Mutual Life Insurance has tapped its investment unit to take part in a $26.5m round that increased the business relationship platform operator's overall funding to more than $40m.

US-based communications technology developer Affinity has reeled in $26.5m from a series B round that included MassMutual Ventures, the strategic investment vehicle for insurance firm Massachusetts Mutual Life Insurance.

Venture capital firms Advance Venture Partners and Sway Ventures co-led the round, which included fellow VC firm  Pear Ventures and private investor Lars Dalgaard. David T. ibnAle, managing partner of Advance Venture Partners, has joined Affinity’s board of directors.

Founded in 2014, Affinity provides software that analyses data across emails, calendars…