TrialPay, which provides monetisation opportunities for online companies linked to transactions, closes a $40m round, with Visa among its new investors.

US-based transactional advertising platform TrialPay secured $40m in series C financing on Tuesday from investors including financial services company Visa, taking its overall funding to $55.8m.

Visa was joined in the round by venture capital (VC) firms Greylock Partners, DAG Ventures and QuestMark Partners, VC fund DFJ Growth and investment management firm T. Rowe Price, as well as unnamed existing investors.

TrialPay raised $12.7m in its February 2008 series B round, receiving funding from VC firms Index Ventures, Atomico…