updated 2026-06-15 12:03 UTC
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Vercel AI SDK vs Haystack

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 92.4 vs 92.3/100 . HVTrust reflects supply-chain safety, transparency, maintenance, and adoption — weighted by how much verifiable evidence exists.
SignalVercel AI SDKHaystack
HVTrust score92.492.3
Evidence gradeAA
Registry stateListedListed
Safety / Integrity (25)20.522.2
Identity / Provenance (18)18.018.0
Transparency (17)13.915.1
Maintenance (20)20.019.3
Adoption (20)20.017.7
GitHub stars24.9k25.5k
Weekly downloads15,137,454204,140
Last push2026-06-152026-06-05
LanguageTypeScriptPython
OSSF Scorecard6.47.8
Review flags——
Recent change2026-05-28: Rank rose 46 spots (#47 → #1)2026-06-05: Rank rose 10 spots (#11 → #1)
Full Vercel AI SDK report → Full Haystack report → All Agent Frameworks →