Compare frameworks
Guardrails vs Pydantic AI vs LlamaIndex
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 | LlamaIndex |
|---|---|---|---|
| Stars | 7,443Synced from sourceCurrent4h ago | 20,133Synced from sourceCurrent4h ago | 52,306 (highest of the compared values)Synced from sourceCurrent4h ago |
| downloads | — | 3,076,771 (highest of the compared values)Synced from sourceStale1mo ago· past SLA | 83,631Synced from sourceCurrent4h ago |
| Last commit | 2026-09-22Synced from sourceCurrent4h ago | 2026-09-24Synced from sourceCurrent4h ago | 2026-09-24Synced from sourceCurrent4h ago |
| Language | pythonSeeded, unreviewedwritten 1mo ago | pythonSeeded, unreviewedwritten 1mo ago | pythonSeeded, unreviewedwritten 1mo ago |
| Licence | Apache-2.0Synced from sourceCurrent4h ago | MITSynced from sourceCurrent4h ago | MITSynced from sourceCurrent4h ago |
| Archived | noSynced from sourceCurrent4h ago | noSynced from sourceCurrent4h ago | noSynced from sourceCurrent4h ago |
| Category | validationSeeded, unreviewedwritten 1mo ago | structured-outputSeeded, unreviewedwritten 1mo ago | ragSeeded, unreviewedwritten 1mo ago |
| Contributors | 79Synced from sourceCurrent4h ago | 589Synced from sourceCurrent4h ago | 1999Synced from sourceCurrent4h ago |
| Forks | 708Synced from sourceCurrent4h ago | 2768Synced from sourceCurrent4h ago | 8203Synced from sourceCurrent4h ago |
| Maintainer | Guardrails AISeeded, unreviewedwritten 1mo ago | PydanticSeeded, unreviewedwritten 1mo ago | LlamaIndexSeeded, unreviewedwritten 1mo ago |
| npm downloads, monthly | — | — | 429018Synced from sourceCurrent4h ago |
| npm downloads, weekly | — | — | 83631Synced from sourceCurrent4h ago |
| npm package | — | — | llamaindexSynced from sourceCurrent4h ago |
| npm window ends | — | — | 2026-09-21Synced from sourceCurrent4h ago |
| Open issues | 80Synced from sourceCurrent4h ago | 965Synced from sourceCurrent4h ago | 849Synced from sourceCurrent4h ago |
| PyPI downloads, monthly | — | 13478631Synced from sourceStale1mo ago· past SLA | — |
| PyPI downloads, weekly | — | 3076771Synced from sourceStale1mo ago· past SLA | — |
| PyPI package | guardrails-aiSynced from sourceCurrent4h ago | pydantic-aiSynced from sourceCurrent4h ago | llama-indexSynced from sourceCurrent4h ago |
| PyPI released | 2026-08-14T14:22:27.750056ZSynced from sourceCurrent4h ago | 2026-09-24T03:23:01.147978ZSynced from sourceCurrent4h ago | 2026-09-21T16:22:20.056831ZSynced from sourceCurrent4h ago |
| Requires Python | <3.14,>=3.10Synced from sourceCurrent4h ago | >=3.10Synced from sourceCurrent4h ago | <4.0,>=3.10Synced from sourceCurrent4h ago |
| PyPI version | 0.11.0Synced from sourceCurrent4h ago | 2.49.0Synced from sourceCurrent4h ago | 0.14.25Synced from sourceCurrent4h ago |
| Repository | https://github.com/guardrails-ai/guardrailsSynced from sourceCurrent4h ago | https://github.com/pydantic/pydantic-aiSynced from sourceCurrent4h ago | https://github.com/run-llama/llama_indexSynced from sourceCurrent4h ago |
Sources: GitHub REST API, npm registry downloads, PyPI registry metadata, pypistats.org downloads. Most recent observation 4h 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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