Compare frameworks
Guardrails vs Pydantic AI vs CrewAI
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 | Pydantic AI | CrewAI |
|---|---|---|---|
| Stars | 7,443Synced from sourceCurrent3h ago | 20,133Synced from sourceCurrent3h ago | 58,958 (highest of the compared values)Synced from sourceCurrent3h ago |
| downloads | — | 3,076,771Synced from sourceStale1mo ago· past SLA | — |
| Last commit | 2026-09-22Synced from sourceCurrent3h ago | 2026-09-24Synced from sourceCurrent3h ago | 2026-09-23Synced from sourceCurrent3h ago |
| Language | pythonSeeded, unreviewedwritten 1mo ago | pythonSeeded, unreviewedwritten 1mo ago | pythonSeeded, unreviewedwritten 1mo ago |
| Licence | Apache-2.0Synced from sourceCurrent3h ago | MITSynced from sourceCurrent3h ago | MITSynced from sourceCurrent3h ago |
| Archived | noSynced from sourceCurrent3h ago | noSynced from sourceCurrent3h ago | noSynced from sourceCurrent3h ago |
| Category | validationSeeded, unreviewedwritten 1mo ago | structured-outputSeeded, unreviewedwritten 1mo ago | multi-agentSeeded, unreviewedwritten 1mo ago |
| Contributors | 79Synced from sourceCurrent3h ago | 589Synced from sourceCurrent3h ago | 340Synced from sourceCurrent3h ago |
| Forks | 708Synced from sourceCurrent3h ago | 2768Synced from sourceCurrent3h ago | 8560Synced from sourceCurrent3h ago |
| Maintainer | Guardrails AISeeded, unreviewedwritten 1mo ago | PydanticSeeded, unreviewedwritten 1mo ago | CrewAISeeded, unreviewedwritten 1mo ago |
| Open issues | 80Synced from sourceCurrent3h ago | 965Synced from sourceCurrent3h ago | 463Synced from sourceCurrent3h ago |
| PyPI downloads, monthly | — | 13478631Synced from sourceStale1mo ago· past SLA | — |
| PyPI downloads, weekly | — | 3076771Synced from sourceStale1mo ago· past SLA | — |
| PyPI package | guardrails-aiSynced from sourceCurrent3h ago | pydantic-aiSynced from sourceCurrent3h ago | crewaiSynced from sourceCurrent3h ago |
| PyPI released | 2026-08-14T14:22:27.750056ZSynced from sourceCurrent3h ago | 2026-09-24T03:23:01.147978ZSynced from sourceCurrent3h ago | 2026-09-16T22:10:41.471882ZSynced from sourceCurrent3h ago |
| Requires Python | <3.14,>=3.10Synced from sourceCurrent3h ago | >=3.10Synced from sourceCurrent3h ago | <3.14,>=3.10Synced from sourceCurrent3h ago |
| PyPI version | 0.11.0Synced from sourceCurrent3h ago | 2.49.0Synced from sourceCurrent3h ago | 1.15.22Synced from sourceCurrent3h ago |
| Repository | https://github.com/guardrails-ai/guardrailsSynced from sourceCurrent3h ago | https://github.com/pydantic/pydantic-aiSynced from sourceCurrent3h ago | https://github.com/crewAIInc/crewAISynced 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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