** Shares of software firm Appian's APPN.O rise 5.2% to $32 premarket

** Co raises annual revenue forecast to between $680 million and $688 million, compared to a previous range of $680 million to $684 million

** Analysts on average were expecting annual revenue of $679.11 million, according to data compiled by LSEG

** Co also raises its adjusted profit forecast for the full year in the range 18 cents to 26 cents per share, vs prior view of 17 cents to 22 cents per share

** APPN posts Q1 revenue of $166.43 million, beating analysts' estimate of $163.35 million

** As of last close, APPN stock down 7.8% YTD

(Reporting by Padmanabhan Ananthan)

((Padmanabhan.Ananthan@thomsonreuters.com))