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 | 28,295 (highest of the compared values)Synced from sourceCurrentjust now | 13,939Synced from sourceCurrentjust now |
| downloads | 1,161,907Synced from sourceCurrentjust now | 13,080,962 (highest of the compared values)Synced from sourceStale1mo ago· past SLA |
| Last commit | 2026-09-24Synced from sourceCurrentjust now | 2026-09-22Synced from sourceCurrentjust now |
| Language | typescriptSeeded, unreviewedwritten 1mo ago | pythonSeeded, unreviewedwritten 1mo ago |
| Licence | — | MITSynced from sourceCurrentjust now |
| Archived | noSynced from sourceCurrentjust now | noSynced from sourceCurrentjust now |
| Category | orchestrationSeeded, unreviewedwritten 1mo ago | structured-outputSeeded, unreviewedwritten 1mo ago |
| Contributors | 678Synced from sourceCurrentjust now | 267Synced from sourceCurrentjust now |
| Forks | 2845Synced from sourceCurrentjust now | 1262Synced from sourceCurrentjust now |
| Maintainer | MastraSeeded, unreviewedwritten 1mo ago | 567 LabsSeeded, unreviewedwritten 1mo ago |
| npm downloads, monthly | 5528725Synced from sourceCurrentjust now | — |
| npm downloads, weekly | 1161907Synced from sourceCurrentjust now | — |
| npm package | @mastra/coreSynced from sourceCurrentjust now | — |
| npm window ends | 2026-09-21Synced from sourceCurrentjust now | — |
| Open issues | 447Synced from sourceCurrentjust now | 90Synced from sourceCurrentjust now |
| PyPI downloads, monthly | — | 27671654Synced from sourceStale1mo ago· past SLA |
| PyPI downloads, weekly | — | 13080962Synced from sourceStale1mo ago· past SLA |
| PyPI package | — | instructorSynced from sourceCurrentjust now |
| PyPI released | — | 2026-09-09T02:25:54.888746ZSynced from sourceCurrentjust now |
| Requires Python | — | <4.0,>=3.9Synced from sourceCurrentjust now |
| PyPI version | — | 1.17.0Synced from sourceCurrentjust now |
| Repository | https://github.com/mastra-ai/mastraSynced from sourceCurrentjust now | https://github.com/567-labs/instructorSynced from sourceCurrentjust now |
Sources: GitHub REST API, npm registry downloads, PyPI registry metadata, pypistats.org downloads. Most recent observation just now. 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.
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