On top of a drag and drop visual builder, Budibase comes with an automation platform (like zapier) , internal db, and a lot more flexibility when it comes to design.
We launched our cloud product 7/8 months ago and we just hit the 40,000 companies using Budibase.
Budibase is open source and you can run it on Docker, K8s, Digital Ocean, Raspberry Pi, ARM, and more.
If you are interested, check it out:
https://github.com/Budibase/budibase
To David and the team at Retool - congrats! I'm the cofounder of Budibase and it's wonderful to see you push the industry forward. But we're coming to get you :-)