Yes, both Twilio Flex and Trakdesk offer a Free Trial.
Twilio Flex is designed for Large Enterprises and Medium Business.
Trakdesk is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Twilio Flex Starts at $1/User whereas for Trakdesk Starts at $9.99/User/Month when Billed Yearly.
Some top alternatives to Twilio Flex includes CometChat, CloudTalk, Five9, 3CX, Genesys PureConnect, MSG91, Infobip, Cloudonix, CommPeak, CloudContactAI and Messenger Communication Platform.
Some top alternatives to Trakdesk includes Zoho Desk, Zendesk Support, ManageEngine ServiceDesk Plus, Freshservice, Freshdesk, LiveAgent, HelpDesk, SysAid, Jitbit Helpdesk, Desky, Helprace, ReadyDesk, Sitehelpdesk, HESK, Help Desk Premier and BoldDesk.