The Pegasus commercial spyware gets a lot of press, but there are other companies out there selling malware and spyware to law enforcement agencies and governments.
Cytrox is one and their product is called Predator.
Predator spyware uses in Chrome, Android zero-day exploits • The Register
Here is a report from The Citizen Lab looking at the two spyware products:
A few weekends back another article that included work by the Canadian based, Citizen Lab, was included in my weekend reads:
Clive Catton MSc (Cyber Security) – by-line and other articles