Alex McCaw mentioned in Clearbit's launch post earlier this year that Svbtle is using their API to auto populate their sign up form: http://blog.alexmaccaw.com/

Alex McCaw mentioned in Clearbit's launch post earlier this year that Svbtle is using their API to auto populate their sign up form: http://blog.alexmaccaw.com/clearbit http://blog.alexmaccaw.com/clearbit My guess is that Magic is using Clearbit's API as a base, then layering on their own scraped data sources as well, which is a pretty common strategy for these types of APIs.