CryptPad
US alternative: Google DocsEnd-to-end encrypted collaborative documents and workspace suite built around privacy, open source software, and zero-knowledge design.
Fully European
Overview
CryptPad is a distinctive European collaboration product that offers shared documents, notes, spreadsheets, forms, kanban boards, and storage with end-to-end encryption. It stands out as a privacy-preserving alternative to mainstream collaborative suites because the service is deliberately designed around zero-knowledge principles. For Antimaga this is a high-signal submission: it is a real production product, strongly aligned with European digital sovereignty, and materially differentiated from US cloud collaboration defaults.