Compare frameworks
Letta vs AutoGen vs Pydantic AI
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 | AutoGen | Pydantic AI |
|---|---|---|---|
| Stars | 24,923Synced from sourceCurrent4h ago | 61,194 (highest of the compared values)Synced from sourceCurrent4h ago | 20,220Synced from sourceCurrent4h ago |
| downloads | — | 47,487Synced from sourceStale10d ago | 3,076,771 (highest of the compared values)Synced from sourceStale1mo ago· past SLA |
| Last commit | 2026-09-10Synced from sourceCurrent4h ago | 2026-04-15Synced from sourceCurrent4h ago | 2026-09-28Synced from sourceCurrent4h ago |
| Language | pythonSeeded, unreviewedwritten 1mo ago | pythonSeeded, unreviewedwritten 1mo ago | pythonSeeded, unreviewedwritten 1mo ago |
| Licence | Apache-2.0Synced from sourceCurrent4h ago | CC-BY-4.0Synced from sourceCurrent4h ago | MITSynced from sourceCurrent4h ago |
| Archived | noSynced from sourceCurrent4h ago | noSynced from sourceCurrent4h ago | noSynced from sourceCurrent4h ago |
| Category | memorySeeded, unreviewedwritten 1mo ago | multi-agentSeeded, unreviewedwritten 1mo ago | structured-outputSeeded, unreviewedwritten 1mo ago |
| Contributors | 155Synced from sourceCurrent4h ago | 534Synced from sourceCurrent4h ago | 609Synced from sourceCurrent4h ago |
| Forks | 2631Synced from sourceCurrent4h ago | 9256Synced from sourceCurrent4h ago | 2796Synced from sourceCurrent4h ago |
| Maintainer | LettaSeeded, unreviewedwritten 1mo ago | MicrosoftSeeded, unreviewedwritten 1mo ago | PydanticSeeded, unreviewedwritten 1mo ago |
| Open issues | 0Synced from sourceCurrent4h ago | 1105Synced from sourceCurrent4h ago | 1013Synced from sourceCurrent4h ago |
| PyPI downloads, monthly | — | 263297Synced from sourceStale10d ago | 13478631Synced from sourceStale1mo ago· past SLA |
| PyPI downloads, weekly | — | 47487Synced from sourceStale10d ago | 3076771Synced from sourceStale1mo ago· past SLA |
| PyPI package | lettaSynced from sourceCurrent4h ago | pyautogenSynced from sourceCurrent4h ago | pydantic-aiSynced from sourceCurrent4h ago |
| PyPI released | 2026-09-28T04:32:31.896015ZSynced from sourceCurrent4h ago | 2025-07-15T00:37:26.170442ZSynced from sourceCurrent4h ago | 2026-09-25T23:32:17.554286ZSynced from sourceCurrent4h ago |
| Requires Python | >=3.9Synced from sourceCurrent4h ago | >=3.10Synced from sourceCurrent4h ago | >=3.10Synced from sourceCurrent4h ago |
| PyPI version | 0.33.5Synced from sourceCurrent4h ago | 0.10.0Synced from sourceCurrent4h ago | 2.51.0Synced from sourceCurrent4h ago |
| Repository | https://github.com/letta-ai/lettaSynced from sourceCurrent4h ago | https://github.com/microsoft/autogenSynced from sourceCurrent4h ago | https://github.com/pydantic/pydantic-aiSynced from sourceCurrent4h ago |
Sources: GitHub REST API, npm registry downloads, PyPI registry metadata, pypistats.org downloads. Most recent observation 4h 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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