Reports have suggested interest from trade and private equity groups led Experian to re-evaluate its investment in PriceGrabber.
Analysts have suggested that AOL could be interested in acquiring the business.
Aggregate traffic to Pricegrabber's US and UK sites has increased from 17m unique users at the time Experian bought the business to 26m.
The bulk of Pricegrabber's success has been achieved in the US, whereas the UK has recently proved a tough market for price comparison sites.
The Daily Mail & General Trust is expected to close down its price comparison site SimplySwitch.com soon, after it failed to meet performance targets.