Decision Workspace
sonar-mcp vs sonar-core vs steel-memory
Side-by-side comparison of Rust crates
40
sonar-mcp
experimentalv0.3.0
MCP server for sonar code search. Drop-in compatible with semble. Works with Claude Code, Cursor, Codex, OpenCode.
41
sonar-core
experimentalv0.3.0
Fast hybrid code search engine for agents: tree-sitter chunking, BM25, static embeddings, RRF. Rust translation of semble.
53
steel-memory
experimentalv0.1.3
A spatial memory palace for AI agents with semantic vector search, knowledge graphs, and MCP tools
Core Metrics
| sonar-mcp | sonar-core | steel-memory | |
|---|---|---|---|
| Health Score | 40 | 41 | 53 |
| Total Downloads | 18 | 214 | 3.2K |
| 30d Downloads | 0 | 0 | 1.1K |
| Dependents | 0 | 2 | 1 |
| Releases | 1 | 1 | 3 |
| Last Updated | 47d ago | 47d ago | 25d ago |
| Age | 1m | 1m | 3m |
Health Breakdown
sonar-mcp
Maintenance
10
Quality
12
Community
6
Popularity
2
Documentation
10
sonar-core
Maintenance
10
Quality
11
Community
7
Popularity
3
Documentation
10
steel-memory
Maintenance
17
Quality
12
Community
7
Popularity
4
Documentation
13
Technical Details
| sonar-mcp | sonar-core | steel-memory | |
|---|---|---|---|
| Version | 0.3.0 | 0.3.0 | 0.1.3 |
| Stable (≥1.0) | ✗ No | ✗ No | ✗ No |
| License | MIT | MIT | MIT |
| Dependencies | 8 | 19 | 12 |
| Crate Size | 26KB | 59KB | 45KB |
| Features | 0 | 0 | 0 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2024 | 2024 | 2024 |
| MSRV | — | — | — |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •steel-memory leads with a health score of 53/100, but none of the options score above 80.