Yes, both Dixa and Okta offer a Free Trial.
Dixa is designed for Large Enterprises, Medium Business and Small Business.
Okta is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Dixa Starts at $39/User/Month whereas for Okta Starts at $2/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 Okta includes Oracle Identity Management, SailPoint IdentityIQ, WSO2 Identity Server, Keycloak, Azure AD, Ping Intelligent Identity, Ping Identity, Teamstack, Auth0, Frontegg and Login-Master.