Yes, both CallRail and Relay offer a Free Trial.
CallRail is designed for Large Enterprises, Medium Business and Small Business.
Relay is designed for Large Enterprises, Small Business, Medium Business and Individuals.
Pricing for CallRail Starts at $45/Month whereas for Relay Starts at $9/month when yearly.
Some top alternatives to CallRail includes CallTrackingMetrics, Invoca, Calltracks, calltrak, TeleCapture, Call Tracker, Caller Insight, Call Metrics, Track Leads and CallTracking.
Some top alternatives to Relay includes and undefined.