Trillian is a proprietary multiprotocol instant messaging application created by Cerulean Studios. It is currently available for Microsoft Windows, macOS, Linux, Android, iOS, BlackBerry OS, and the Web. It can connect to multiple IM services, such as AIM, Bonjour, Facebook Messenger, Google Talk (Hangouts), IRC, XMPP (Jabber), VZ, and Yahoo! Messenger networks; as well as social networking sites, such as Facebook, Foursquare, LinkedIn, and Twitter; and email services, such as POP3 and IMAP.
Trillian no longer supports Windows Live Messenger or Skype as these services have combined and Microsoft chose to discontinue Skypekit, which was used for connection. They also no longer support connecting to MySpace, or a distinct connection for Gmail, Hotmail or Yahoo! Mail although these can still be connected to via POP3 or IMAP. Currently, Trillian supports Jabber (XMPP) and Olark.
From the Wikipedia article “Trillian (software)”, CC BY-SA 4.0
What is Trillian?
Trillian is a proprietary chat & messaging program for Windows from Cerulean Studios, LLC (developed by Cerulean Studios). The first release dates back to 2000. It is written in C++. Besides Windows, it is available for macOS, GNU/Linux, iOS and Android.
Installation and requirements
Official installers exist for 32-bit as MSI. The main installer is 34.9 MB. Installation asks for administrator rights. The installer supports unattended (silent) installation. An MSI package is available for deployment with Group Policy, Intune or Configuration Manager.
Updates and version history
The current version is 6.6.0.19, released on September 24, 2026. 18 versions are listed since September 4, 2024, each with links to its own installer files. That is about 6.9 releases a year.
Popularity and file types
Wikipedia has an article about it in 25 of our languages. Similar programs include Signal, Discord and Viber.
Pros / Cons
Pros
- MSI package for managed deployment
- Documented silent install
- Frequent updates (about 6.9 a year)
- Also runs on macOS, GNU/Linux and iOS
- Mature project (since 2000)
Cons
- Proprietary licence: check the terms and price
- No native ARM64 build
- 32-bit only
- Installation needs administrator rights
In short: Trillian is a chat & messaging tool for 32-bit PCs. It is actively maintained. Administrators can deploy it unattended.
Is Trillian safe to download?
- The file is served by trillian.im, the publisher’s own domain
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
F67474374EE3495AB14299ABD7CFC7779DD24F96A3F45585C7D6D550AA2DF653· Open the VirusTotal report for this hash - The link answered when we last checked it (October 22, 2026)
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Recent versions
All 18 versions ›18 versions over 3 years · about 6.9 a year
| Version | Date | Size | Files |
|---|---|---|---|
| 6.6.0.19Latest | September 24, 2026 | 34.9 MB | 32-bit MSI |
| 6.6.0.18 | August 28, 2026 | — | 32-bit MSI |
| 6.6.0.17 | July 20, 2026 | — | 32-bit MSI |
| 6.6.0.16 | June 26, 2026 | — | 32-bit MSI |
| 6.6.0.15 | May 26, 2026 | — | 32-bit MSI |
| 6.6.0.14 | March 5, 2026 | — | 32-bit MSI |
| 6.6.0.13 | February 18, 2026 | — | 32-bit MSI |
| 6.6.0.12 | February 6, 2026 | — | 32-bit MSI |
Install from the command line
Silent install ›winget install --id CeruleanStudios.Trillian -emsiexec /i trillian-v6.6.0.19.msi /qn /norestartmsiexec /x {ACAB30A5-2A36-45E4-B4A9-6B48232CC3CD} /qn /norestartRelated guide: How to use winget: install and update apps
Information
- Publisher
- Cerulean Studios, LLC
- Developer
- Cerulean Studios
- Category
- Chat & messaging
- Licence
- Proprietary
- Price
- See the publisher’s site
- Written in
- C++
- Interface languages
- multiple languages
- Requires
- Windows 11 / 10
- Architecture
- 32-bit
- Installer
- MSI
- Other platforms
- macOS, GNU/Linux, iOS, Android
- Version
- 6.6.0.19
- Released
- September 24, 2026
- First release
- 2000
- Added to the catalogue
- August 31, 2024
- Versions listed
- 18
- Updates / year
- 6.9
- Website
- trillian.im
- winget ID
- CeruleanStudios.Trillian
- MSI product code
- {ACAB30A5-2A36-45E4-B4A9-6B48232CC3CD}
Ratings and reviews
No reviews yet. Be the first to rate it.
Alternatives to Trillian
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Pidgin2.14.14Pidgin is a universal chat client, allowing you to consolidate all your different messaging apps into a single tool.Open source175.4K ↓
Frequently asked questions
Is Trillian free?
Trillian is proprietary (closed-source) software (licence: Proprietary). Whether it costs money depends on the edition: check the publisher’s site for prices and free tiers.
Is Trillian safe to download?
The download comes from trillian.im, which belongs to the publisher; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
How do I install Trillian with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Can Trillian be installed silently?
Yes. The silent install page lists the exact command for each installer, including msiexec for the MSI package.
Does Trillian run on ARM (Windows on Arm)?
There is no ARM64 build; Windows 11 on Arm can run the 32-bit version through emulation.
Where can I download an older version of Trillian?
The versions page lists all 18 versions with links to their official installer files, back to September 4, 2024.
What are alternatives to Trillian?
Signal, Discord, Viber, Telegram Desktop and Slack. The alternatives page compares them.
