Yes, both Prospect.io and Adapt Engage offer a Free Trial.
Prospect.io is designed for Freelancers, Medium Business and Small Business.
Adapt Engage is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Prospect.io Starts at $19/User/Month whereas for Adapt Engage Starts at $25per Seat.
Some top alternatives to Prospect.io includes Apollo.io, AroundDeal, CrankWheel, ZoomInfo Engage, Reply, Outreach, ImagineSales, Adapt Engage, Sales Booster by Leadspicker, OutReachly by 500apps, Respond.io, Closely and SalesHandy.
Some top alternatives to Adapt Engage includes Apollo.io, AroundDeal, CrankWheel, ZoomInfo Engage, Salesmate, Skylead, SalesLoft, ImagineSales, Cirrus Insight, LaGrowthMachine, Salescamp, Sales Booster by Leadspicker and SalesHandy.