If you are looking for a cheaper, faster, or more specialized alternative, here are the top contenders in 2024. Best for: Historical DNS and reverse WHOIS lookups.

However, the API has its drawbacks: can escalate quickly for startups or researchers, the data volume can be overwhelming for simple tasks, and some users report that support for "catch-all" domains or historical reverse lookups can be slow.

For years, WhoisXML API has been a dominant force in the cybersecurity and domain intelligence space. Their massive database of WHOIS records, DNS history, and IP netblocks is invaluable for threat intelligence, brand protection, and domain investing.