Decision Workspace
lettr vs ferrum-email-core vs ferrum-email-render
Side-by-side comparison of Rust crates
57
lettr
experimentalv1.1.0
Official Rust SDK for the Lettr Email API.
50
ferrum-email-core
experimentalv0.1.8
Core types, traits, and node tree for the Ferrum Email framework
49
ferrum-email-render
experimentalv0.1.7
Rendering engine for Ferrum Email — Node tree to HTML, plain text, and CSS inlining
Core Metrics
| lettr | ferrum-email-core | ferrum-email-render | |
|---|---|---|---|
| Health Score | 57 | 50 | 49 |
| Total Downloads | 89 | 408 | 312 |
| 30d Downloads | 0 | 0 | 0 |
| Dependents | 0 | 35 | 19 |
| Releases | 6 | 9 | 8 |
| Last Updated | 33d ago | 15d ago | 16d ago |
| Age | 3m | 2m | 2m |
Health Breakdown
lettr
Maintenance
17
Quality
17
Community
6
Popularity
2
Documentation
15
ferrum-email-core
Maintenance
12
Quality
15
Community
10
Popularity
3
Documentation
10
ferrum-email-render
Maintenance
12
Quality
14
Community
10
Popularity
3
Documentation
10
Technical Details
| lettr | ferrum-email-core | ferrum-email-render | |
|---|---|---|---|
| Version | 1.1.0 | 0.1.8 | 0.1.7 |
| Stable (≥1.0) | ✓ Yes | ✗ No | ✗ No |
| License | MIT | MIT OR Apache-2.0 | MIT OR Apache-2.0 |
| Dependencies | 8 | 0 | 1 |
| Crate Size | 36KB | 7KB | 7KB |
| Features | 4 | 0 | 0 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2021 | 2024 | 2024 |
| MSRV | 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.
- •ferrum-email-core has the most downloads (408), suggesting wider adoption.
- •ferrum-email-core, ferrum-email-render are pre-1.0 — API may change.