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Vercel AI SDK vs PydanticAI

An independent, evidence-weighted trust comparison of two agent frameworks — ranked on verifiable signals, not popularity.

Vercel AI SDK ranks higher with an HVTrust score of 91.9 vs 91.8/100 . HVTrust reflects supply-chain safety, transparency, maintenance, and adoption — weighted by how much verifiable evidence exists.
SignalVercel AI SDKPydanticAI
HVTrust score91.991.8
Evidence gradeAA
Registry stateListedListed
Safety / Integrity (25)20.220.5
Identity / Provenance (18)18.018.0
Transparency (17)13.813.9
Maintenance (20)19.919.9
Adoption (20)20.019.5
GitHub stars24.6k17.5k
Weekly downloads13,018,4829,665,697
Last push2026-06-022026-06-02
LanguageTypeScriptPython
OSSF Scorecard6.26.4
Review flags——
Recent change2026-06-01: HVTrust up 3.1pts (88.9 → 92.0)2026-06-01: HVTrust up 3.8pts (88.1 → 91.9)
Full Vercel AI SDK report → Full PydanticAI report → All Agent Frameworks →