Yes, both MessageDesk and Twilio Flex offer a Free Trial.
MessageDesk is designed for Large Enterprises, Medium Business and Small Business.
Twilio Flex is designed for Large Enterprises and Medium Business.
Pricing for MessageDesk Starts at $29/Month when Billed Yearly whereas for Twilio Flex Starts at $1/User.
Some top alternatives to MessageDesk includes Zoho Campaigns, SlickText, ExpertTexting, TextToHire, Senderium, MOBtexting, SimpleTexting, SendHub, Buddy Texts and Dash Notify.
Some top alternatives to Twilio Flex includes CometChat, CloudTalk, Five9, 3CX, Genesys PureConnect, MSG91, Infobip, Cloudonix, CommPeak, CloudContactAI and Messenger Communication Platform.