ListLab currently manages more than 100 lists and insert programmes in the consumer market. Its managed portfolio covers all the main direct marketing areas from charity and investment to mail order and publishing, comprising 100m-plus records.
Last year, ListLab's established list brokerage department continued to grow, purchasing more than 50m postal, email and telephone records.
Scott Logie, strategy director at Occam, said: "The evolution of Zebra means that we must constantly and rigorously assess the various functions it houses.
"It became clear that list broking and acquisition was of chief importance to our clients, so this deal signifies our commitment to ensuring Zebra remains best of breed and ensuring that we can still answer the challenges our clients face every day."
Marcus Orme, managing director at ListLab, said: "We look forward to working alongside Occam and ensuring its clients continue to receive the high level of service they have come to expect. Occam's clients are clearly operating in a multichannel marketing environment, as are their customers and prospects."
Occam's other products include Prospector, a prospect data pool, and Reciprocate, the charity data pool.