Voice engine by 100x

An AI that writes exactly like you.

It learns your voice from your own writing, then drafts your emails, texts, and posts so they sound like you and never like a robot. You read it and hit send.

This is Nikolai, the voice Nik Shah built for himself at 100x.

N
Nikolai
drafting in your voice
Task: cold email to a fund partner
See the difference

Same request. One reads like a bot. One reads like you.

Type a rough brief into any AI and you get the left. Nikolai gives you the right. Watch both write it out.

Generic AI
Nikolai, in your voice

The tell: a stack of fragments with periods dropped between them. People talk in full sentences. So does Nikolai.

How it works

Four layers turn a rough thought into your voice.

Most AI voice is one line in a prompt. Nikolai runs every draft down four layers. Watch a message move through them.

↑ your rough thought goes in
01

The floor

Strips the robot out. No stock phrases, no fragments dressed up as sentences.

36 rules
02

The masters

Moves from the best communicators alive. Voss on a negotiation, Ogilvy on a line.

12 masters
03

The playbooks

Picks the right approach for a text, an email, a call, or a deck.

5 playbooks
04

The skills

Runs the whole task, trained on eighty of your real messages.

80+ samples
A draft that sounds like you. Ready in seconds. You hit send.
The depth

Four crafts behind every line. Not one prompt.

Sounding human is only the floor. On top sit three crafts most tools never touch.

0
Voice rules
Kill every robot tell, then bend by channel.
0
Masters, on call
Negotiation, copy, and long-form, made usable.
0
Copy examples
Sorted into 28 rules that make copy sell.
0
Design traps avoided
So the work looks right the moment it lands.
Why it compounds

Every edit makes it sharper.

Fix a line once and it never gets that wrong again. The more you use it, the less you touch it.

The loop
Runs daily
You edit It learns Drafts improve You edit less
1You fix a line. Trim it, reshape it, swap a word.
2It reads the change and turns it into a rule, that day.
3The next draft is closer. The same fix never comes back.
4Weeks in, you barely edit. It just sounds like you.
Build your own

Want your own voice? Start today.

You do not need to be technical. If you can write an email, you can do this. Five steps, about ten hours over a few weeks.

✓ No code. Nothing to install to try it.
01

Gather how you already sound

Copy twenty or thirty things you have written. Real emails, a few texts, a couple of posts. You already have all of it.

about 30 minutes
02

Write down your rules

The words you would never use. How you open and close. One page is plenty. This becomes your floor.

about an hour
03

Pick who you learn from

Name two or three communicators you admire. Your voice gets to stand on the best of them.

about 30 minutes
04

Set the one guardrail

Decide what it can draft alone and what must never send without you. Anything you cannot take back waits for your eyes.

about 20 minutes
05

Put it to work, then correct it

Drop your writing and rules into a Claude project and ask it to draft in your voice. Fix its lines, tell it what changed. In a few weeks it stops needing the fix.

a little every day
Paste this into Claude to begin
You are my writing voice.

I'll paste twenty things I've actually written, plus a page of
my rules: my openers, my closers, the words I never use, and
how I sound on email versus a quick text.

Learn all of it. From now on, when I ask, draft in my voice
and give me two options. Never send anything on your own.

When I edit your draft, ask me what changed, and remember it
for next time.

Would rather not do it alone? Two ways Nik can help.

The point

Give your voice a system.

Anyone can ask a model to write like them and get an impression. This is the real thing, and you can start it tonight.

Built by
Nik Shah, founder of 100x
"If AI can write in my voice, it can write in yours."

100x builds AI agents for businesses. Nikolai drafts Nik's outbound all day. He still reads every word before it sends.