Decision Workspace
instructors vs rstructor vs umf
Side-by-side comparison of Rust crates
52
instructors
experimentalv1.3.0
Type-safe structured output extraction from LLMs. The Rust instructor.
57
rstructor
growingv0.2.9
Rust equivalent of Python's Instructor + Pydantic: Extract structured, validated data from LLMs (OpenAI, Anthropic, Grok, Gemini) using type-safe Rust structs and enums
64
umf
experimentalv0.2.4
Universal Message Format (UMF) - Provider-agnostic message representation for LLM interactions with ChatML formatting, internal hub model, and MCP support
Core Metrics
| instructors | rstructor | umf | |
|---|---|---|---|
| Health Score | 52 | 57 | 64 |
| Total Downloads | 109 | 3.0K | 608 |
| 30d Downloads | 109 | 281 | 130 |
| Dependents | 0 | 14 | 212 |
| Releases | 8 | 22 | 10 |
| Last Updated | 19d ago | 42d ago | 16d ago |
| Age | 21d | 1y | 4m |
Health Breakdown
instructors
Maintenance
18
Quality
11
Community
6
Popularity
2
Documentation
15
rstructor
Maintenance
16
Quality
15
Community
9
Popularity
4
Documentation
13
umf
Maintenance
18
Quality
16
Community
12
Popularity
3
Documentation
15
Technical Details
| instructors | rstructor | umf | |
|---|---|---|---|
| Version | 1.3.0 | 0.2.9 | 0.2.4 |
| Stable (≥1.0) | ✓ Yes | ✗ No | ✗ No |
| License | MIT | MIT | MIT OR Apache-2.0 |
| Dependencies | 14 | 12 | 6 |
| Crate Size | 60KB | 128KB | 36KB |
| Features | 3 | 7 | 7 |
| Yanked % | 25.0% | 0.0% | 0.0% |
| Edition | 2024 | 2024 | 2021 |
| MSRV | 1.94 | — | 1.70 |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •umf leads with a health score of 64/100, but none of the options score above 80.
- •rstructor has the most downloads (3.0K), suggesting wider adoption.
- •umf is depended on by 212 crates — strongest ecosystem trust.
- •rstructor, umf are pre-1.0 — API may change.