Trillian est léger, compact, intuitif, multi-protocoles et multi-plateformes incluant la disponibilité de l'application sur les smartphones de 3 des 4 principaux OS du moment. En effet, Trillian est disponible sur Windows, macOS, iOS (iPhone/iPad/iPod Touch) et Android. Côté fonctionnalités, il permet de se connecter aux réseaux AIM, ICQ, IRC, Facebook, Google Talk, XMPP/Jabber et olark et peut se personnaliser grâce à une système de skins et de plug-in qui peuvent ajouter des fonctions comme la visioconférence.
Trillian est disponible en deux versions : l'une gratuite et financée par la pub, l'autre est payante (à raison de 20$/an ou 60$ pour la licence à vie) et dénuée de pub.

Trillian
Version actuelle : 6.6
Windows, macOS, Linux (DEB), iOS, Android
Changelog Trillian 6.6 build 18 (Windows - 28/08/2026)
Feature
- Chat Window: Attach several pictures at once by dropping or inserting them
- Chat Window: Multiple files or folders now compress into a single archive when sent
- Chat Window: New toggle to send images in-line or as attachments
- History: View a day as text even when chat history is in the cloud
- Notifications: Sounds for outgoing reactions and reaction removals, with a single sound setting
- Status: Choose the hour when status messages clear
Changed
- Spell Check: Updated the English autocorrect rules
Fixed
- Chat Window: Clearer error when dropping files while file sharing is disabled
- Chat Window: Dropped files fall back to peer-to-peer when server hosting is unavailable
- Chat Window: Fixed an intermittent crash when opening windows
- Chat Window: Fixed an issue where some HTML-encoded text could display incorrectly
- Chat Window: Fixed messages that could not be deleted
- Chat Window: Fixed outgoing message sounds and events sometimes not firing
- Chat Window: Fixed undo in the message box not always restoring text
- Chat Window: In-line images now highlight when selected
- Contact List: Conversation tabs now group under the contact's visible group
- Contact List: Fixed new contacts sometimes filing into the wrong group
- Contact List: Fixed tab settings being lost after upgrading
- Emoticons: Fixed clearing a GIF search not restoring trending results
- Emoticons: Fixed the emoticon button reopening the picker instead of closing it
- Emoticons: Recently used emoticons no longer shuffle while the picker is open
- General: Fixed a rare crash when deleting an account
- History: Fixed an issue saving images from the timeline
- History: Fixed the search box position when searching all conversations
- History: Fixed the View button position on the Images view
- Installer: Clearer errors for missing or damaged installation files
- Installer: Fixed Trillian failing to load when components were not signed
- Installer: Silent installs no longer stall behind hidden error dialogs
- Media: Fixed canceled downloads leaving images partially grey
- Media: Fixed previews for links whose web address contains encoded characters
- Media: Fixed sending media to contacts on other domains sometimes failing
- Media: Fixed the same image downloading twice corrupting its cached copy
- Media: Saving images now follows the domain media sharing policy
- Notifications: Fixed duplicate reaction sounds after upgrading
- Notifications: Fixed reaction sound settings not surviving a restart
- Sign In: Fixed a crash that could occur when closing the sign-in window
- Sign In: Fixed Cancel closing Trillian instead of returning to the sign-in screen after a two-factor retry
- Sign In: Fixed a denied or expired two-factor push leaving sign-in stuck
- Sign In: Fixed label alignment while a two-factor push is pending
- Spell Check: Fixed autocorrect only working in English
- Spell Check: Fixed autocorrect occasionally replacing words with unrelated text
- Spell Check: Fixed regional languages (like British English) not spell checking
Changelog Trillian 6.6 build 46 (macOS - 29/06/2026)
Feature
- Media: Added Klipy GIF support
- Chat Window: Added /silent slash command for sending a silent message
Fixed
- Chat Window: Fixed message deleting when using non-Trillian media
- Chat Window: Editing a message with an @mention no longer removes the @mention
- Chat Window: Pasting text that begins with / is no longer treated as a slash command
- Chat Window: Fixed scrolling when using an external mouse
- Login Window: Combobox fields are now vertically centered
- Login Window: Fixed app showing no window when restored from a miniaturized state
- History: Fixed an occasional crash during search
- Media: Tenor GIF links now strip the URL fragment before extracting the GIF ID
- Markdown: Added spacing between list items
- General: Status now set to offline on lid close
- General: Fixed an occasional crash when handling text ranges
Changelog Trillian 6.6 build 5 (Linux - 28/07/2026)
Feature
- Channels: Hover tooltip showing display name, real name, topic, team, and member count
- Chat Windows: Link colors now adapt to each message bubble, staying readable on every accent color
- Chat Windows: Silent message sending support
- Emoji: Updated to the latest Emoji 11 set
- Media: Updated file attachment bubbles
- Message Delete: Support for deleting of messages
- Message Edit: Support for editing of messages
- Teams: Hover tooltip showing display name, real name, member and channel counts, and purpose
Fixed
- Chat Windows: @mention and slash-command suggestions can now be selected with the mouse or keyboard
- Chat Windows: Sending a message now scrolls to it even when scrolled up through history
- Chat Windows: Fixed a crash when opening links or menus on Wayland
- Chat Windows: Fixed the chat view going blank, cropped, or flickering when resizing the window
- Chat Windows: YouTube preview play button now renders sharp on HiDPI displays
- Images: Inline media corners are now correctly rounded on HiDPI displays
- Status: Auto-away now works on Wayland across desktop environments
- Distro: Tray icon now appears reliably on KDE and modern GNOME (Ubuntu)
- General: Fixed Trillian sometimes not starting again after being quit
- Performance: Reduced disk writes when resizing or moving windows