Compare frameworks
Mastra vs Instructor
Every figure below carries the source that reported it and the moment it was observed. Values that failed validation are withheld rather than shown, and a dash means no source we track carries that field for that framework.
| Field | Mastra | Instructor |
|---|---|---|
| Stars | 28,378 (highest of the compared values)Synced from sourceCurrent2h ago | 13,951Synced from sourceCurrent2h ago |
| downloads | 1,980,114Synced from sourceCurrent2h ago | 13,080,962 (highest of the compared values)Synced from sourceStale1mo ago· past SLA |
| Last commit | 2026-09-28Synced from sourceCurrent2h ago | 2026-09-27Synced from sourceCurrent2h ago |
| Language | typescriptSeeded, unreviewedwritten 1mo ago | pythonSeeded, unreviewedwritten 1mo ago |
| Licence | — | MITSynced from sourceCurrent2h ago |
| Archived | noSynced from sourceCurrent2h ago | noSynced from sourceCurrent2h ago |
| Category | orchestrationSeeded, unreviewedwritten 1mo ago | structured-outputSeeded, unreviewedwritten 1mo ago |
| Contributors | 682Synced from sourceCurrent2h ago | 267Synced from sourceCurrent2h ago |
| Forks | 2871Synced from sourceCurrent2h ago | 1271Synced from sourceCurrent2h ago |
| Maintainer | MastraSeeded, unreviewedwritten 1mo ago | 567 LabsSeeded, unreviewedwritten 1mo ago |
| npm downloads, monthly | 5868462Synced from sourceCurrent2h ago | — |
| npm downloads, weekly | 1980114Synced from sourceCurrent2h ago | — |
| npm package | @mastra/coreSynced from sourceCurrent2h ago | — |
| npm window ends | 2026-09-26Synced from sourceCurrent2h ago | — |
| Open issues | 477Synced from sourceCurrent2h ago | 111Synced from sourceCurrent2h ago |
| PyPI downloads, monthly | — | 27671654Synced from sourceStale1mo ago· past SLA |
| PyPI downloads, weekly | — | 13080962Synced from sourceStale1mo ago· past SLA |
| PyPI package | — | instructorSynced from sourceCurrent2h ago |
| PyPI released | — | 2026-09-09T02:25:54.888746ZSynced from sourceCurrent2h ago |
| Requires Python | — | <4.0,>=3.9Synced from sourceCurrent2h ago |
| PyPI version | — | 1.17.0Synced from sourceCurrent2h ago |
| Repository | https://github.com/mastra-ai/mastraSynced from sourceCurrent2h ago | https://github.com/567-labs/instructorSynced from sourceCurrent2h ago |
Sources: GitHub REST API, npm registry downloads, PyPI registry metadata, pypistats.org downloads. Most recent observation 2h ago. Where a row is marked, ▲ is the highest of the values shown and ▼ the lowest — arithmetic on the figures above, not a ranking or a recommendation. Rows where neither extreme is meaningful are left unmarked rather than given a direction they do not have.
Change the comparison
Remove one, or open the directory to pick a different set. Up to 3 at a time.