Yes, both oClient and Apollo.io offer a Free Trial.
oClient is designed for Medium Business and Small Business.
Apollo.io is designed for Large Enterprises, Medium Business and Small Business.
Pricing for oClient Starts at $1/Month whereas for Apollo.io Starts at $15/User/Month when Billed Yearly.
Some top alternatives to oClient includes Apollo.io, AroundDeal, CrankWheel, ZoomInfo Engage, Salesmate, EngageBay Sales CRM, Salesdash CRM, Client Book CRM, AllClients, SalesLoft, ImagineSales, SalesHandy and Client.
Some top alternatives to Apollo.io includes AroundDeal, CrankWheel, ZoomInfo Engage, Outreach, Adapt Engage, LinkedIn Sales Navigator, Lusha, Seamless.AI, Use Outreach, OutReachly by 500apps, ZoomInfo and Closely.