European alternatives to Desmos

Desmos earned its following honestly. The graphing calculator is fast, the interface is clean, and it works on any device without login. Teachers built whole lessons around it; students learned to visualise functions in minutes. The problem isn't quality — it's ownership and data flows. Amplify acquired Desmos in 2022 and folded it into a US curriculum platform. GDPR compliance exists on paper, but data processing happens under US jurisdiction, and the product roadmap now answers to Amplify's commercial interests, not the European classroom.

For EU schools operating under strict data governance, or school districts in Sweden, Germany, or France that need demonstrable EU data residency, that's a structural problem you can't paper over with a DPA addendum. The concern sharpened after the acquisition when Desmos began nudging users toward the broader Amplify curriculum suite — a direction that has nothing to do with why European teachers adopted the tool in the first place.

The EU alternatives here are genuinely strong. GeoGebra (Austria) is the most direct replacement: free, EUPL open-source, self-hostable, with graphing, geometry, algebra, spreadsheets, and classroom collaboration built in — and over a million community-created resources. NumWorks (France) covers the exam-approved calculator angle for students sitting IB, SAT, or AP with an intuitive app and a free web emulator. KAlgebra is the lightweight local option — GPL, no cloud, no data collection at all. Xcas (France) goes deeper into symbolic computation and is used inside HP Prime calculators and GeoGebra's CAS engine.