Seatfrog, which auctions off empty rail and airline seats, lands £4.5m

Seatfrog, an app which lets people bid for empty first-class rail or airline seats, has raised £4.5m in a Series A funding round led by European VC firm, Octopus Ventures.

The basic concept is that users can bid on available premium seats, which if successful means they can easily upgrade their seat after buying their original ticket up until the time of departure.

The funds will be used to increase the senior team in its London and Sydney offices, to grow the company and to develop its product.

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