They provide a lot of information about the addresses you submit. It helps making decisions about customers' list serves and explaining why I made them.

Warm-up domains, contact enrichment, and integration with Apollo.ai.

Very helpful online chat (a real person) and access to one free usage for a list of up to 100 email addreses. Excellent resilts screen and dowen load of its results and very helpful to maintain and improve deliverability and reputation