We see Retool and Flowdash as being pretty different and, in some cases, complementary. Flowdash is focused on the types of internal tools that are about managing repeatable workflows. By choosing this specific use case, we're able to focus on features that operations teams need as they scale: things like task assignment, documentation, analytics, and SLA's.
Seems like it provides a business logic backend, which Retool does not, and less customizability on the frontend. You could conceivably use Retool to build a frontend to a backend powered here. e.g. in their demo video instead of a Rails app, you could use Retool for the GUI and API calls instead.
They're just different. Retool has a more sophisticated app builder and is much more mature.
Retool can do pretty much everything this thing can do and more. I'm definitely keeping my Retool instance.