Microsoft Ventures has come onboard as an investor to help the conversational sales platform developer take its total funding to more than $30m.

Tact, the US-based creator of a conversational platform for salespeople, completed a $15m series B round on Monday featuring Microsoft Ventures, software producer Microsoft’s corporate venturing unit.

Venture capital firm Upfront Ventures led the round, which included Accel and Redpoint Ventures, the two investors that provided $11.2m in series A funding for the company in early 2014.

Tact has developed device-native technology that automates a salesperson’s tasks and allows them to interact with tools like their phone, email or LinkedIn…