Yes, both Callback24 and Calls to Clients offer a Free Trial.
Callback24 is designed for Large Enterprises, Medium Business and Small Business.
Calls to Clients is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Callback24 Starts at $49/Month when Billed Yearly whereas for Calls to Clients Starts at $58.33/Month when Billed Yearly.
Some top alternatives to Callback24 includes ResponseTap, Calltracks, CallView 360, calltrak, TeleCapture, Call Tracker, Tracking Sales Calls, Calls to Clients, LiveCall and Callback Tracker.
Some top alternatives to Calls to Clients includes Retreaver, AvidTrak, Calltracks, CallView 360, Outleads, calltrak, TeleCapture, Call Tracking Pro, Call Tracker and TrackDrive.