Yes, both SendBird and Twilio Flex offer a Free Trial.
SendBird is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Twilio Flex is designed for Large Enterprises and Medium Business.
Pricing for SendBird Starts at $399/Month whereas for Twilio Flex Starts at $1/User.
Some top alternatives to SendBird includes CometChat, Plivo, Twilio Flex, MessageBird, MSG91, Infobip, PubNub, Stream Chat, ZEGOCLOUD and Messenger Communication Platform.
Some top alternatives to Twilio Flex includes CometChat, CloudTalk, Five9, 3CX, Genesys PureConnect, MSG91, Infobip, Cloudonix, CommPeak, CloudContactAI and Messenger Communication Platform.