Compare frameworks
CrewAI vs smolagents 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 | smolagents | Letta |
|---|---|---|---|
| Stars | 58,958 (highest of the compared values)Synced from sourceCurrent3h ago | 29,463Synced from sourceCurrent3h ago | 24,864Synced from sourceCurrent3h ago |
| downloads | — | 132,630Synced from sourceStale1mo ago· past SLA | — |
| Last commit | 2026-09-23Synced from sourceCurrent3h ago | 2026-09-23Synced from sourceCurrent3h ago | 2026-09-10Synced from sourceCurrent3h ago |
| Language | pythonSeeded, unreviewedwritten 1mo ago | pythonSeeded, unreviewedwritten 1mo ago | pythonSeeded, unreviewedwritten 1mo ago |
| Licence | MITSynced from sourceCurrent3h ago | Apache-2.0Synced from sourceCurrent3h ago | Apache-2.0Synced from sourceCurrent3h ago |
| Archived | noSynced from sourceCurrent3h ago | noSynced from sourceCurrent3h ago | noSynced from sourceCurrent3h ago |
| Category | multi-agentSeeded, unreviewedwritten 1mo ago | multi-agentSeeded, unreviewedwritten 1mo ago | memorySeeded, unreviewedwritten 1mo ago |
| Contributors | 340Synced from sourceCurrent3h ago | 208Synced from sourceCurrent3h ago | 155Synced from sourceCurrent3h ago |
| Forks | 8560Synced from sourceCurrent3h ago | 2991Synced from sourceCurrent3h ago | 2628Synced from sourceCurrent3h ago |
| Maintainer | CrewAISeeded, unreviewedwritten 1mo ago | Hugging FaceSeeded, unreviewedwritten 1mo ago | LettaSeeded, unreviewedwritten 1mo ago |
| Open issues | 463Synced from sourceCurrent3h ago | 827Synced from sourceCurrent3h ago | 0Synced from sourceCurrent3h ago |
| PyPI downloads, monthly | — | 614573Synced from sourceStale1mo ago· past SLA | — |
| PyPI downloads, weekly | — | 132630Synced from sourceStale1mo ago· past SLA | — |
| PyPI package | crewaiSynced from sourceCurrent3h ago | smolagentsSynced from sourceCurrent3h ago | lettaSynced from sourceCurrent3h ago |
| PyPI released | 2026-09-16T22:10:41.471882ZSynced from sourceCurrent3h ago | 2026-05-29T05:08:43.280962ZSynced from sourceCurrent3h ago | 2026-09-23T23:59:05.225455ZSynced from sourceCurrent3h ago |
| Requires Python | <3.14,>=3.10Synced from sourceCurrent3h ago | >=3.10Synced from sourceCurrent3h ago | >=3.9Synced from sourceCurrent3h ago |
| PyPI version | 1.15.22Synced from sourceCurrent3h ago | 1.26.0Synced from sourceCurrent3h ago | 0.33.0Synced from sourceCurrent3h ago |
| Repository | https://github.com/crewAIInc/crewAISynced from sourceCurrent3h ago | https://github.com/huggingface/smolagentsSynced from sourceCurrent3h ago | https://github.com/letta-ai/lettaSynced from sourceCurrent3h ago |
Sources: GitHub REST API, npm registry downloads, PyPI registry metadata, pypistats.org downloads. Most recent observation 3h 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.
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