Yes, both Help Sumo and Tidio Helpdesk offer a Free Trial.
Help Sumo is designed for Large Enterprises, Medium Business and Small Business.
Tidio Helpdesk is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Help Sumo Starts at $19/User/Month whereas for Tidio Helpdesk Starts at $24/month when yearly.
Some top alternatives to Help Sumo includes Zendesk Support, Zoho Desk, Tidio Helpdesk, Freshservice, Freshdesk, ProProfs Help Desk, Support Hub, HelpDesk, SysAid, Jitbit Helpdesk, Desky, ReadyDesk, HelpdeskEddy, LabiDesk, AzureDesk and Help Desk Premier.
Some top alternatives to Tidio Helpdesk includes Zendesk Support and Zoho Desk.