Clients can sponsor short profiling questions that are accompanied with interest-specific prize draw incentives, to generate a fully opted-in prospect database of users that can be contacted by email, post or telephone.
Categories on the include travel, motoring, fashion, and house and home, which advertisers can use to target relevant users.
The clients determine the eventual data feedback and output format.
Brands that have already signed up to use the service include laser eye specialist Opitmax and the website .
Volker Wiewer, chief executive at eCircle, said: "The key to generating highly targeted leads is not to over-incentivise. It is no good offering a million pound draw for a newsletter because the information just isn't specific enough.
"So Brands2Win is about letting users choose the draws they enter -- consequently improving the feedback for our clients. The relevancy of the incentive and the targeted nature of the questions will guarantee the quality of the leads."