Bitium, an enterprise software company that provides app management, single sign-on and analytics, has raised $6.5 million in Series A funding from Polaris Partners. The round also includes participation from previous investors including Amplify, Resolute VC, Double M Partners, Social Leverage, Karlin Ventures, Lazerow Ventures and Rob Glaser. Polaris managing partner Dave Barrett has joined the Bitium board.

Signifyd, a standalone risk and fraud prevention platform,  has raised $2 million in financing from Andreessen Horowitz, Data Collective, IA Ventures, QED Investors, Resolute.VC,...