Yes, both Dixa and Zendesk Talk offer a Free Trial.
Dixa is designed for Large Enterprises, Medium Business and Small Business.
Zendesk Talk is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Pricing for Dixa Starts at $39/User/Month whereas for Zendesk Talk Starts at $9/User/Month.
Some top alternatives to Dixa includes Zendesk Support, Zoho Desk, Tidio Helpdesk, Zendesk Talk, Freshservice, Freshdesk, ClickDesk, LiveAgent, HelpDesk, SysAid, Jitbit Helpdesk, Desky, Help Scout, HelpdeskEddy, LabiDesk and Zendesk Chat.
Some top alternatives to Zendesk Talk includes Nextiva, TalkDesk, uContact, HoduCC, Call Center Studio, TelebuHub, Zendesk Support, VoxDesk, Zendesk Chat and Freshdesk Contact Center (Formerly Freshcaller).