WebinarNinja offers Free Trial, but Vidthere does not.
Vidthere is designed for Medium Business and Small Business.
WebinarNinja is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Vidthere Starts at $10/Month when Billed Yearly whereas for WebinarNinja Starts at $24/Month when Billed Yearly.
Some top alternatives to Vidthere includes Zoho Meeting, Adobe Connect, GoToWebinar, BigMarker, EasyWebinar, ClickMeeting, LiveWebinar, ezTalks Webinar, WebinarNinja and webinar.net.
Some top alternatives to WebinarNinja includes Zoho Meeting, GoToWebinar, EasyWebinar, ClickMeeting, LiveWebinar, ezTalks Webinar, Zoom Video Webinar, PowWowNow Webinar, WebinarJam and Communique Webinar Platform.