Yes, both SalesIntelligent and Prospect.io offer a Free Trial.
SalesIntelligent is designed for Large Enterprises, Medium Business and Small Business.
Prospect.io is designed for Freelancers, Medium Business and Small Business.
Pricing for SalesIntelligent Starts at $50/Month whereas for Prospect.io Starts at $19/User/Month.
Some top alternatives to SalesIntelligent includes ZoomInfo SalesOS, ZoomInfo, ProspectIn, Prospect.io, SalesIntel, Introhive, LinkedIn Sales Navigator, Sales Booster by Leadspicker, Closely, Conversion Blitz, LiProspect and LeadIQ.
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.