Sonian, the Newton-based cloud archiving company, today announced it had secured $13.6 million in Series C funding from new strategic investor OpenView Venture Partners, joined by existing investors Summerhill Venture Partners, and Prism VentureWorks.

The new funding will be used to scale sales and marketing, according to a release.

“We are excited to work with Sonian,” said Scott Maxwell, OpenView’s Founder and Senior Managing Director. “It’s a dynamic company that is capitalizing on the opportunities that Big Data presents by offering a cost-effective, scalable e-mail archiving solution that maximizes the benefits of the cloud. Almost every company faces challenges regarding mailbox management and many of them are looking for a cloud-based solution like Sonian’s.”

Sonian claims to have doubled its user base in each of the past two years.

As GigaOM notes, missing from the new round was Amazon, who invested part of the company’s $9 million Series B in December 2010, and who Sonian claims remains a key partner. All told, the company has raised nearly $27 million thus far.

Image via PEHub