Bounty will continue to be led by its existing management team under Simon Williamson, who has been managing director since 2002.
The company distributes more than 3.4m product sample packs and 2.6m parenting guides every year to UK families expecting a child, or families with children up to pre-school age. Bounty is based in Welwyn Garden City, Hertfordshire, with 633 employees and reported revenues of almost £20m and profits of £3.5m in 2006.
Williamson said: "This is good news for our NHS and brand partners and for our growing UK member base of new and expectant mums. The combined company makes for a powerful and dynamic international media and marketing platform."
Bounty's partners include UK maternity hospitals and FMCG brands such as Procter & Gamble, Kimberly-Clark, Unilever, Johnson & Johnson and Asda.
Jason DeZwirek, chairman and CEO of Kaboose, said: "The acquisition of Bounty is the biggest and most exciting step we have made in our company's history. Bounty has an unparalleled market position in the UK and a fantastic recognisable brand with new and expectant families.
"The UK is Kaboose's second largest audience and the acquisition of Bounty will enable us to maximise relations with significant European online traffic. As we extend our strategy to international markets targeting the young family audience, we believe that we have identified the best company in Europe to meet our goals."
Kaboose owns several family websites on pregnancy, parenting, birthday parties, scrap-booking and education, including BabyZone.com, ParentZone.com, Kaboose.com, AmazingMoms.com, TwoPeasInABucket.com, BubbleShare.com, BirthdayInABox.com, Funschool.com and Zeeks.com.