Sound professional
in every Slack channel.
BetterSend adds an AI Improve button directly into Slack Web. Rewrite your message with the right tone — professional, concise, confident, or diplomatic — before you hit send.
Works on app.slack.com · Free forever · No credit card
See it in actionRewriting the same Slack message three times?
You draft a message to your team, delete it, and start over — unsure if it sounds rude, too casual, or just non-native. Your standups, async updates, and DMs all happen in English, even if it isn't your first language. BetterSend rewrites your draft in one click, right in the Slack composer.
A native app, not a browser tab
BetterSend runs inside the Slack, Microsoft Teams and WhatsApp desktop apps, on macOS and Windows. Same account, no browser in the middle.
- Slack
- Microsoft Teams
The button in the composer
While you type in Slack, Teams or WhatsApp, a small BetterSend button appears next to the field. Click it, pick a tone, replace the draft.
Double-click a message
Double-click anything someone sent you to translate it or have it explained, right there, without leaving the conversation.
See the difference instantly
One click transforms your message — without changing your meaning.
Before
“hey just checking if someone looked at the thing i sent last week about the deployment”
After
Professional“Hi — just following up on the deployment question I sent last week. Could you let me know if it's been reviewed? Happy to jump on a call if helpful.”
13 tones for every Slack situation
From diplomatic to direct, concise to warm — choose the tone that fits the conversation.
Translate Slack messages in 44 languages
Write to international teammates in their language — right inside Slack Web.
Original (EN)
“Hey, could you check if the issue is resolved on your end? Let me know if you need anything from me.”
“"Ei, poderia dar uma olhada nesse problema quando tiver um momento? Acho que precisamos conversar antes de avançar."”
Write in your language. Send in theirs.
Mix Portuguese, Spanish, French — whatever comes naturally. BetterSend turns it into one polished message in the language you need.
You typed
Mixedoi team, vamos cooperate on the new release pq the deadline is tight e preciso review antes de friday
BetterSend sends
Hey team — let's team up on the new release. The deadline is tight, so I'll need to review it before Friday.
Set "Write in" to English (or any of 44 languages) once. Every Improve uses it.
How BetterSend compares
Other tools translate text. BetterSend rewrites it like a native speaker would — inside the app you're already in.
| Feature | BetterSend $4.99/mo | Grammarly $12/mo | DeepL Write $8.74/mo | ChatGPT $20/mo |
|---|---|---|---|---|
| Works inside Slack, Gmail, WhatsApp — no copy-paste | ||||
| Writes inside the Slack, Teams and WhatsApp desktop apps | ||||
| Mixed-language input (write in PT, send in EN) | ||||
| 13 tones (Professional, Diplomatic, Confident…) | ||||
| One-click translation in the conversation | ||||
| Never stores your messages | ||||
| About $3.33/month on the annual plan |
Comparison reflects publicly documented features as of 2026. Trademarks belong to their respective owners.
Grammar was never the hard part
Tone, not spell-check. Thirteen of them, because disagreeing with your manager and disagreeing with your teammate are not the same message.
It reads the draft you already wrote. The rewrite keeps your meaning and your structure, so what goes out is still yours.
You send it, never us. BetterSend only suggests, nothing leaves until you press Enter, and nothing you wrote is stored.
Privacy-First by Design
BetterSend only runs when you click Improve or Translate. Your messages are never stored, auto-scanned, or sent anywhere without your explicit action.
Only runs when you click — never in the background
Messages are processed and never stored
No tracking, no scanning, no passive reading of your conversations
Frequently asked questions
You do not have to trust us
50 AI actions every month, free, forever. No card, no trial that quietly ends. If 50 better messages do not convince you, do not subscribe.
Write better on Slack starting today
Get the desktop app for macOS or Windows, or install the Chrome extension. Same account, the same 13 tones.