About
Refrazr is a professional AI text humanization platform built by software engineers working closely with editors and linguists who specialize in natural language processing and AI detection patterns.
What we do
AI detectors — tools like GPTZero, Turnitin's AI indicator, Sapling, Originality.ai, and Copyleaks — don't look for plagiarism. They look for statistical patterns in how language models generate text. Those patterns are real and consistent: LLMs produce unnaturally uniform sentence lengths, overuse certain transition phrases, construct symmetrical parallel clauses, and favor a specific vocabulary set that signals machine authorship.
Refrazr addresses those patterns directly. Our humanization engine analyzes incoming text across eight scoring dimensions, identifies which AI fingerprints are present, and rewrites the text at the structural level — not just swapping synonyms. The result is content that reads like a person wrote it, because the patterns that detectors measure have been eliminated, not disguised.
We help content creators working with AI drafts, non-native English speakers who use AI to overcome language barriers, marketers producing content at scale, and anyone whose genuine writing has been incorrectly flagged by an AI detector. The free tier is permanently free — 500 words per day, no credit card required.
Our approach
Simple paraphrasers change what the text says. Refrazr changes how it was written. The LLM receives your text along with a pattern-by-pattern breakdown of what was detected and explicit instructions to break each structural fingerprint — not to "rewrite in your own words," but to fix the specific patterns that trigger detection.
The LLM rewrite is the first pass. After the model finishes, 60+ deterministic post-processing rules run: stripping AI vocabulary, enforcing sentence burstiness, breaking parallel structure, adjusting transition density. The probabilistic model catches big patterns; the rule layer handles the residue.
Our rules were developed through extensive analysis of 10,000+ AI-generated texts and testing against GPTZero, Turnitin, Originality.ai, Copyleaks, and Sapling. We don't optimize for a single detector — we target the underlying statistical patterns that all major detectors use.
We show you the AI score before and after humanization, with a breakdown of which patterns were detected and which were resolved. You shouldn't have to submit to an external detector to know if your text passes. The methodology is fully documented — see our methodology page.
Who built this
Refrazr is built by a software development team with 50+ engineers. The humanization engine was developed in collaboration with professional editors and linguists who work specifically in NLP and AI detection pattern analysis. The system is not the product of a single weekend hack — the prompt engineering, post-processing rules, and scoring dimensions represent months of iteration against real detectors with real test corpora.
We don't have a marketing page of stock photos and made-up names. The credibility of this product comes from how it performs on your text, which you can test right now for free.
Who uses it
AI drafts save hours of work, but raw AI output reads like AI output. Editors, readers, and Google's quality systems all notice. Refrazr converts AI-generated drafts into content that reads like it came from a skilled human writer — with natural rhythm, genuine variation, and no AI jargon.
Using AI to help express ideas in a second language is completely legitimate. Being flagged as an AI author for doing so is not fair. Refrazr helps non-native English speakers submit work that reflects their thinking without triggering false-positive detection.
Marketing teams using AI to scale content production need that content to rank, convert, and not get flagged. Refrazr runs at API scale — the Business plan includes API access for teams that need to process content programmatically.
AI detectors have real false-positive rates. Some human writers have writing styles that happen to trigger detection. Refrazr can analyze your text, identify which patterns are triggering the detector, and rewrite those specific sections — giving you clean output that no longer resembles the AI patterns it was falsely matching.
Privacy
We don't store your text. The process is: receive text → rewrite → return result → discard. Nothing you paste into Refrazr is logged to a database, shared with third parties, or used for model training. The only metadata we log is what's required for billing: timestamp, word count, and success/fail status.
Read the full details in our Privacy Policy. The short version: your content is yours and we never see it after the request completes.
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Free tier: 500 words/day, no account required.
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