Pegasystems Inc. rallied 14 percent, the most since Nov. 10. The Cambridge developer of customer relationship management software had quarterly earnings of $2.3 million, or 6 cents per share, which beat the average analyst projection, Bloomberg data show. The results reversed a year-earlier loss. Revenue rose 26 percent to $103.5 million. The company said it added new industry-specific products and released a new version of its core business process management software.