CortXChrome Extension for ๐•

Turn every reply thread
into followers.

The small-account strategy, automated. Spot low-follower users in any thread, follow them in one click, reply with AI โ€” and watch them visit your profile wondering "who is this person?"

Free forever โ€” no card neededPro: 500 AI replies/day ยท $9/moLives inside ๐•Nothing auto-sends
x.com
Post
IG
Indie Growth@indiegrowthยท1h

The fastest way to grow on ๐• is to find where your audience already hangs out and follow them first.

AB
Alex Builds@alex_builds842
Replying to @indiegrowth

Same! I've been doing this manually for months โ€” there has to be a better way.

238
Y
Post your reply

Why this works.

Big accounts ignore you. Small accounts don't. When you follow and reply to someone with 80 followers, they notice. They check your profile. They follow back. They engage with your content. CortX makes this strategy effortless.

1
Spot

Badges reveal follower counts inline โ€” find small accounts instantly.

2
Follow + Reply

One click to follow. AI drafts a reply. They get two notifications.

3
Get noticed

"Who is this?" โ†’ profile visit โ†’ follow back โ†’ engagement.

Step 1

Spot your best targets โ€” without leaving the thread.

Color-coded badges appear next to every username on ๐•. Instantly see who has a small, active following โ€” the people most likely to check you out when you follow them.

842
Under 1Kโ€” Your highest-value targets โ€” most likely to follow back
3.2K
1K โ€“ 10Kโ€” Growing creators โ€” good follow-back rate
47K
10K โ€“ 100Kโ€” Established voices โ€” worth engaging, rarely follow back
312K
100K+โ€” Major influencers โ€” engage for visibility, not follows
Step 2

Follow 50 people in the time it used to take for 5.

Click any badge to follow instantly โ€” no profile visit, no new tab, no losing your scroll position. Each follow sends them a notification, and that's your first touchpoint.

1 click
To follow anyone
0 tabs
Zero context switching
30 seconds
To work an entire thread
Real-time rate limit tracking
Your credentials never leave your browser
Step 3

Second touchpoint: a reply that sounds like you.

A follow gets their attention. A smart reply gets their curiosity. Hit โœจ next to any reply box โ€” CortX drafts a contextual reply matching your tone. Review it, tweak it, send it. Nothing ever auto-sends โ€” you stay in control.

AI Reply
"This is exactly the problem I'm solving with my app โ€” targeting the right people is everything. Would love your take on it!"

Built for people who ship.

You're building something and using ๐• to find your audience. Here's what that looks like with CortX.

Indie hacker launching a SaaS

You find a viral post about a problem your product solves. 200 replies. You open the thread, spot 40 accounts under 2K followers talking about the pain point, follow them all, and reply to 15 with a tailored comment mentioning your product.

By tomorrow: 25 follow-backs, 8 profile visits, 2 DMs asking about your product.
Dev building in public

You post a build update. Nobody sees it because you have 300 followers. So you go to threads by bigger accounts in your niche, follow the small accounts replying there, and engage with their takes.

In a week: your follower count doubles. Your next build update gets 10x the reach.

The old way vs. the CortX way.

โœ•Without CortX

  • โœ•Open each profile to check their follower count
  • โœ•No idea who will actually follow back
  • โœ•Write every reply from scratch
  • โœ•Risk getting rate-limited without warning
  • โœ•25+ min of clicking per thread โ€” for maybe 3 follows

With CortX

  • See follower counts inline โ€” target small accounts
  • Follow + reply without leaving the thread
  • AI drafts replies โ€” you review before sending
  • Rate-limit tracking so you never get blocked
  • Work 50 accounts in the time it took for 5

Questions? Answered.

Yes โ€” follower badges, one-click follow, rate limit tracking, and 10 AI reply generations per day are completely free. The Pro plan ($9/mo) bumps AI generation to 500 per day.
Absolutely. The extension tracks your follow and user-lookup rate limits in real time with live countdown timers, so you always know exactly how many actions you have left.
Your X credentials never leave your browser. The extension uses your active session cookie โ€” it never asks for your password. The only external call is to a Cloudflare Worker for AI text generation, which doesn't receive any X credentials.
CortX uses the same APIs that X's own web app uses โ€” it doesn't scrape or use unofficial endpoints. That said, X imposes rate limits that we monitor in the extension.
Never. CortX generates reply drafts that you review and send yourself. Follows only happen when you click the button. Nothing is ever automated behind your back โ€” your account, your control.
Currently Chrome and any Chromium-based browser (Edge, Brave, Arc, etc.). Firefox support is planned.
When you click the sparkle button next to any reply box, the extension sends the post context to a secure Cloudflare Worker that calls a LLM provider API. You can set a pre-prompt (e.g., your product pitch) and a tone (casual to formal), and the AI generates a reply under 280 characters โ€” contextual, on-brand, and engagement-optimized.

Your next 1,000 followers are in reply threads.

Install CortX in 10 seconds. Lives inside ๐• โ€” nothing auto-sends, you keep full control.