Trillian
Trillian is a Mac messaging app for private chats, team communication, and secure business or healthcare conversations across devices.
What is Trillian?
Trillian is a native Mac messaging app that helps people, businesses, and healthcare teams communicate in one place. It supports private and group instant messaging, presence and status sharing, and file or image exchange from the desktop. The Mac client is designed for everyday conversation workflows, with desktop notifications, a persistent menu bar presence, and searchable chat history that make ongoing communication easier to manage. Trillian also works across multiple platforms, including desktop, mobile, and web environments, so users can stay in sync between devices. For organizations, the service is used for secure internal messaging and can be deployed in cloud-hosted or self-hosted environments depending on business needs.
Key features
- Send private and group instant messages
- Share files, images, and screen captures in chats
- View presence and status updates for contacts
- Search chat history from the desktop client
- Receive desktop notifications and keep the app available from the menu bar
- Use the service across Mac, mobile, web, and other desktop platforms
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Safety overview
Status: Mostly safe
Trillian is a legitimate messaging app. It normally needs network access to send and receive messages, and it may stay available in the background so notifications and status updates continue to work. If you use it for work or healthcare communication, remember that messages, shared files, and contact details can be stored within the service according to your organization's setup. Keep it only if you use the account or service tied to it, and sign out before removing it from a shared Mac.
Recommendation: Keep Trillian if you use it for personal messaging or for workplace communication. If you no longer use the service, you can remove the app, but you may lose local chat history, saved sign-in details, and quick access to ongoing conversations on this Mac.
Common paths
/Applications/Trillian.app
Cache paths
~/Library/Caches/com.ceruleanstudios.trillian.osx
Support paths
~/Library/Application Support/Trillian
Preference paths
~/Library/Preferences/com.ceruleanstudios.trillian.osx.plist
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