First Street Technology Inc.

First Street

First Street provides asset-level physical climate risk for the United States, with peer-reviewed, publicly documented models for flood, wildfire, wind, heat, drought and air quality built down to individual property level. Outputs span hazard probability and severity, estimated structural damage, repair cost and downtime, plus insurance and macroeconomic impacts under multiple SSP scenarios over a 30-year horizon, aggregated to portfolios. Its data underpin the consumer-facing risk scores on major US real-estate listing portals. Distinctive for the granularity of its US property modelling and for per-peril methodology papers that are open to external review.

Vendor methodology

Transparency Score

Beta

Public transparency, not model quality iThe Transparency Score (0–3) estimates public methodological transparency: the degree to which the vendor's analytical approach to modeling climate and nature risk can be assessed from publicly available sources. It is explicitly not a measure of vendor quality or accuracy.

3

Transparency leader: risk methodology is openly documented, peer-reviewed, or open-source.

Transparency leader: public per-peril methodology pages, a documentation portal and peer-reviewed research let a reviewer reconstruct the approach; only the deepest internals sit in the paid product.

For further information, see the section 'Transparency Score methodology' in the Readme.

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