KickoffLabs
I picked up KickOffLabs a couple of hours ago and have been looking under the hood.
The UI isn't super flashy, and some aspects of the layout weren't immediately intuitive as I went back and forth; some items had a 'save' at the bottom or appeared to autosave, until you noticed another button at the top. It also wasn't immediately clear how to get back to the main dashboard once I was in 'Campaigns; in case you're wondering, you have to start a new campaign. Minor details. I'm just letting you know in case it saves you a bit of time.
Once I had familiarised myself, and watched the onboarding video, it was plain sailing.
This is my first attempt, which took about 30-minutes to create: https://kickofflabs.com/waitlist/health-summit-waitlist1 Feel free to test it and let me know if anything isn't working. There are tons more pre-built buttons you could add, for example: Spotify, Telegram, Twitch, Reddit, WhatsApp, Discord ......
I would say this one looks and feels like a solid product and I'm sure you can create campaigns within minutes once you get used to the layout.
Also, I changed the title and clicked the newly found 'saved' button and it didn't work, so just to note, I think you have to publish the page again to see the changes, which with hindsight is a good thing because I didn't notice I had 2 windows open and at one point saved the old version before I realised. The need to re-publish meant I didn't over right the updated version.
I also tested out the embed code and it was a simple cut and paste; I added it to Exposure, a previous AppSumo deal. It added the full 2 pages and didn't require any adjustment from me in terms of sizing: https://tranceformationstm.exposure.co/mbs-energy-fest-healing-activation-day
I've checked out a few of the templates and there's definitely lots of possiblity and options in terms of how you build and configure your space.
I think this is one of those products where there is always going to be more functionality to explore, and more that it can do if you have the technical skill and really want to customise it.
Reading through the comment threads, KickOffLabs have been around for the past 12 years, so this should be a keeper and provide value for years to come.