Decision Workspace
agent-to-agent vs a2a-protocol-sdk vs ra2a
Side-by-side comparison of Rust crates
41
agent-to-agent
experimentalv0.1.0
Google A2A (Agent-to-Agent) protocol implementation in Rust — inter-agent communication, capability discovery, task delegation
58
a2a-protocol-sdk
experimentalv0.6.0
Agent2Agent (A2A) protocol v1.0 — convenience umbrella re-export crate
53
ra2a
experimentalv0.10.1
A Rust implementation of the Agent2Agent (A2A) Protocol SDK
Core Metrics
| agent-to-agent | a2a-protocol-sdk | ra2a | |
|---|---|---|---|
| Health Score | 41 | 58 | 53 |
| Total Downloads | 20 | 305 | 2.0K |
| 30d Downloads | 0 | 0 | 0 |
| Dependents | 0 | 0 | 22 |
| Releases | 1 | 9 | 18 |
| Last Updated | 41d ago | 33d ago | 96d ago |
| Age | 1m | 4m | 5m |
Health Breakdown
agent-to-agent
Maintenance
10
Quality
13
Community
6
Popularity
2
Documentation
10
a2a-protocol-sdk
Maintenance
17
Quality
17
Community
6
Popularity
3
Documentation
15
ra2a
Maintenance
14
Quality
15
Community
10
Popularity
4
Documentation
10
Technical Details
| agent-to-agent | a2a-protocol-sdk | ra2a | |
|---|---|---|---|
| Version | 0.1.0 | 0.6.0 | 0.10.1 |
| Stable (≥1.0) | ✗ No | ✗ No | ✗ No |
| License | MIT OR Apache-2.0 | Apache-2.0 | MIT OR Apache-2.0 |
| Dependencies | 5 | 3 | 25 |
| Crate Size | 11KB | 23KB | 100KB |
| Features | 0 | 9 | 10 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2021 | 2021 | 2024 |
| MSRV | — | 1.93 | — |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •a2a-protocol-sdk leads with a health score of 58/100, but none of the options score above 80.
- •ra2a has the most downloads (2.0K), suggesting wider adoption.