Element
US alternative: SlackSecure communication and collaboration platform built on Matrix for messaging, voice, video, and interoperable workplace chat.
Perks not listed
Overview
Element is a real-time communications product for organizations that need secure messaging and collaboration with more sovereignty than mainstream US chat platforms. It is built on Matrix and is sold to governments, public-sector buyers, and enterprises that want control over deployment and interoperability. Official company pages confirm UK headquarters, regional European entities, and a female cofounder. This makes it a strong European alternative to Slack for privacy-sensitive and sovereignty-focused teams.