Compare frameworks
Letta vs smolagents vs Mastra
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 | smolagents | Mastra |
|---|---|---|---|
| Stars | 25,382Synced from sourceCurrent3h ago | 30,260 (highest of the compared values)Synced from sourceCurrent3h ago | 29,400Synced from sourceCurrent3h ago |
| downloads | — | 132,630Synced from sourceStale2mo ago· past SLA | 3,150,478 (highest of the compared values)Synced from sourceCurrent3h ago |
| Last commit | 2026-10-18Synced from sourceCurrent3h ago | 2026-11-03Synced from sourceCurrent3h ago | 2026-11-08Synced from sourceCurrent3h ago |
| Language | pythonSeeded, unreviewedwritten 2mo ago | pythonSeeded, unreviewedwritten 2mo ago | typescriptSeeded, unreviewedwritten 2mo ago |
| Licence | 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 | memorySeeded, unreviewedwritten 2mo ago | multi-agentSeeded, unreviewedwritten 2mo ago | orchestrationSeeded, unreviewedwritten 2mo ago |
| Contributors | 155Synced from sourceCurrent3h ago | 208Synced from sourceCurrent3h ago | 701Synced from sourceCurrent3h ago |
| Forks | 2667Synced from sourceCurrent3h ago | 3200Synced from sourceCurrent3h ago | 3085Synced from sourceCurrent3h ago |
| Maintainer | LettaSeeded, unreviewedwritten 2mo ago | Hugging FaceSeeded, unreviewedwritten 2mo ago | MastraSeeded, unreviewedwritten 2mo ago |
| npm downloads, monthly | — | — | 10391822Synced from sourceCurrent3h ago |
| npm downloads, weekly | — | — | 3150478Synced from sourceCurrent3h ago |
| npm package | — | — | @mastra/coreSynced from sourceCurrent3h ago |
| npm window ends | — | — | 2026-11-06Synced from sourceCurrent3h ago |
| Open issues | 0Synced from sourceCurrent3h ago | 1048Synced from sourceCurrent3h ago | 820Synced from sourceCurrent3h ago |
| PyPI downloads, monthly | — | 614573Synced from sourceStale2mo ago· past SLA | — |
| PyPI downloads, weekly | — | 132630Synced from sourceStale2mo ago· past SLA | — |
| PyPI package | lettaSynced from sourceCurrent3h ago | smolagentsSynced from sourceCurrent3h ago | — |
| PyPI released | 2026-10-12T20:47:35.858621ZSynced from sourceCurrent3h ago | 2026-05-29T05:08:43.280962ZSynced from sourceCurrent3h ago | — |
| Requires Python | >=3.9Synced from sourceCurrent3h ago | >=3.10Synced from sourceCurrent3h ago | — |
| PyPI version | 0.34.12Synced from sourceCurrent3h ago | 1.26.0Synced from sourceCurrent3h ago | — |
| Repository | https://github.com/letta-ai/lettaSynced from sourceCurrent3h ago | https://github.com/huggingface/smolagentsSynced from sourceCurrent3h ago | https://github.com/mastra-ai/mastraSynced 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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