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Page last updated at 15:43 GMT, Friday, 13 July 2012 16:43 UK

What could be the secret to 1bn success?

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YouTube was first sold for $1.6bn (£1bn) of Google shares and Skype for an estimated $2.6bn (£1.65bn). Start-up technology businesses can quickly become huge success stories.

But they do all have to start somewhere.

Richard Taylor visits the Founders Forum to investigate some of the start-ups looking for the right way to step up from being simply upstarts.

Read more: Rory Cellan-Jones on the 2011 Founders Forum

Follow the Click team on Twitter @BBCClick. And join the conversation on Google+ or Facebook.

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