Orneos is a European cloud and collaboration service designed to bring professional communication and everyday productivity tools together in one account. Registration includes a professional email address ending in @orneos.eu, with webmail access and support for standard IMAP and SMTP protocols. Its online workspace includes file storage and synchronization, shared calendars, contacts, messaging, video calls, photos, notes, tasks, password management, and collaborative tools such as an online spreadsheet and Deck.

Users can access their files and other services from different devices. Orneos also supports the Nextcloud desktop client for Windows, macOS, and Linux, along with the Nextcloud mobile app for iOS and Android, which connects to an Orneos account and provides access to files, calendars, and contacts. The service says its infrastructure is hosted in Europe, is designed to respect user privacy, and complies with the GDPR. It also states that it does not use advertising tracking. Orneos offers free registration and provides information about its applications, messaging, and pricing on its website.