The government today revealed the first raft of high-growth firms to become a part of its Future Fifty programme.
The 25 companies feature game developer Mind Candy and taxi service Hailo, as tech and media firms dominate the list.
The coalition hopes the initiative will help the firms grow into Britain's next generation of big businesses, and the scheme will provide tailored advice and support for the members.
Mind Candy is the devekloper behind hit game Moshi Monsters, which has more than 80m registered players, and is about to launch a movie about the creatures.
The company came tenth in Tech Track 100, a list of Britain's fastest growing firms, with annual growth of 190%, garnering it £46.9m in sales in 2012/13.
Mobile app Hailo took off after being founded just two years ago by a group including three cabbies, and is used by people to book fares with more than 42,000 signed-up drivers in London, New York, Boston, Chicago, Toronto, Barcelona and other locations.
Hailo London used some of its fleet to run new Future Fifty members to a meeting this morning, and tweeted: "Real pleasure to escort guests from #futurefifty this morning. Congrats to new members."
Android keyboard app SwiftKey was another to join the year-long scheme, and CEO Jon Reynolds said: "We are thrilled to have been selected for this year's Future Fifty scheme and that we have been recognised in such illustrious company.
"It is testament to our culture of innovation across and commitment to providing our users with the best possible smartphone experience. We look forward to working closely with the Future Fifty team and to gaining further exposure to the expertise offered by the scheme over the next year."