I‘ve used Webflow, which is a very fast tool for building websites.
It has basic CMS, SEO functions, some easy-to-use templates, and a relatively active user community. It is quite suitable for building display websites, but cannot achieve more complex application capabilities.
Well, I've tried both bubble and webflow before for a summer school project. Back then I was trying to build a website that deliver concrete info about zero-emission and why and how we, as citizens need to go green. I started with Webflow, but later realized I needed the website to be more interactive and able to handle more data. I switched to Bubble. It worked well at first, but as the app grew with more content, it got slowed down in terms of responding and loading.