Predictive text in Element: how Lightkey works in Matrix chats
Yes, Lightkey works in Element, the Matrix chat app. As you type in a room or a direct message, Lightkey predicts your next words in grey right where you're typing. Press Tab to accept, or keep typing. It also suggests spelling corrections as you go.
How it works
Install the Lightkey desktop app and open Element on Windows. Predictions appear in the message box of every room, with nothing to set up in Element or on your home server.
What it helps you write in Element
Rooms and teams have their own vocabulary, and you repeat it every day. Lightkey learns yours, for example:
“Morning all, quick update on the release.”
“I've shared the document in this room.”
“Can we take this to a call?”
“Thanks, closing this thread.”
Spelling suggestions appear above a misspelled word; accept the one you want, or ignore it.
Private by design
Lightkey's prediction engine runs on your own computer. What you type isn't sent to a cloud service to get a prediction, and Lightkey keeps working offline. Element users choose it for encrypted, self-controlled chat, and predictions that stay on the device fit that choice.
Get started
Download Lightkey and start your free 30-day trial.
Open Element and start typing. Press Tab to accept a prediction.
Lightkey works in more than 80 languages and in virtually every app on your Windows PC. See all supported apps.
Also read: predictive text in Signal and Mattermost.
Frequently asked questions
Does Lightkey work in Element?
Yes. Lightkey works in the Element desktop app on Windows, in rooms and direct messages..
Does Lightkey work with encrypted rooms?
Yes. Lightkey predicts as you type on your own computer, before anything is sent, so it works the same in encrypted rooms.
Does Lightkey upload my messages?
No. Lightkey's prediction engine runs on your computer, so your messages aren't sent to a cloud service to get predictions.
Does Lightkey work in other team chat apps?
Yes, including Mattermost, Slack, Microsoft Teams and Signal.



