How do you estimate market size for a new cloud security product?

For TAM, start with Gartner or IDC reports on the cloud security market (they usually break it down by segment). Then narrow to SAM by filtering for mid-market companies (100-1000 employees) using firmographic data from sources like ZoomInfo or LinkedIn — cross-reference with the % that use multi-cloud environments. A quick gut-check: Gartner pegged the broader cloud security market at ~$40B+ for 2024, so your SAM slice will depend heavily on how tightly you define the use case.