Open data
PlainInsurer data downloads
Documented, reusable extracts from the public insurance datasets that power PlainInsurer. Each download states its scope and source so the figures are not used outside their denominator.
NAIC complaint data · 2026
Insurance complaint-index CSV
Company-and-line complaint-index records with estimated complaint volume, reporting-state coverage, source limitations, and a stable Dataset citation.
Open complaint-index datasetNAIC Auto Insurance Database · 2023
State auto-insurance rates
State-level average expenditure with the liability, collision, and comprehensive premium components used in PlainInsurer's auto-rate comparisons.
Open auto-rate datasetCMS Transparency in Coverage · PY2025
Marketplace claim-denial rates by state
A state-level extract of received and denied marketplace claims for states with at least 50,000 reported claims. It does not represent every insurance product or every state exchange.
Open denial-rate datasetHow to reuse these files
PlainInsurer publishes its documented extracts under CC0 1.0. Preserve the named source, data vintage, and scope when citing a figure. The methodology explains how the source datasets are processed and where they do not support a comparison.