Decision Workspace
crabbyq vs mqtt5 vs rumqttd
Side-by-side comparison of Rust crates
47
crabbyq
experimentalv1.0.0
A declarative async Rust framework for message-driven microservices.
63
mqtt5
experimentalv0.37.1
Complete MQTT v5.0 platform with high-performance async client and full-featured broker supporting TCP, TLS, WebSocket, authentication, bridging, and resource monitoring
49
rumqttd
growingv0.20.0
rumqttd is a high performance MQTT broker written in Rust which is light weight and embeddable
Core Metrics
| crabbyq | mqtt5 | rumqttd | |
|---|---|---|---|
| Health Score | 47 | 63 | 49 |
| Total Downloads | 19 | 9.2K | 609.3K |
| 30d Downloads | 0 | 2.8K | 17.6K |
| Dependents | 0 | 99 | 150 |
| Releases | 1 | 61 | 37 |
| Last Updated | 88d ago | 2d ago | 287d ago |
| Age | 2m | 11m | 6y 2m |
Health Breakdown
crabbyq
Maintenance
8
Quality
18
Community
6
Popularity
2
Documentation
13
mqtt5
Maintenance
19
Quality
13
Community
11
Popularity
5
Documentation
15
rumqttd
Maintenance
9
Quality
10
Community
11
Popularity
7
Documentation
12
Technical Details
| crabbyq | mqtt5 | rumqttd | |
|---|---|---|---|
| Version | 1.0.0 | 0.37.1 | 0.20.0 |
| Stable (≥1.0) | ✓ Yes | ✗ No | ✗ No |
| License | MIT | MIT OR Apache-2.0 | Apache-2.0 |
| Dependencies | 15 | 56 | 30 |
| Crate Size | 42KB | 408KB | 122KB |
| Features | 7 | 13 | 7 |
| Yanked % | 0.0% | 0.0% | 5.4% |
| Edition | 2024 | 2021 | 2021 |
| MSRV | — | 1.88 | 1.70.0 |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •mqtt5 leads with a health score of 63/100, but none of the options score above 80.
- •rumqttd has the most downloads (609.3K), suggesting wider adoption.
- •rumqttd is depended on by 150 crates — strongest ecosystem trust.
- •mqtt5, rumqttd are pre-1.0 — API may change.