Yes, both Zendesk Talk and Exotel offer a Free Trial.
Zendesk Talk is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Exotel is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Zendesk Talk Starts at $9/User/Month whereas for Exotel Starts at $1,000.
Some top alternatives to Zendesk Talk includes Nextiva, TalkDesk, uContact, HoduCC, Call Center Studio, TelebuHub, Zendesk Support, VoxDesk, Zendesk Chat and Freshdesk Contact Center (Formerly Freshcaller).
Some top alternatives to Exotel includes Nextiva, Knowlarity, CloudTalk, Servetel, Call Center Studio, TelebuHub, CallFire, VCC Live, Ozonetel CloudAgent, VoiceIQ and Twilio Flex.