Yes, both Zipwhip and Twilio Flex offer a Free Trial.
Zipwhip is designed for Large Enterprises, Medium Business and Small Business.
Twilio Flex is designed for Large Enterprises and Medium Business.
Pricing for Zipwhip Starts at $35/Month whereas for Twilio Flex Starts at $1/User.
Some top alternatives to Zipwhip includes CometChat, Podium, MOBtexting, SimpleTexting, Twilio Flex, SMS.to, TextMagic, Buddy Texts, Cloudli TalkNText and CloudContactAI.
Some top alternatives to Twilio Flex includes CometChat, CloudTalk, Five9, 3CX, Genesys PureConnect, MSG91, Infobip, Cloudonix, CommPeak, CloudContactAI and Messenger Communication Platform.