Compare frameworks
Letta 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 | Letta | Instructor |
|---|---|---|
| Stars | 24,864 (highest of the compared values)Synced from sourceCurrentjust now | 13,939Synced from sourceCurrentjust now |
| downloads | — | 13,080,962Synced from sourceStale1mo ago· past SLA |
| Last commit | 2026-09-10Synced from sourceCurrentjust now | 2026-09-22Synced from sourceCurrentjust now |
| Language | pythonSeeded, unreviewedwritten 1mo ago | pythonSeeded, unreviewedwritten 1mo ago |
| Licence | Apache-2.0Synced from sourceCurrentjust now | MITSynced from sourceCurrentjust now |
| Archived | noSynced from sourceCurrentjust now | noSynced from sourceCurrentjust now |
| Category | memorySeeded, unreviewedwritten 1mo ago | structured-outputSeeded, unreviewedwritten 1mo ago |
| Contributors | 155Synced from sourceCurrentjust now | 267Synced from sourceCurrentjust now |
| Forks | 2628Synced from sourceCurrentjust now | 1262Synced from sourceCurrentjust now |
| Maintainer | LettaSeeded, unreviewedwritten 1mo ago | 567 LabsSeeded, unreviewedwritten 1mo ago |
| Open issues | 0Synced 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 | lettaSynced from sourceCurrentjust now | instructorSynced from sourceCurrentjust now |
| PyPI released | 2026-09-23T23:59:05.225455ZSynced from sourceCurrentjust now | 2026-09-09T02:25:54.888746ZSynced from sourceCurrentjust now |
| Requires Python | >=3.9Synced from sourceCurrentjust now | <4.0,>=3.9Synced from sourceCurrentjust now |
| PyPI version | 0.33.0Synced from sourceCurrentjust now | 1.17.0Synced from sourceCurrentjust now |
| Repository | https://github.com/letta-ai/lettaSynced 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.
Change the comparison
Remove one, or open the directory to pick a different set. Up to 3 at a time.