"Meet the man who's getting his ass kicked by Airbnb in Europe"
Your title is pure link-bait. You offer no specifics AT ALL in your article about how HouseTrip is beating Airbnb. In fact the one potential metric for success that you list for both company is money raised. If that is your success metric, then HouseTrip is getting demolished by Airbnb.
Let's try a different publicly available metric of success. Let's look at supply in Europe. Let's compare the offering of 'entire homes' in a few major European markets, this number will only compare like properties and remove Airbnb's shared spaces from the equation. If those had been included, Airbnb's numbers would almost double in each market.
London - HouseTrip - 1784 London - Airbnb - 4329
Berlin - HouseTrip - 717 Berlin - Airbnb - 4155
Paris - HouseTrip - 2991 Paris - Airbnb - 9096
Barcelona - HouseTrip - 2175 Barcelona - Airbnb - 2459
And for fun,
NYC - HouseTrip - 1000 NYC - Airbnb - 10,249
PS - Airbnb has not already raised $220 million, they have raised just under $120 million.