Alex McCaw mentioned in Clearbit&#x27;s launch post earlier this year that Svbtle is using their API to auto populate their sign up form:
<a href="http:&#x2F;&#x2F;blog.alexmaccaw.com&#x2F;clearbit" rel="nofollow">http:&#x2F;&#x2F;blog.alexmaccaw.com&#x2F;clearbit</a><p>My guess is that Magic is using Clearbit&#x27;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.