How to Use Voice to Write Slack Messages Faster

Slack is where a lot of work happens, and a lot of typing: quick answers, status updates, explanations that grow into paragraphs. If you spend a good part of your day in the message box, speaking instead of typing is one of the simplest ways to win some of that time back.

Speaking is quick. A Stanford University, University of Washington and Baidu study found speech input about three times faster than typing on a smartphone keyboard, with fewer errors. You won't save that much on every message, but on anything longer than a line the difference adds up.

Here's how to build a voice-first Slack workflow, and where typing still wins.

The Problem with Typing in Slack#

Look at your last ten messages. Most are probably quick updates, simple questions or feedback: short on their own, but they add up, and each one pulls you out of whatever you were doing.

The Old Way#

1. Context switch: drop what you're doing to read a message.
2. Type: hammer out a response.
3. Edit: realise it sounds curt, and rewrite it.
4. Send.

The Voice-First Way#

1. Read: take in the message.
2. Speak: hold your dictation key and say the reply the way you'd say it to the person.
3. Cleanup: a tool like LumeVoice removes the "uhs", applies your self-corrections and fixes grammar and punctuation.
4. Check and send: read it once, then press Enter. LumeVoice pastes the text into the box; it never sends anything for you.

The time you win is in steps 2 and 3. Reading and the final check stay the same, and they should.

How to Set It Up#

1. Install a dictation app with a system-wide hotkey. LumeVoice runs on Mac and Windows, and on your phone (a keyboard on iPhone, a floating bubble on Android). On a Mac the default key is fn; on Windows it's Ctrl + Win.
2. Click into Slack's message box, or the reply box of a thread.
3. Hold the key, talk, release. The text appears where your cursor is.
4. Read it and press Enter.

If you'd rather start with what's built in, Apple Dictation on a Mac and Windows voice typing (Win + H) both work in Slack and are free. They type what they hear, though, so false starts and mid-sentence corrections end up in the message. On Copilot+ PCs, Fluid dictation in Windows voice typing goes a step further and corrects grammar, punctuation and filler words in English (as of October 2026).

3 Workflows for Slack Dictation#

1. The "Brain Dump"#

When you need to explain something complex, like an architectural decision or why a launch slipped, say it in one go instead of typing a wall of text. For longer explanations, double-press the key for hands-free mode so you don't have to hold it down. If you list points as you speak ("one…, two…, three…"), LumeVoice formats them as a numbered list your team can scan. Trim it with the keyboard before you send it.

2. Quick Replies#

For "Yes", "On it" or a 👍, typing or a reaction is just as fast; dictation earns its keep on replies longer than a line. For things you send again and again, like your calendar link, a standard handover note or where the release checklist lives, set up a snippet: say a short trigger phrase and LumeVoice puts in the saved text.

3. Threads#

Threads keep Slack tidy, but they're one more box to click into. Click Reply in thread, hold the key and talk. Because the text lands wherever your cursor is, threads, DMs and channels all work the same way, and so do Slack's desktop app and Slack in a browser.

Is It Weird to Talk in the Office?#

In an open-plan office it can feel odd at first, and it's less private than typing: people nearby hear what you say. Plenty of people dictate at home or in a quiet room, and save the keyboard for sensitive messages when others are around. A headset microphone helps, because it picks up your voice clearly without you having to raise it.

Speaking can also help your tone. When you say a reply out loud, you tend to phrase it the way you'd say it to the person, which often reads warmer than a terse typed one. If you want more control, LumeVoice's writing styles let you pick a style for each kind of app: something more casual for work chat like Slack and Teams, say, and the default for email.

The "Say It Shorter" Hack#

If you tend to ramble, the fix is to say less, not to hope the software will cut it down. LumeVoice keeps everything you say, minus the filler words and the bits you corrected, and it deliberately doesn't summarise. That's the right default for a dictation tool, because it never drops something you meant to include.

So when a message comes out long, it's often faster to dictate it again in two sentences than to edit the first version. After a few days you'll find yourself saying the short version first.

When typing still wins: one-word replies, emoji reactions, code, commands and anything you need to format character by character. Use whichever is quicker for the message in front of you.

Related Guides#

• How to write emails faster by voice
• How founders and leaders use voice dictation
• The best talk-to-text apps
• How to choose an accurate dictation app for Mac
• Best Dictation Software for Customer Support Teams and Agents
• Best Dictation Software for Recruiters: Notes, Outreach and ATS
• Dictation in an Open Office: Etiquette, Mics and Speaking Softly
• Voice Typing in Chrome: Every Way to Dictate in Your Browser (2026)