Deciens Capital and QED Investors co-led the round, which also featured returning backers Susa Venturea and SaaStr Fund.
Targeting banks and financial institutions, Treasury Prime offers automation software which aims to streamline back-office workflows.
It provides services for payments, automatic reconciliation, bank connectivity through APIs, and continuous accounting.
The firm is planning using its new cash for an expansion of its business capabilities in anticipation of more demand.