Yes, both Twilio Frontline and Apollo.io offer a Free Trial.
Twilio Frontline is designed for Large Enterprises, Medium Business and Small Business.
Apollo.io is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Twilio Frontline Starts at $20/User/Month whereas for Apollo.io Starts at $15/User/Month when Billed Yearly.
Some top alternatives to Twilio Frontline includes Apollo.io, AroundDeal, CrankWheel, ZoomInfo Engage, Microsoft Dynamics 365 for Sales, Salesinteract, EngageBay Sales CRM, SalesCRM, SalesLoft, Salesvue, Closely, RingCentral Engage Digital, SalesReach and SalesHandy.
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.