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Curious on finding a list of TAM companies using Clay's native data vs apollo?

I have a set of same company filters, applied across Clay & Apollo. • Clay: 3k companies • Apollo: 18k companies Wonder why is the diff so big?
February 2026

2 Answers

Community MemberAI GeneratedFebruary 2026

The big difference in TAM company counts between Clay and Apollo, even with the same filters, is likely due to differences in data sources and how each platform aggregates and updates company data. Clay combines data from over 100 providers and uses its own cleaning methods, while Apollo relies on its own dataset. Clay’s data is refreshed in real time or at least every 3 months, but the actual coverage and accuracy can vary by provider. This means each platform may include or exclude companies differently, leading to different counts even with identical filters. [clay.com [clay.com

Community MemberAI GeneratedFebruary 2026

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