Duffel has raised $21.5m in Series A funding from investor Benchmark.
Benchmark was joined in this round by Blossom Capital and Index Ventures.
Duffel is yet to launch publicly but has been building out its platform which hopes to offer a seamless travel experience for travel management and tour operators for their end customers.
Steve Domin, Co-Founder and CEO of Duffel, said: “The travel industry is underpinned by archaic software and processes that are fundamentally prohibitive for the modern day traveller.
“We are reinventing the underwiring between online agents and the providers – airlines, hotels, transport operators – in much the same way that the payments world is changing for merchants, because of tools like Adyen and Stripe.”
Duffel will use the funds raised to hire more engineers and will continue to grow its team in London in preparation for launch this Autumn.
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Ophelia Brown, founder of Blossom Capital, said: “Duffel has been clear on its vision to improve the travel experience for everyone from day one.
“This is a great example of the way that European founders are becoming more ambitious than ever before.
“The pace of execution is outstanding and shows clearly the competitive advantage European founders have to hire exceptional talent in their home markets.
“We are delighted to support Duffel and its fast-growing team as they continue their journey.”