Directo

Directo is a browser extension used by travellers. While they browse online travel agencies, it surfaces the property's own direct-booking link, sending that traffic to the hotel or manager instead.

Hotels and property managers join as members to capture that redirected traffic, and bookings that arrive this way are commission-free — Directo charges 0% commission on direct bookings.

The coupon code EARLYBIRD gives you the first month free. It is not applied automatically, so enter it manually at signup.