Yes, both Mailshake and Instantly offer a Free Trial.
Mailshake is designed for Medium Business and Small Business.
Instantly is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Mailshake Starts at $58/User/Month whereas for Instantly Starts at $37/Month.
Some top alternatives to Mailshake includes Apollo.io, AroundDeal, CrankWheel, ZoomInfo Engage, OutreachCRM, MailChimp, lemlist, OutreachPlus, AutoPitch, Outreach, Use Outreach, Instantly, OutReachly by 500apps and SmartReach.io.
Some top alternatives to Instantly includes Snovio, lemlist, QuickMail, AutoPitch, Leadfeeder, Hotter Leads, SalesHandy, SmartReach.io, Mailshake, Warmer.ai and Woodpecker.co.