BOSTON--Salesforce.com has acquired a tiny company that created an add-on to its hosted services for purchasing and managing Google-driven Web advertising campaigns.

The acquisition brings the operations of Kieden, a four-person operation with 45 customers, to Salesforce.com. Financial terms were not disclosed.

Salesforce.com CEO Marc Benioff and Kieden co-founder Kraig Swensrud detailed the purchase at a press and customer event in Boston on Monday.

Swensrud said that the service, called Salesforce for Google AdWords, lets people launch a Google AdWords advertising campaign from a Salesforce.com application. It will cost $300 per company per month.

Read more about the Saleforce Adwords add-on from Kieden at CNET News.com.