Compare frameworks
CrewAI vs Letta
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 | CrewAI | Letta |
|---|---|---|
| Stars | 58,958 (highest of the compared values)Synced from sourceCurrentjust now | 24,864Synced from sourceCurrentjust now |
| Last commit | 2026-09-23Synced from sourceCurrentjust now | 2026-09-10Synced from sourceCurrentjust now |
| Language | pythonSeeded, unreviewedwritten 1mo ago | pythonSeeded, unreviewedwritten 1mo ago |
| Licence | MITSynced from sourceCurrentjust now | Apache-2.0Synced from sourceCurrentjust now |
| Archived | noSynced from sourceCurrentjust now | noSynced from sourceCurrentjust now |
| Category | multi-agentSeeded, unreviewedwritten 1mo ago | memorySeeded, unreviewedwritten 1mo ago |
| Contributors | 340Synced from sourceCurrentjust now | 155Synced from sourceCurrentjust now |
| Forks | 8560Synced from sourceCurrentjust now | 2628Synced from sourceCurrentjust now |
| Maintainer | CrewAISeeded, unreviewedwritten 1mo ago | LettaSeeded, unreviewedwritten 1mo ago |
| Open issues | 463Synced from sourceCurrentjust now | 0Synced from sourceCurrentjust now |
| PyPI package | crewaiSynced from sourceCurrentjust now | lettaSynced from sourceCurrentjust now |
| PyPI released | 2026-09-16T22:10:41.471882ZSynced from sourceCurrentjust now | 2026-09-23T23:59:05.225455ZSynced from sourceCurrentjust now |
| Requires Python | <3.14,>=3.10Synced from sourceCurrentjust now | >=3.9Synced from sourceCurrentjust now |
| PyPI version | 1.15.22Synced from sourceCurrentjust now | 0.33.0Synced from sourceCurrentjust now |
| Repository | https://github.com/crewAIInc/crewAISynced from sourceCurrentjust now | https://github.com/letta-ai/lettaSynced 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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