Yes, both TwentyThree and WebinarNinja offer a Free Trial.
TwentyThree is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
WebinarNinja is designed for Large Enterprises, Medium Business and Small Business.
Pricing for TwentyThree Starts at $1,499/Month whereas for WebinarNinja Starts at $24/Month when Billed Yearly.
Some top alternatives to TwentyThree includes Adobe Connect, GoToWebinar, EasyWebinar, LiveWebinar, ezTalks Webinar, Zoom Video Webinar, WebinarNinja, PowWowNow Webinar, WebinarJam and eWebinar.
Some top alternatives to WebinarNinja includes Zoho Meeting, GoToWebinar, EasyWebinar, ClickMeeting, LiveWebinar, ezTalks Webinar, Zoom Video Webinar, PowWowNow Webinar, WebinarJam and Communique Webinar Platform.