Fathom is a global water and climate risk intelligence firm that specializes in flood risk mapping and modeling. Founded in 2013 from academic research at the University of Bristol, Fathom provides scientifically rigorous data to help businesses and communities manage and mitigate water risks. In December 2023, Fathom joined Swiss Re, enhancing its ability to deliver advanced solutions for water-related risk resilience.

The company offers a range of services, including high-quality flood hazard mapping, the Global River Topology (GRIT) dataset, and the FathomDEM Global Terrain Map, which supports accurate flood modeling. Fathom also provides risk scores and geospatial data tailored for various regions, along with catastrophe models and flood hazard maps developed by a team of scientists. Their research contributes to the understanding of climate change impacts on water risk, supporting clients across multiple sectors, including government agencies, insurance companies, and humanitarian organizations.