Yes, both TeamViewer and Zoho Assist offer a Free Trial.
TeamViewer is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Zoho Assist is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for TeamViewer Starts at $9/month when yearly whereas for Zoho Assist Starts at $10/User/Month when Billed Yearly.
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 Zoho Assist includes and undefined.