Yes, both Slingshow and WebinarNinja offer a Free Trial.
Slingshow is designed for Large Enterprises, Medium Business and Small Business.
WebinarNinja is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Slingshow Starts at $37/Month when Billed Yearly whereas for WebinarNinja Starts at $24/Month when Billed Yearly.
Some top alternatives to Slingshow includes Adobe Connect, GoToWebinar, EasyWebinar, ClickMeeting, LiveWebinar, ezTalks Webinar, Zoom Video Webinar, WebinarGeek, WebinarNinja and Workcast.
Some top alternatives to WebinarNinja includes Zoho Meeting, GoToWebinar, EasyWebinar, ClickMeeting, LiveWebinar, ezTalks Webinar, Zoom Video Webinar, PowWowNow Webinar, WebinarJam and Communique Webinar Platform.