Predictive text in Slack: how Lightkey works in Slack messages
Yes, Lightkey works in Slack. As you type in a channel, a DM or a thread, 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 Slack. Predictions appear in the message box, with nothing to set up in Slack.
Lightkey works in the Slack desktop app on Windows. In Slack in the browser, use the Lightkey extension for Chrome or Edge; it works together with the desktop app.
What it helps you write in Slack
Many Slack messages repeat from day to day. Lightkey learns the ones you write, for example:
“Thanks, I'll take a look.”
“Can you share the link?”
“Let's discuss it in the standup.”
“Just pushed the fix, should be live within the hour.”
Spelling suggestions appear above a misspelled word, so you can fix a typo before you hit Enter.
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.
Get started
Download Lightkey and start your free 30-day trial.
Install the Lightkey extension for Chrome or Edge if you also work in the browser.
Open Slack 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 Microsoft Teams and WhatsApp.
Frequently asked questions
Does Lightkey work in the Slack desktop app?
Yes. Lightkey works in the Slack desktop app on Windows, in channels, DMs and threads..
Does Lightkey work in Slack in the browser?
Yes, through the Lightkey extension for Chrome or Edge, which works together with the Lightkey desktop app.
Do I need a Slack integration or admin approval?
No. Lightkey isn't a Slack app and doesn't connect to your workspace. It works on your own computer as you type.
Does Lightkey work in other chat apps?
Yes, including Microsoft Teams, WhatsApp, Telegram, Signal and Discord.




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