The charities are , , , , , , and the .
started tests earlier this year to establish the most effective method of first capturing qualified potential donor information, and then converting it to a contributing customer.
The company developed a successful system of capturing details online and then converting it within 24 hours via the telephone.
Geoff Pullin, lead generation manager at Lifestyles Online, said: "We found that consumers having shown initial interest online, responded well to a personal call to cement their donorship status.
"We make sure that the consumer knows what charity they are agreeing to hear more from and that the follow-up calls are made within 24 hours.
"Using this method coupled with our unique data profiling and cleansing tools, we found that we can deliver thousands of new donors to this conglomerate of charities each month, which is why they are establishing a long term arrangement with us."
Lifestyles Online was founded three years ago and now has offices in Bath, Berlin, Paris and Madrid.