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What: Shares of AVG Technologies (NYSE:AVG) have popped today by as much as 14% after the company reported earnings.

So what: Revenue in the fourth quarter totaled $95.2 million, which was shy of the $96.4 million consensus estimate. The good news is that the non-GAAP earnings per share of $0.32 was well ahead of the $0.26 per share that the Street was expecting, showing that the company's efforts to optimize costs are paying off.

Now what: AVG also offered up rather rosy guidance. Full-year sales are expected to be $408 million to $420 million, which crushes the consensus estimate of $403 million. AVG sees adjusted earnings per share of $1.68 to $1.88 for 2013, also well ahead of the $1.44 per share in adjusted profit that analysts were modeling for. At the end of the year, AVG boasted a user base of 146 million.

Fool contributor Evan Niu, CFA, has no position in any stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.