Yes, both CloudSocial and Twilio Flex offer a Free Trial.
CloudSocial is designed for Large Enterprises, Medium Business and Small Business.
Twilio Flex is designed for Large Enterprises and Medium Business.
Pricing for CloudSocial Starts at $13/Month when Billed Yearly whereas for Twilio Flex Starts at $1/User.
Some top alternatives to CloudSocial includes Zoho Social, Crowdfire, SocialBee, Buffer, SMhack, Hootsuite, Planable, Socialhoox, SocialMgr, Later, Broadcast, Astute Social, SocialHub, HipSocial by 500apps and SocialHuge.
Some top alternatives to Twilio Flex includes CometChat, CloudTalk, Five9, 3CX, Genesys PureConnect, MSG91, Infobip, Cloudonix, CommPeak, CloudContactAI and Messenger Communication Platform.