We have a total of 3 malware scanners on each server. We are one of the few providers that use this many malware scanners on the server.
One premium malware scanner is included for free that scans and automatically quarantines any suspicious files. We use ImunifyAV+ or ConfigServerXploit (CSX) as the premium scanner.
Another is a scanner that comes along with cPanel called ClamAV - this is the one you see in cPanel (Virus Scanner) and runs on demand.
The last one is Maldet - it does not come along with cPanel, but most hosting providers install it as it is a highly rated free scanner. This runs once daily and any suspicious files are quarantined.