Compare frameworks
Guardrails 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 | Guardrails | Letta |
|---|---|---|
| Stars | 7,456Synced from sourceCurrent2h ago | 24,923 (highest of the compared values)Synced from sourceCurrent2h ago |
| Last commit | 2026-09-25Synced from sourceCurrent2h ago | 2026-09-10Synced from sourceCurrent2h ago |
| Language | pythonSeeded, unreviewedwritten 1mo ago | pythonSeeded, unreviewedwritten 1mo ago |
| Licence | Apache-2.0Synced from sourceCurrent2h ago | Apache-2.0Synced from sourceCurrent2h ago |
| Archived | noSynced from sourceCurrent2h ago | noSynced from sourceCurrent2h ago |
| Category | validationSeeded, unreviewedwritten 1mo ago | memorySeeded, unreviewedwritten 1mo ago |
| Contributors | 79Synced from sourceCurrent2h ago | 155Synced from sourceCurrent2h ago |
| Forks | 707Synced from sourceCurrent2h ago | 2631Synced from sourceCurrent2h ago |
| Maintainer | Guardrails AISeeded, unreviewedwritten 1mo ago | LettaSeeded, unreviewedwritten 1mo ago |
| Open issues | 79Synced from sourceCurrent2h ago | 0Synced from sourceCurrent2h ago |
| PyPI package | guardrails-aiSynced from sourceCurrent2h ago | lettaSynced from sourceCurrent2h ago |
| PyPI released | 2026-08-14T14:22:27.750056ZSynced from sourceCurrent2h ago | 2026-09-28T04:32:31.896015ZSynced from sourceCurrent2h ago |
| Requires Python | <3.14,>=3.10Synced from sourceCurrent2h ago | >=3.9Synced from sourceCurrent2h ago |
| PyPI version | 0.11.0Synced from sourceCurrent2h ago | 0.33.5Synced from sourceCurrent2h ago |
| Repository | https://github.com/guardrails-ai/guardrailsSynced 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.
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