This service provides end-to-end and zero-access encryption so only recipients can read messages and attachments, and it blocks email trackers to prevent senders from monitoring activity. Data residency in Switzerland adds legal protections against mass surveillance.

Available across web, desktop, iOS, and Android, the platform includes features like alias creation, password-protected and expiring messages, scheduler/undo, spam and phishing protections, and a one-click migration tool to import emails, labels, contacts, and calendars. Free accounts are available alongside paid tiers that add storage, custom domains, and advanced features.

All apps and encryption libraries are open source and undergo independent audits. The offering also includes business and family plans, and is widely used by journalists, activists, organizations, and individuals who prioritize communication privacy.