Sigstr Secures $5M Series A to Build the Next Generation Marketing PlatformHyde Park Venture Partners and Battery Ventures invest to fuel hiring, product innovation and record sales growth INDIANAPOLIS, August 22, 2017-- Sigstr, a cloud platform for employee email personalization, announced today it has secured $5 million in Series A funding. The round, which will be used to fuel product innovation and hiring, was led by Hyde Park Venture Partners and included participation from Battery Ventures, HubSpot, Grand Ventures and High Alpha Capital.