Yes, both HelpHub and HelpKit offer a Free Trial.
HelpHub is designed for Medium Business and Small Business.
HelpKit is designed for Large Enterprises, Medium Business and Small Business.
Pricing for HelpHub Starts at $39/Month when Billed Yearly whereas for HelpKit Starts at $15/Month when Billed Yearly.
Some top alternatives to HelpHub includes Zendesk Support, Zoho Desk, Tidio Helpdesk, Freshservice, Freshdesk, Teamwork Desk, Support Hub, Motadata HelpDesk, HelpDesk, SysAid, Jitbit Helpdesk, Desky, LabiDesk, HESK, Helpjuice and KnowledgeBase.
Some top alternatives to HelpKit includes Notion, SmartSupport, FromNotion, HelpHub, Qualified, Workvivo, KnowledgeBase, Answerly, ClickHelp and IFTTT.