Not ready for prime time
I used HeySummit for a Virtual Summit I ran in November 2019. My VA worked with the platform starting in August—we'd originally thought we'd run the summit in September, but pushed it back for reasons unrelated to HeySummit. It was a good thing we'd started so early, as she needed to contact them weekly, if not daily at times, to clarify things. Like they said something about banner ads, but there was nothing in the Knowledge Base about where they would run or how to create them. The HeySummit customer service folks were NOT particularly responsive—at one point, we believe they disabled the Contact button on the website (yes, for everyone) to avoid having to respond to our reasonable and important queries.
The platform is visually attractive and the summit ran smoothly, but I would not recommend HeySummit to other users at this time. Hopefully they'll work through the glitches, fill in the omissions, and allow users a little more freedom to adapt to their specific needs. Until that happens, stay away.