Compare frameworks
smolagents vs Haystack 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 | smolagents | Haystack | Letta |
|---|---|---|---|
| Stars | 29,463 (highest of the compared values)Synced from sourceCurrent2h ago | 26,584Synced from sourceCurrent2h ago | 24,864Synced from sourceCurrent2h ago |
| downloads | 132,630Synced from sourceStale1mo ago· past SLA | — | — |
| Last commit | 2026-09-23Synced from sourceCurrent2h ago | 2026-09-23Synced from sourceCurrent2h ago | 2026-09-10Synced from sourceCurrent2h ago |
| Language | pythonSeeded, unreviewedwritten 1mo ago | pythonSeeded, unreviewedwritten 1mo ago | pythonSeeded, unreviewedwritten 1mo ago |
| Licence | Apache-2.0Synced from sourceCurrent2h ago | Apache-2.0Synced from sourceCurrent2h ago | Apache-2.0Synced from sourceCurrent2h ago |
| Archived | noSynced from sourceCurrent2h ago | noSynced from sourceCurrent2h ago | noSynced from sourceCurrent2h ago |
| Category | multi-agentSeeded, unreviewedwritten 1mo ago | ragSeeded, unreviewedwritten 1mo ago | memorySeeded, unreviewedwritten 1mo ago |
| Contributors | 208Synced from sourceCurrent2h ago | 475Synced from sourceCurrent2h ago | 155Synced from sourceCurrent2h ago |
| Forks | 2991Synced from sourceCurrent2h ago | 3176Synced from sourceCurrent2h ago | 2628Synced from sourceCurrent2h ago |
| Maintainer | Hugging FaceSeeded, unreviewedwritten 1mo ago | deepsetSeeded, unreviewedwritten 1mo ago | LettaSeeded, unreviewedwritten 1mo ago |
| Open issues | 827Synced from sourceCurrent2h ago | 168Synced from sourceCurrent2h ago | 0Synced from sourceCurrent2h ago |
| PyPI downloads, monthly | 614573Synced from sourceStale1mo ago· past SLA | — | — |
| PyPI downloads, weekly | 132630Synced from sourceStale1mo ago· past SLA | — | — |
| PyPI package | smolagentsSynced from sourceCurrent2h ago | haystack-aiSynced from sourceCurrent2h ago | lettaSynced from sourceCurrent2h ago |
| PyPI released | 2026-05-29T05:08:43.280962ZSynced from sourceCurrent2h ago | 2026-09-03T09:27:43.312258ZSynced from sourceCurrent2h ago | 2026-09-23T23:59:05.225455ZSynced from sourceCurrent2h ago |
| Requires Python | >=3.10Synced from sourceCurrent2h ago | >=3.10Synced from sourceCurrent2h ago | >=3.9Synced from sourceCurrent2h ago |
| PyPI version | 1.26.0Synced from sourceCurrent2h ago | 3.1.1Synced from sourceCurrent2h ago | 0.33.0Synced from sourceCurrent2h ago |
| Repository | https://github.com/huggingface/smolagentsSynced from sourceCurrent2h ago | https://github.com/deepset-ai/haystackSynced from sourceCurrent2h ago | https://github.com/letta-ai/lettaSynced from sourceCurrent2h ago |
Sources: GitHub REST API, npm registry downloads, PyPI registry metadata, pypistats.org downloads. Most recent observation 2h 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.
Change the comparison
Remove one, or open the directory to pick a different set. Up to 3 at a time.