Unify Square, a US-based software developer for professional conference call service Skype for Business, closed a series B round featuring Stanford University at $12.2m.
Computing company Microsoft and Bridge Bank as well as a range of angel investors also contributed to the extension.
Unify Sqyare closed the first tranche of the round at $8.2m in February this year, securing funding from Microsoft, Unify Square chairman Geoff Baldwin and several angel investors.
Unify Square markets tools for Microsoft Lync, which is in the process of being rebranded as Skype for Business. Its services include data analytics software that tracks call quality and employee satisfaction surveys.
The company has raised approximately $26.6m in equity funding and debt financing to date, according to regulatory filings and press releases. It intends to use the series B capital to further develop its software.
A version of this article first appeared on our sister site Global Corporate Venturing.