Waystar Inc, a private equity-owned vendor of software that helps hospitals and doctors' practices manage their finances, has tapped banks for an initial public offering that could value it at as much as $8 billion, including debt, according to people familiar with the matter. Waystar's owners, buyout firm EQT AB and Canada Pension Plan Investment Board (CPPIB), have hired Goldman Sachs Group Inc and JPMorgan Chase & Co to advise on the listing, the sources said.