Yes, both SleekFlow and Twilio Frontline offer a Free Trial.
SleekFlow is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Twilio Frontline is designed for Large Enterprises, Medium Business and Small Business.
Pricing for SleekFlow Starts at $9/Month whereas for Twilio Frontline Starts at $20/User/Month.
Some top alternatives to SleekFlow includes Outgrow, ActiveCampaign, CleverTap, Moosend, Advize.ai, advos, Repshift, Wooly Platform, SupportChamp, Twilio Frontline, Respond.io, Easy Advocacy, Sociocs, Conversocial and ERIN.
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.