CMS provider Interwowen has acquired New York City based Optimost for $52 million in an all cash deal.

Optimost provides web optimization services for clients including Ask.com, Auto Trader, Delta Air Lines, FAO Schwarz, Lenovo, and MGM Mirage.

Interwoven said that Optimost’s software-as-a-service model will strengthen Interwoven’s offerings by adding real-time multivariable testing and Website optimization to its portfolio.

The acquisition is expected to be completed in the 4th quarter.