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 | 7,587Synced from sourceCurrent3h ago | 28,745 (highest of the compared values)Synced from sourceCurrent3h ago | 26,943Synced from sourceCurrent3h ago |
| Last commit | 2026-11-05Synced from sourceCurrent3h ago | 2026-11-07Synced from sourceCurrent3h ago | 2026-11-07Synced from sourceCurrent3h ago |
| Language | pythonSeeded, unreviewedwritten 2mo ago | csharpSeeded, unreviewedwritten 2mo ago | pythonSeeded, unreviewedwritten 2mo 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 2mo ago | orchestrationSeeded, unreviewedwritten 2mo ago | ragSeeded, unreviewedwritten 2mo ago |
| Contributors | 79Synced from sourceCurrent3h ago | 460Synced from sourceCurrent3h ago | 556Synced from sourceCurrent3h ago |
| Forks | 737Synced from sourceCurrent3h ago | 4856Synced from sourceCurrent3h ago | 3406Synced from sourceCurrent3h ago |
| Maintainer | Guardrails AISeeded, unreviewedwritten 2mo ago | MicrosoftSeeded, unreviewedwritten 2mo ago | deepsetSeeded, unreviewedwritten 2mo ago |
| Open issues | 63Synced from sourceCurrent3h ago | 315Synced from sourceCurrent3h ago | 173Synced 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 | 2026-11-05T10:58:35.730388ZSynced from sourceCurrent3h ago | 2026-10-21T19:10:50.167432ZSynced from sourceCurrent3h ago |
| Requires Python | <3.14,>=3.10Synced from sourceCurrent3h ago | >=3.11Synced from sourceCurrent3h ago | >=3.11Synced from sourceCurrent3h ago |
| PyPI version | 0.11.0Synced from sourceCurrent3h ago | 1.47.0Synced from sourceCurrent3h ago | 3.4.1Synced 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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