Shares of LivePerson Inc. (NASDAQ: LPSN) jumped on Friday following the cloud-based chat software company's first-quarter report. LivePerson beat out analyst estimates across the board, registering its best revenue growth in years. The stock was up about 9.6% at 3:45 p.m. EDT Friday.LivePerson reported first-quarter revenue of $58.2 million, up 14% year over year and about $1 million higher than the average analyst estimate.