Yes, both Segment and Crisp offer a Free Trial.
Segment is designed for Large Enterprises, Medium Business and Small Business.
Crisp is designed for Individuals, Freelancers, Medium Business and Small Business.
Pricing for Segment Starts at $120/Month whereas for Crisp Starts at $25/User/Month.
Some top alternatives to Segment includes CustomerLabs CDP, BlueConic, Captain Metrics, Zylotech, Lexer, Acquia Marketing Cloud, BSI CDP, Gravito CDP and euromessage CDP.
Some top alternatives to Crisp includes ZoomInfo Chat, LiveChat, LiveEngage, Pure Chat, DeskMoz, MyLiveChat, Intercom, Smartchat, ChatFlow247, Freshchat and Let's Connect.