SymLearning is a web platform for symbolic regression from Mentron KLG. Instead of an opaque black-box model, the algorithm searches your data for mathematical formulas that describe the relationships; the result is a transparent model that, according to the vendor, needs little computing power and can be built into software or processes. Domain knowledge can be supplied as constraints, and a large number of mathematical symbols and functions is supported. According to the vendor, the backend is written entirely in Rust. The product is offered online without installation; for those who want to run it themselves there is an on-premises variant on their own infrastructure.
Mentron KLG is headquartered in Uzwil, Switzerland; no foreign owner is named on its website. The website does not state where the online version is hosted. With the on-premises variant, your data stays, in the vendor's words, within your own infrastructure. Switzerland is not in the EU but is an EFTA country with an EU adequacy decision. For the online version, ask about the hosting location and a data processing agreement.