6 | 8 |
| Crate Size | 26KB | 37KB | 36KB |
| Features | 0 | 0 | 4 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2021 | 2024 | 2021 |
| MSRV | 1.75 | — | 1.70 |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •lettr leads with a health score of 57/100, but none of the options score above 80.
- •unsent has the most downloads (120), suggesting wider adoption.
- •parcelwing is pre-1.0 — API may change.