Despite its success in the U.K., the company is not yet profitable overall.
Last year, Secret Escapes' total revenue rose 75 percent from the year before. Saint said he was looking to double 2014's revenues this year, but did not disclose the revenue figure.
He added that the current funding round would be used to increase marketing, to help make existing markets profitable.
But Secret Escapes is not the only player in this market. Companies like Groupon and Time Out offer regular holiday deals to top destinations.
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However, Saint said that on competitors' websites, consumers often had to buy a holiday voucher first, before sorting out dates with an airline and hotel.
He added that Secret Escapes differentiated itself by allowing users to directly book their packages via the Secret Escapes website, as well as through the high standard of hotels.
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"There are quite a few people out there who have a poor imitation of the top-quality execution of our model," Saint said.
"I think if you look at the quality standards, the selection criteria, they don't come close to the stringent selection we have."