I've spent the weekend immersing myself in WebStudio - https://webstudio.is/
Absolutely blown away by the capability and foundational framework. Given it's truly open-source, I can imagine a future where Wappler adopts some of their UI design tools and Cloudflare worker model.
It would be an amazing partnership...and check out that Logo
Looks like a potential Open Source version of Wappler.
And that logo.. 
No dynamic data integration though. Basically Wappler Basic plan. Basic static sites only. Not really worth it.
It has CMS integration.. so doesn't dynamic data come from there? The website also shows variables in one of the screenshots. I haven't tried the app myself.
I haven't tried it myself, but looking at the website and watching a couple videos it doesn't appear to support databases.
There's all sorts of integrations available. Wouldnt it be great to see appConnect adopted...
For CMS or database you connect to services like Directus and Airtable, it uses the serverless philosophy. They have many integrations with other 3rd party services and you can run the site directly on the edge (cloud). That is what I could read from the website, haven't tried it.