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Fix AI writing so it sounds human.

Paste AI drafts, rewrite them naturally, and deliver content clients won't question.Free tier, no card required.

Start Free - 1,500 WordsSee Pricing

Your draft

Naturally yours

Your humanized text will appear here, natural, clear, and ready to deliver.

1,500
Free words every month
No card required
<3s
Per rewrite
Re-scores are instant
0-100
Human score on every output
See what is working

Watch your writing improve.

Each edit, each re-score brings you closer to content your clients won't question.

AI humanizes

62

First draft - still sounds like ChatGPT

You edit + re-score

78

AI patterns removed, sounds natural

Fork + humanize

91

Client-ready - passes any detector

Re-scoring is free. Iterate as many times as you want.

How it works

1

Paste your AI draft

Drop in any ChatGPT, Claude, or Gemini draft. One click to humanize.

2

AI humanizes it

Get a humanized version with a quality score (0-100). Good starting point, not the finish line.

3

Edit & re-score

Tweak sentences, hit Re-score. See the number climb. Free, unlimited, instant feedback.

4

Fork & compare

Branch into alternatives. Compare versions side by side. Pick the one that sounds most like you.

A workshop, not a slot machine.

Most humanizers give you one shot and hope for the best. Metric37 gives you a scoring loop so you can keep going until the writing is actually good.

Free unlimited re-scoring

Edit a sentence, re-score instantly. No cost, no limits. You see the number change and know what is working.

Version tree

Branch, compare, and navigate a tree of revisions. Each node has a score. See which edits improved the text.

Fork alternatives

Try a different direction from any version. Compare branches side by side. Pick the winner.

Word-level diff

See exactly what changed between any two versions. Word by word, no guessing.

API for your pipeline

One REST endpoint, API key auth. Send text, get back the rewrite. Fits anywhere.

Under 3 seconds

Fast enough to stay in your flow. Re-scores return in milliseconds.

Pay for words, not gimmicks.

Founding Member Pricing — 30% off for life for our first 100 subscribers

MonthlyAnnual
ONE-TIME
Word Packs

Buy once, never expires. No subscription needed.

$5

10K words

$19

50K words

$59

200K words

Buy Words
ENTERPRISE
Custom

For teams and agencies scaling content

2,000,000 words/moSSO (SAML/OIDC)Unlimited team membersDedicated support + SLAPriority API (200 req/hr)Custom processing profiles
Contact sales

Why we built this

Built because we needed it

We were using AI to draft client work. The drafts were fast but sounded like every other AI output on the internet. Clients noticed. Detectors flagged it. We tried paraphrasers, synonym swappers, prompt tricks. Nothing worked well enough.

So we built Metric37. Rewriting with a scoring loop, so you can actually see your text improve. It is the tool we wanted to exist.

Stop delivering AI drafts.
Deliver real writing.

1,500 words free. No credit card. Paste something and see.

Start Free - No Card Needed