A long time ago, I was at their offices and I asked them about this. If this is a limiter for you, I'm sure you could get a customized pricing plan from them if you reach out.
I believe AppSmith is a FOSS alternative, otherwise.
Thanks for mentioning Budibase. I'm the cofounder and I'd like to add one or two points.
On top of Retools functionality, Budibase also comes with an automation platform, internal db and a lot more flexibility when it comes to design and deployment.
