Geocoding API made with developers in mind. There was a huge segment of the market that was completely unserved before Geocodio, since the major mapping providers give you 2,500 free a day -- but to get one more than that, you have to pay tens of thousands of dollars a year. We let developers pay a very small fee per geocode beyond 2,500 requests ($.001 each).
In addition to geocoding, Geocodio also provides reverse lookups.
Geocodio was on the front page of Hacker News for almost 24 hours at launch and had 350+ users within a week of launch.