Yes, both Instantly and Mailshake offer a Free Trial.
Instantly is designed for Large Enterprises, Medium Business and Small Business.
Mailshake is designed for Medium Business and Small Business.
Pricing for Instantly Starts at $37/Month whereas for Mailshake Starts at $58/User/Month.
Some top alternatives to Instantly includes Snovio, lemlist, QuickMail, AutoPitch, Leadfeeder, Hotter Leads, SalesHandy, SmartReach.io, Mailshake, Warmer.ai and Woodpecker.co.
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.