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