There are a variety of costs that go into producing a high-quality webinar. The first and most obvious is the cost of the webinar software itself.  While there are examples of free webinar software, they are typically limited in features and the number of people who can attend. Most webinar software companies also know that these events tend not to be one-offs. This allows them to offer subscription plans that provide better features than their free plans and include unlimited hosts or attendees. You can expect to spend between $150 to $500 per month for professional-level webinar software.