Threema Work

US alternative: Slack

Secure business messaging platform from Switzerland built around privacy, data minimization, and organizational control.

Fully European

Overview

Threema Work is the business product line of Threema, offering secure team messaging and mobile communication management for organizations. It provides controlled messaging and administrative features for regulated teams.

Why it is listed

Replaces

Slack

European signal

Reviewed as strongly European-aligned

Privacy and hosting notes

Official materials emphasize Swiss development and infrastructure, privacy by design, and controlled business deployment.

Funding and ownership

unknown