Waterfall is a San Francisco software company founded in 2021 that provides B2B contact-data enrichment through "waterfall" enrichment. It aggregates more than 30 data vendors behind a single interface so teams can maximize coverage of contact details, email addresses, and mobile numbers without signing separate contracts with each provider. The small, roughly 7-person company sells access to combined vendor coverage on flexible terms rather than long-term commitments.
📝Waterfall enrichment — querying multiple data sources in sequence and taking the first valid result — became a standard technique in modern go-to-market and GTM Engineering workflows, where data coverage and accuracy directly determine outbound performance. Waterfall packages that pattern as a product, competing with both individual data vendors and the enrichment features built into platforms like Clay, and positioning itself as the aggregation layer that removes the need to manage many vendor relationships.