Compare frameworks
Letta vs Semantic Kernel
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 | Semantic Kernel |
|---|---|---|
| Stars | 24,864Synced from sourceCurrentjust now | 28,593 (highest of the compared values)Synced from sourceCurrentjust now |
| Last commit | 2026-09-10Synced from sourceCurrentjust now | 2026-09-19Synced from sourceCurrentjust now |
| Language | pythonSeeded, unreviewedwritten 1mo ago | csharpSeeded, unreviewedwritten 1mo ago |
| Licence | Apache-2.0Synced from sourceCurrentjust now | MITSynced from sourceCurrentjust now |
| Archived | noSynced from sourceCurrentjust now | noSynced from sourceCurrentjust now |
| Category | memorySeeded, unreviewedwritten 1mo ago | orchestrationSeeded, unreviewedwritten 1mo ago |
| Contributors | 155Synced from sourceCurrentjust now | 416Synced from sourceCurrentjust now |
| Forks | 2628Synced from sourceCurrentjust now | 4787Synced from sourceCurrentjust now |
| Maintainer | LettaSeeded, unreviewedwritten 1mo ago | MicrosoftSeeded, unreviewedwritten 1mo ago |
| Open issues | 0Synced from sourceCurrentjust now | 320Synced from sourceCurrentjust now |
| PyPI package | lettaSynced from sourceCurrentjust now | semantic-kernelSynced from sourceCurrentjust now |
| PyPI released | 2026-09-23T23:59:05.225455ZSynced from sourceCurrentjust now | 2026-08-06T09:56:42.518861ZSynced from sourceCurrentjust now |
| Requires Python | >=3.9Synced from sourceCurrentjust now | >=3.10Synced from sourceCurrentjust now |
| PyPI version | 0.33.0Synced from sourceCurrentjust now | 1.44.1Synced from sourceCurrentjust now |
| Repository | https://github.com/letta-ai/lettaSynced from sourceCurrentjust now | https://github.com/microsoft/semantic-kernelSynced 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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