Hypepen: writes your X (Twitter) posts with AI

Hey Product Hunt 👋

I'm Benjamin, and I built Hypepen because growing on X felt like a second job: staring at a blank composer, guessing what the algorithm wants, posting at random times.

So I made the tool I wanted, and I've been using it every single day on my own account (@mazaki_eth) to fine-tune every detail before anyone else touches it. Real numbers from my dashboard:

• Followers: 732 to 1,639

• Average impressions per post: ~2,300 to 61,915 (27×)

• All of it in less than two weeks after switching Hypepen on

Every account is different, so that's not a promise. It's just what happened when I stopped guessing.

What Hypepen does

• Reads your last 100 posts and learns your voice: your tone, your habits, your words

• Prepares tomorrow's posts every evening. You swipe to approve, skip or edit

• Writes from what actually makes people follow you: your best pillars, formats and hooks, measured on your own stats

• Picks between a single post and a thread depending on how rich the topic is and how your threads perform

• Schedules at your best times, sorts your mentions and pre-fills replies

No guesswork, no myths. The writing rules come straight from X's open-source ranking code: what it rewards (replies, shares, follows, time spent reading) and what it punishes (engagement bait, generic "AI slop", link spam). I re-read it every time X ships an update. The latest one, from October, rewards posts that people read all the way to the end, so that's built in too.

And nothing goes out without you: every post is approved by you first.