Yes, both Zendesk Support and Transifex offer a Free Trial.
Zendesk Support is designed for Large Enterprises, Medium Business and Small Business.
Transifex is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Zendesk Support Starts at $19/user/month when yearly whereas for Transifex Starts at $1,549.
Some top alternatives to Zendesk Support includes Zoho Desk, ManageEngine ServiceDesk Plus, Deskero, Support Hub, HelpDesk, Desky, Help Scout, Salesforce Service Cloud, ReadyDesk, Sitehelpdesk, HESK and BoldDesk.
Some top alternatives to Transifex includes Smartling, SDL Worldserver, Lingotek, Lokalise, Localize, Lokally.io, Localizely, Polyflow and Translized.