Kairo Post Copilot:your X co-writer,
right inside x.com

Kairo Post Copilot is a Chrome extension. Pick an angle on any post and it drafts a reply in your Brand brain voice. You read it, change it if you like, and press send on X yourself.

Add to Chrome · free with every plan See how it works

Works in Chrome, Edge, Brave and Arc on desktop.

x.com/home

Priya Raman@priya · 12m🔥

Hot take: most onboarding emails are written for the company, not the customer. Nobody reads step 4.

Pick an angle

👍 Agree + add👎 Disagree politely📖 Add my story❓ Ask a question

Kairo Post CopilotYour voice

Replying to @priya: Hot take: most onboarding emails are written for the company, not the customer. Nobody reads step 4.

Draft · 👍 Agree + add

Reply on XShorter Copy

Copilot never presses anything on X. You post it yourself.

Pick an angle, get a reply in your voice

Click the Kairo button under a post and choose how you want to answer: agree and add, disagree politely, add your story, ask a question, add a data point or keep it light. Or type a few words and Copilot polishes them.

Nothing is written until you pick an angle or type
Uses your Brand brain voice and your reply styles

Priya Raman@priya · 12m

Hot take: most onboarding emails are written for the company, not the customer. Nobody reads step 4.

Custom

Curious: what does the one email you'd keep say? Ours asks a single question and nothing else.

Nothing is written until you pick an angle or type your own words.

Clear the replies to your own posts

On your own post, press Load replies. Copilot brings in the replies you can see, sorts them and drafts an answer for many at once. You answer each one on X.

Questions, praise and critique, labelled
Every reply is still yours to send

Replies to your postDraft these 3

Sam OrtizQuestion
How do you decide what goes in email 1?
Lena FischerPraise
Saving this for our Monday review.
Dev Tools WeeklyCritique
Counterpoint: step 4 is where upsells live.

Scroll Radar: replies worth writing

While you scroll, a small 🔥 marks fresh posts on your topics that still have room for a reply. The scoring runs locally in your browser, and posts you don't click are never uploaded.

Maya Chen· 4m🔥 worth a reply
What's one onboarding email you actually liked?
Ops Daily· 2h
Our weekly roundup is out. 12 links on hiring.
Jon Park· 9m🔥 worth a reply
Trying to cut our signup flow in half. Ideas?
Ana Ruiz· 31m
Lovely sunset in Lisbon tonight.

Scored in your browser. Posts you don't open are never sent anywhere.

Notes on people, and ideas saved in one click

Keep private notes about the people you talk to. Save a post to your swipe file or Brand brain, import the bookmarks on the page, or turn any post into your own post, a quote or a DM draft.

Notes on @samo

Runs growth at a 20 person startup. Asked about pricing seats in March. Likes data.

Only you can see your notes.

Save this post

Try it.

You stay in control

Copilot helps you think and write. Every action on X is your own click.

You press send

Reply on X opens X's own reply window with your text filled in. You read it and press Reply yourself, then Mark as sent.

Never on its own

Copilot never posts, replies, likes, reposts, follows or bookmarks for you, and never scrolls or clicks on X by itself.

Follows X's rules

Sending from Kairo Post only works where X allows it, when the person mentioned you. Everything else goes through X's reply window.

No DMs read

Copilot never reads your direct messages. A DM draft is text you copy and send yourself.

Only the post you pick

It reads a post (and the thread above it) when you ask for help with it. Opening the quick reply card sends nothing.

Disconnect any time

Remove a browser in Settings → Copilot in Kairo Post, or remove the extension from Chrome.

Get started in a minute

Copilot works with your Kairo Post workspace, so you need a Kairo Post account with a plan or a trial.

01
Add to Chrome
From the Chrome Web Store. It works the same in Edge, Brave and Arc.
02
Pin it
Click the puzzle piece in your toolbar, then the pin next to Kairo Post Copilot.
03
Connect your workspace
Open its panel and press Connect. You approve it once in Kairo Post.
04
Open x.com
Click the Kairo button under any post, or press Alt+K for the side panel.

Add to Chrome

What it costs

Copilot is included in every plan. You only spend credits when AI writes for you or Kairo Post sends for you.

AI draftsCharged at what the AI really used, like all AI writing in Kairo Post. A typical draft costs 1 to 14 credits, depending on the model.
Reply on X, Put in reply box, CopyFree. You send with X's own window.
Reading the post, Scroll Radar, notes and savesFree.
Send now from Kairo Post3 credits, only where X allows it (the person mentioned you). The price is shown first.

Every rate is on the credits page.

Privacy in plain words

Copilot reads a post only when you ask for help with it. Scroll Radar scores posts inside your browser, and posts you don't open never leave your computer. X content is never used to train AI models, and uninstalling the extension deletes everything it stored on your device. Read the privacy policy.

What you get

Everything Copilot does today, in plain words.

The Kairo button on posts
Click it under any post, pick an angle like Agree and add or Ask a question, and get a reply in your Brand brain voice.
Your own words
Type a few words instead of picking an angle and Copilot polishes them into a reply.
Reply styles
Starter styles, plus your own, ready on every post.
Replies to your posts
Load the replies under your own post, get drafts for many at once and answer each one on X.
Scroll Radar
A small 🔥 marks fresh posts on your topics that still have room for a reply. The scoring runs in your browser.
You send it on X
Reply on X opens X's own reply window with the text filled in. Then Mark as sent keeps your list tidy.
Posts, quotes and DMs
Write your own post or a quote from any post, or draft a DM to its author to send yourself.
Save ideas
Save posts to your swipe file or Brand brain, and import the bookmarks shown on the page.
Private notes on people
Keep notes about the people you talk to. Only you see them.
Side panel
Open the bigger panel next to X with Alt+K or the toolbar icon, with chat and your settings.

Common questions

Which browsers does Copilot work in?

Desktop Chrome, Edge, Brave and Arc. Install it from the Chrome Web Store; Edge, Brave and Arc can add extensions from there too.

Does it work on my phone?

No. Browser extensions don't run in phone browsers. On your phone, use the Kairo Post app in your browser at app.kairopost.com.

Does Copilot post or reply for me?

No. It drafts, and you press send in X's own reply window. It never posts, likes, follows, reposts or replies by itself. Sending from Kairo Post only works where X allows it, when the person mentioned you, and only after you press Send now.

What does it read?

Only the post you ask for help with, and the posts above it in its thread. Scroll Radar scores posts inside your browser and sends nothing about posts you don't open. It never reads your DMs.

What does it cost?

Copilot is included in every plan. AI drafts use credits at what the AI really used, the same as all AI writing in Kairo Post. Opening X's reply window, reading the post and Scroll Radar are free.

How do I disconnect it?

In Kairo Post, open Settings → Copilot and disconnect the browser. You can also remove the extension from your browser at any time.

Is there a Firefox or Safari version?

Not yet. Copilot works in Chrome, Edge, Brave and Arc on desktop today.

Add to Chrome · free with every plan

Inbox & DM Concierge

Analytics & Rewards

Post at the right moment.
Starting today.

Connect an account, describe your voice and let Kairo Post do the legwork.

Get started See pricing

Kairo Post Copilot:your X co-writer,right inside x.com