I'm looking for a product that is basically NS without the prebuilt record types. Essentially SuiteBuilder. I need to make an ERP/CRM/database for a small business. Budget is small and open source would be preferable. I want to bring my own database, or have a very easy way to export the data. I've tried Airtable, Zoho Creator, MS PowerApps and plenty of others but nothing is quite right. Retool looks best so far (and has byo database) but I'd need the $50 per user plan and the business can't afford that (it's in Poland so $50 per month is expensive). Basically, I want SuiteBuilder and the integration and customisation functionality of NS, but I don't need any of the existing record types and other functionality - I will build what we need myself. Does anyone have any suggestions?

Please share what you find