penn AI replies that sound like you
Chrome extension for X

Sound like you, not like a model.

penn AI lives beside the X composer. It reads the post you're replying to, knows your voice, your products, and your guardrails, then drafts replies a real person would actually type. You edit and post by hand — it never auto-posts.

builders replying in their own voice 5 free drafts / day
x.com/compose/reply
Dana Okafor
@danabuilds
shipping is easy, the hard part is getting anyone to care. how are you all finding your first 100 users?
penn AI reading thread · your voice

honestly? i replied to ~30 posts a day from people in the exact spot my tool fixes. no pitch, just useful answers. first 100 came from there before i wrote a single ad.

InsertCopyRefine

the "getting anyone to care" part never really ends lol. what worked for me was picking one tiny audience and being weirdly present in their replies for a month.

InsertCopyRefine

what it does

Context in, you out.

It isn't a generic generator bolted onto a prompt box. penn AI reads the actual conversation and writes from who you actually are.

Reads the whole thread

Pulls the post you're replying to, the thread above it, and any images in it — so the draft answers what was really said.

Trained on your voice

Your bio, your products, your forbidden phrases and anti-examples shape every line. Drafts read like your timeline, not a press release.

Anti-slop on every draft

A filter strips the giveaways — em dashes, hype words, engagement bait — before a single draft ever reaches you.

Write original posts

On Pro, compose posts grounded in your live home feed and the conversations happening right now, not last year.

Promote without the cringe

Mention your product the way a builder would in a real reply — helpful first, never a copy-paste ad.

Private by design

Human-in-the-loop, no auto-posting, no scraping. Your profile stays in your browser; we never store request content.

how it stays human

If it sounds like a model, you never see it.

Every draft runs through a filter that bans the tells people clock instantly. These never make it out of the panel:

"it's not X, it's Y" em dashes rule-of-three lists "unlock / elevate / supercharge" "in today's fast-paced world" engagement bait "great question!" hashtag spam

pricing

Start free. Grow on Pro.

No card to try it. Upgrade when replies turn into reach.

Free

$0 / forever

  • 5 AI reply generations a day
  • Your voice, products, and guardrails
  • Anti-AI-slop filter on every draft
  • Reads images in the post

Add to Chrome

Pro

$9 / month · $79 / year

  • 400 generations a day, best model (gpt-5.4)
  • Write original posts grounded in your live feed
  • Promote your products like a builder, never an ad
  • Web search for posts about current events
  • Draft refinement chat

Go Pro

ready when you are

Replies are the front door.
Walk through as yourself.

Add penn AI, set your voice once, and start drafting replies that sound like you in seconds.

Add to Chrome — it's free

human-in-the-loop · no auto-posting · no scraping