Vocus reported a slight one percent increase in fourth quarter revenue to $47.5M as net loss widened to $3.8M, up from $3.2M for the same period of 2012.

Rick Rudman, CEO of the PR and marketing software provider, said revenue, earnings and cash flow exceeded expectations. He added that the results reflect the "strength and stability of our PR product," as well as success targeting the mid-sized market.

The company ended the year with more than 16,800 subscription clients, down slightly from 2012. Rudman said selling higher value plans and "churn" from eliminating its small-business edition led to those results.

Net loss for the year was $21.8M, down from $23.6M a year earlier. Revenue for 2013 was just under $187M, compared with nearly $171M in 2012.

Vocus expects 2014 revenue from $182M-$183M.

Vocus shares are trading around $11.85, at the midpoint of its $8.05-$15.57 range over the past year.