$20B invested in 1,300 B2B SaaS companies from 2004 to 2014 per PitchbookData, Inc.

https://s3.amazonaws.com/filecache.drivetheweb.com/mr5ir_uplandsoftware/97/download/UPLD+-+IR+Deck+Roth+Conf+3-13-17+FINAL.pdf