How do I say "I don't agree" in Slack without sounding rude?

Replace it with "I see the benefits, but I'm not sure now is the right time" and a reason. Ending with a question keeps the conversation open.

Is it better to disagree in a thread or in a call?

A short, polite reply in the thread is fine for most decisions. If the thread goes back and forth more than twice, suggest a quick call.

How to disagree politely in Slack, with examples

Disagreeing in writing is harder than in a meeting because nobody sees your face. Acknowledge what is good about the idea, give one concrete reason and offer a way forward.

By Rubens JrUpdated October 16, 2026

How it looks in Slack

Write the draft the way it comes out, in any language. Press the BetterSend button in the composer, pick a tone, and the draft is replaced before you send.

Your draft

i dont think we should change to graphql now, is too much work and we have the deadline

Message #backend

Improve

What you send🤝 Diplomatic

#backend

I see the benefits of moving to GraphQL, but I'm not sure now is the right time with the March deadline. Could we keep REST for this release and plan the migration for next quarter?

What changed

The reply starts with what is right about the proposal, ties the concern to a concrete deadline and ends with a question that offers a path both sides can accept.

Do this inside Slack

The Slack app on Mac and Windows

The BetterSend desktop app puts its icon in the composer of the native Slack app. Double-click a message from a colleague to translate it or have it explained.