Ask HN: Do FedEx, UPS, TNT and DHL have an oligopoly in the courier market?

Hey HN community, we've just launched the beta for a comparison tool and database for international courier services (www.goshippo.com). Intention is to make sending (and selling) stuff internationally cheaper and easier. The trick is to include small local courier services in our database because they offer better rates than Fedex but are harder to find. Looking for feedback and beta testers right now. Any thoughts are highly appreciated. Right now Northern Europe and US works as outbound countries. I'm happy to prioritise integrating any other country in exchange for beta testing and feedback!