I cofounded Airplane.dev which you may want to look at. Everything you build in Airplane is normal JS/Python/React etc code that you can store in your codebase, version control, setup environments against, etc.
We’re doing pretty well! The majority of people using Airplane aren’t comparing it to Retool or any other products, but rather to building internal tools in-house. Since Airplane takes a code-based approach there are lots of eng teams that try it out who would never otherwise consider the low-code/no-code platforms. So there’s a lot of addressable market.
Glad you liked Heap :) That was a much more crowded market!