I am likely to launch a webinar series with some partner companies that is targeted at individuals. Initially we might be as small as 50 - 100 attendees at first but it has the potential to be hundreds and even thousands over time. I'd like to be as economical as possible at first. Don't want to buy an enterprise solution and run myself. Want to be very economical. Capabilities needed: show PPT, attendees ask questions...at some point would like to be able to poll the audience and more. But pretty simple.
I've looked at GoToWebinar which is $499/month for up to 1,000 attendees but you can't go beyond that. Am just starting to research beyond that.