Rail and air upgrade platform Seatfrog has secured a Series A investment to the tune of $6 million.
The capital comes two years after its seed round of $1.2 million from Howzat Partners, the U.K.-based venture shop run by ex-Momondo execs David Soskin and Hugo Burge.
Howzat returned for the new round which was led by Octopus Ventures.
Seatfrog works by allowing users to bid for upgraded seats via a mobile app, securing a new ticket that is then sent to the device ahead of departure.
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Initially intended for air ticket upgrades, Seatfrog secured a deal with U.K. rail operator Virgin Trains (LNER) in 2017 to offer a similar service.
The top 30 airlines and leading seven rail operators in Europe
The new funding will be used to expand the team in its three locations around the world (headquarters in London, as well as Sydney and Hong Kong) and bolster its technology.
Seatfrog claims there are more than 37 million empty seats available annually on the top 30 airlines and seven leading rail operators in Europe.
This leads to "billions of dollars of unrealized ancillary revenue" being left on the table due to "manual, fragmented legacy processes", claims Seatfrog CEO, Ian Griffin.
Octopus Ventures will gain a seat for its partner Luke Hakes on the Seatfrog's advisory board, alongside Soskin, Burge and Sascha Hausmann from Howzat and ex-Qantas CEO, Simon Hickey.