Yes, both TeamViewer and HaloPSA offer a Free Trial.
TeamViewer is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
HaloPSA is designed for Large Enterprises, Small Business and Medium Business.
The starting price of TeamViewer begins at $9/month when yearly, while pricing details for HaloPSA are unavailable.
Some top alternatives to TeamViewer includes GoToMyPC, RemotePC, VNC Connect, RemoteToPC, AnyDesk, Splashtop Remote Support, LogMeIn Pro, Splashtop Business Access, FixMe.IT, LogMeIn Rescue, NinjaOne (NinjaRMM) and GoTo Resolve.
Some top alternatives to HaloPSA includes and undefined.