The company was created by ex-TUI managing director Chris Mottershead last year.
Group distribution director Nishma Robb said: “We selected Designate to help with our website strategy and website design across our specialist travel businesses due to their considerable experience in the Travel sector and their innovative approach.”
The agency’s digital creative director, David Bee, said: “We’re looking to offer more than just a standard booking site. We believe the process of choosing and booking a holiday should reflect the enjoyment of the product you’re buying – a holiday.
“It’s an exciting project as Travelzest have a vision that we believe will make them stand out in the market.”