Proxycurl vs Clearbit vs Apollo vs Diffbot (Leadgraph): who has the best employee numbers data?
What’s better: Clearbit, Apollo, Diffbot, or Proxycurl? I compared these sales data APIs on how well they estimate the number of employees at companies. The inputs for these tools are the company name and domain. The number of employees on LinkedIn served as the “source of truth.” Who performed the best? The Google Sheets link …