San Francisco-based network equipment maker Riverbed Technology says it has bought Wellington-based Aptimize to enhance its web optimisation portfolio.
Riverbed helps companies to move file and email servers from remote offices to data centres.
Aptimize, founded by Edward Robinson of Seatoun, and Derek Watson of Johnsonville, specialised in doubling the speed at which websites could be accessed, without extra software code or hardware.
Watson was the inventor and main developer of the company's "website accelerator" technology which consolidated and compressed files so pages were quicker for visitors to download.
A 27 per cent stake in Aptimize was sold for $1 million in 2009, and the company which took out the Cyber Gold prize at the Gold Awards this year.