Compare frameworks
Guardrails vs Semantic Kernel vs Haystack
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 | Semantic Kernel | Haystack |
|---|---|---|---|
| Stars | 7,443Synced from sourceCurrent3h ago | 28,593 (highest of the compared values)Synced from sourceCurrent3h ago | 26,584Synced from sourceCurrent3h ago |
| Last commit | 2026-09-22Synced from sourceCurrent3h ago | 2026-09-19Synced from sourceCurrent3h ago | 2026-09-23Synced from sourceCurrent3h ago |
| Language | pythonSeeded, unreviewedwritten 1mo ago | csharpSeeded, unreviewedwritten 1mo ago | pythonSeeded, unreviewedwritten 1mo ago |
| Licence | Apache-2.0Synced from sourceCurrent3h ago | MITSynced from sourceCurrent3h ago | Apache-2.0Synced from sourceCurrent3h ago |
| Archived | noSynced from sourceCurrent3h ago | noSynced from sourceCurrent3h ago | noSynced from sourceCurrent3h ago |
| Category | validationSeeded, unreviewedwritten 1mo ago | orchestrationSeeded, unreviewedwritten 1mo ago | ragSeeded, unreviewedwritten 1mo ago |
| Contributors | 79Synced from sourceCurrent3h ago | 416Synced from sourceCurrent3h ago | 475Synced from sourceCurrent3h ago |
| Forks | 708Synced from sourceCurrent3h ago | 4787Synced from sourceCurrent3h ago | 3176Synced from sourceCurrent3h ago |
| Maintainer | Guardrails AISeeded, unreviewedwritten 1mo ago | MicrosoftSeeded, unreviewedwritten 1mo ago | deepsetSeeded, unreviewedwritten 1mo ago |
| Open issues | 80Synced from sourceCurrent3h ago | 320Synced from sourceCurrent3h ago | 168Synced from sourceCurrent3h ago |
| PyPI package | guardrails-aiSynced from sourceCurrent3h ago | semantic-kernelSynced from sourceCurrent3h ago | haystack-aiSynced from sourceCurrent3h ago |
| PyPI released | 2026-08-14T14:22:27.750056ZSynced from sourceCurrent3h ago | 2026-08-06T09:56:42.518861ZSynced from sourceCurrent3h ago | 2026-09-03T09:27:43.312258ZSynced from sourceCurrent3h ago |
| Requires Python | <3.14,>=3.10Synced from sourceCurrent3h ago | >=3.10Synced from sourceCurrent3h ago | >=3.10Synced from sourceCurrent3h ago |
| PyPI version | 0.11.0Synced from sourceCurrent3h ago | 1.44.1Synced from sourceCurrent3h ago | 3.1.1Synced from sourceCurrent3h ago |
| Repository | https://github.com/guardrails-ai/guardrailsSynced from sourceCurrent3h ago | https://github.com/microsoft/semantic-kernelSynced from sourceCurrent3h ago | https://github.com/deepset-ai/haystackSynced 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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