There is a fairly large number of REST APIs offering real-time and historical currency conversion out there. From data coverage, update frequency, exchange rate sources, pricing, UI and features - we have taken every detail into account, and found that below the surface there is a considerable ratio of difference between each provider.
Now, which API performs best for a Startup? - which one is the most reliable and consistent? - which one justifies its price the most? A brief overview of our results are compactly listed in the table below! (jump to Full Comparison)