Nasuni scores $20M to build out storage sales effort

Nasuni, a company that helps distributed offices put their storage in the cloud and manage it securely, has $20 million in new funding to pay for new features and functions and expand sales and marketing.

The Series C round was led by a mystery investor, with other contributions from current backers  Flybridge, North Bridge Venture Partners, and Sigma, and brings its total funding to $43 million.

The Natick, Mass.-based Nasuni competes with companies like Panzura, TwinStrata and StorSimple (which was just acquired by Microsoft(s msft)) in that it lets companies pump their data into public or private clouds and manage it there.

Inside the firewall, Nasuni works with Microsoft Active Directory and supports the popular protocols — CIFS, NFS, iSCSI — that underly NAS and SAN storage. Outside, it can work with any of the major public storage clouds although right now it uses Amazon(s amzn) s3 as its primary storage back-end with Microsoft Azure as backup based on Nasuni’s assessment of their reliability. The data is encrypted from the get go, as well as throughout the process, so that no one — including Nasuni — can pry.

Given the Microsoft-StorSimple deal (the terms of which were not disclosed) the race by the cloud giants to acquire customers — and customer data — is on. That acquisition led to speculation that TwinStrata and Nasuni itself are on the block. Rodriguez denied that that is the case for his company. “We have bigger ambitions than that,” he said.