Decision Workspace
rstructor vs instructors vs schemalint
Side-by-side comparison of Rust crates
58
rstructor
growingv0.4.0
Get structured, validated data out of LLMs as native Rust structs and enums. Derive a type and rstructor generates the JSON Schema, prompts the model, parses the reply, and retries on validation errors — across OpenAI, Anthropic Claude, Google Gemini, and xAI Grok. The Rust answer to Python's Pydantic + Instructor.
53
instructors
experimentalv1.3.4
Type-safe structured output extraction from LLMs. The Rust instructor.
48
schemalint
experimentalv1.1.0
Static analysis tool for JSON Schema compatibility with LLM structured-output providers
Core Metrics
| rstructor | instructors | schemalint | |
|---|---|---|---|
| Health Score | 58 | 53 | 48 |
| Total Downloads | 4.6K | 1.3K | 27 |
| 30d Downloads | 0 | 0 | 0 |
| Dependents | 14 | 0 | 0 |
| Releases | 28 | 12 | 2 |
| Last Updated | 33d ago | 36d ago | 10d ago |
| Age | 1y 3m | 4m | 10d |
Health Breakdown
rstructor
Maintenance
17
Quality
15
Community
9
Popularity
4
Documentation
13
instructors
Maintenance
17
Quality
13
Community
6
Popularity
4
Documentation
13
schemalint
Maintenance
13
Quality
12
Community
6
Popularity
2
Documentation
15
Technical Details
| rstructor | instructors | schemalint | |
|---|---|---|---|
| Version | 0.4.0 | 1.3.4 | 1.1.0 |
| Stable (≥1.0) | ✗ No | ✓ Yes | ✓ Yes |
| License | MIT | MIT | MIT OR Apache-2.0 |
| Dependencies | 16 | 14 | 18 |
| Crate Size | 222KB | 65KB | 144KB |
| Features | 11 | 3 | 0 |
| Yanked % | 0.0% | 16.7% | 0.0% |
| Edition | 2024 | 2024 | 2021 |
| MSRV | — | — | 1.80 |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •rstructor leads with a health score of 58/100, but none of the options score above 80.
- •rstructor is pre-1.0 — API may change.