Yes, both StructHub and HelpHub offer a Free Trial.
StructHub is designed for Large Enterprises, Medium Business and Small Business.
HelpHub is designed for Medium Business and Small Business.
Pricing for StructHub Starts at $129/Month when Billed Yearly whereas for HelpHub Starts at $39/Month when Billed Yearly.
Some top alternatives to StructHub includes KBPublisher, SmartSupport, Talisma KnowledgeBase, HelpHub, KnowledgeOwl, Qualified, Workvivo, PaceKB, KnowledgeBase, Whatis, ProProfs Knowledge Base and IFTTT.
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.