The verdict
If you need one platform for webinars, on-demand content, hybrid and in-person events, pick BigMarker. If you mainly run larger, repeated webinars or training sessions, want paid events or certification, and already use other GoTo products, pick GoTo Webinar.
Expect a conversation with sales either way. For a small team that wants to sign up in five minutes and run a session that afternoon, I'd look at lighter tools first. Before you buy, run a trial event and check what data reaches your CRM and when. Ask each vendor which tier holds the features you need.