About Metric37
A humanizer that actually works, built by a team that needed one
Why this exists
We started Metric37 in 2025 because we were using AI to draft client work and the output kept getting flagged. Not by detectors, by clients. The writing was correct but lifeless. We tried every paraphraser and humanizer we could find. They all did the same thing: swap synonyms, shuffle words, hope for the best. The text still read like AI wrote it.
So we built something different. Metric37 rewrites your text, scores the result for naturalness, and retries if the score is too low. You can edit, re-score, compare versions, and keep going until the writing actually sounds like yours. It is the tool we wanted when we were handing in client work and hoping nobody would notice.
We are deliberately not a "bypass detection" tool. Gaming a specific detector is a short-term trick that breaks the next time the detector updates. Our goal is the durable version of the same outcome: writing that reads as genuinely human because it actually has the variation, rhythm, and voice that human writing has. When the writing is good, the detector question takes care of itself.
What Metric37 does
You paste an AI draft from ChatGPT, Claude, Gemini, or anywhere else. Metric37 rewrites it into natural prose and gives it a human score from 0 to 100 so you can see how it reads before you ship it. If a sentence still feels off, you edit it and re-score instantly, as many times as you want, for free. Every version is saved, so you can branch into alternatives, compare any two side by side with a word-level diff, and pick the one that sounds most like you.
The same humanization is available through a simple REST API, so teams can fold it into an existing publishing pipeline instead of copying text back and forth. There is also a free AI detector you can use without an account to check where a draft stands.
Who it is for
Metric37 is built for people whose reputation depends on what they publish: freelance writers delivering client work, content marketers producing at volume, agencies managing multiple brand voices, and solo creators writing newsletters, scripts, and posts. If you use AI to move faster on the first draft but you still want the final piece to sound like a person wrote it, that is exactly the gap this fills.
How we think about it
Iteration over magic
Good writing takes more than one pass. We give you a scoring loop so you can see what is working and what still needs fixing.
Your content stays yours
We encrypt everything, never train on your data, and you can delete anything at any time. Your words are not our product.
Made for people who ship words
Freelancers, agencies, content teams. If your reputation depends on what you publish, this is built for you.
How we handle your content
Your words are not our product. We do not train any models on the text you submit, and we do not sell or share it. Content is encrypted in transit and at rest, and you can delete a document or your whole account at any time. We keep a limited version history per document so you can roll back edits, and that history is yours to clear whenever you want. If you have specific data-handling or compliance questions, the security page goes into more detail and our team is happy to answer directly.
Get in touch
Metric37 is small and early-stage. If you have feedback, feature requests, or want to work together, we would genuinely like to hear from you. We read every message and we reply.
Email [email protected] or find us on Twitter.