The humanizer engine behind hundreds of products.
From the team behind Phrasly.ai. Industry-leading AI humanization and detection, delivered through two simple REST endpoints. No models to train, no GPUs to manage.
Output cross-checked against every major AI detector
Built by the Phrasly.ai team, as seen in
Built on Phrasly
When companies need humanization, they come to us.
Phrasly's engine already powers AI writing tools, paraphrasers, and humanizers across the industry. Plug the same engine into your product with one API call.
- The same models behind phrasly.ai, battle-tested at scale
- No Phrasly attribution or watermarks, so your users never know we're behind it
- From first prototype to millions of words per day
import axios from 'axios';
axios.post('https://business.phrasly.ai/api/v1/humanize', {
text: "AI-generated text to humanize..."
}, {
headers: {
'content-type': 'application/json',
'x-api-key': 'YOUR_API_KEY'
}
})
.then(res => console.log(res.data))
.catch(err => console.error(err));Create your API key
Create your account, subscribe, and grab your production key in minutes.
Call the endpoint
POST text to /humanize or /detect. That's the whole integration.
Ship your humanizer
Return natural, human-quality text under your own brand.
Two APIs, One Platform
Build with humanization and detection.
Two powerful endpoints to transform and analyze text. Easy to integrate, built for scale.
Transform AI text to human
Rewrite AI-generated content so it reads naturally. Built and tested to pass major AI detectors.
- Built to pass Turnitin, GPTZero, Copyleaks & more
- Preserves original meaning and tone
- Streaming support for real-time results
- 20-5,000 words per request
Detect AI-generated content
Analyze text to determine the likelihood it was AI-generated, with sentence-level confidence scoring.
- Sentence-level AI probability scoring
- Overall document confidence percentage
- Fast response times under 2 seconds
- Min 50 words, up to 15,000 characters per request
See It in Action
Quality you can show off.
The same engine, the same reports, the same benchmarks, inside your product.
Same meaning, human rhythm
The humanizer rewrites AI drafts so they read the way people actually write, while preserving the meaning and length of the original. No filler, no drift, no robotic cadence.
Sentence-level reports your users can act on
Every call to /v1/detect returns an overall AI probability plus a per-sentence breakdown, so your product can highlight exactly which lines read as AI-written and let users fix them in place.
Every release benchmarked before it ships
New model versions only go live after they clear our internal benchmark suite against Turnitin, GPTZero, Originality.ai, and Copyleaks. You get the improvements without lifting a finger.
Our Technology
Built for scale, priced to win.
Purpose-built models, optimized inference, and the lowest prices in the industry. We own the full stack, from models to infrastructure.
The Dashboard
Everything in one place.
Credits, keys, usage, and both playgrounds live in a clean dashboard your whole team can use.
Your balance and usage at a glance
See your credit balance, autopay status, and words processed per day the moment you sign in. No spreadsheet reconciliation, no surprises at the end of the month.
Keys, history, and playgrounds built in
Create and rotate API keys, browse your full request history, and test both endpoints right in the browser before you write a line of code.
Who Builds on Phrasly
One engine, hundreds of products.
From writing assistants to standalone humanizers, companies ship faster by letting Phrasly do the heavy lifting.
AI writing assistants
Add a humanize button to your editor. Drafts come back reading naturally, with the same meaning and a human tone.
Humanizers & paraphrasers
Launch a humanizer without training a single model. Many of the humanizers you've seen are already running on Phrasly under the hood.
Education & integrity platforms
Flag AI-generated submissions with sentence-level detection scoring, built into your existing review workflow.
Start in minutes · $100/mo includes $100 in credits
FAQ
Frequently asked questions
The Phrasly Business API provides two core services: AI Humanization (rewrite AI-generated text to read naturally and pass AI detectors) and AI Detection (analyze text to determine if it was AI-generated). It's the same engine that powers phrasly.ai, exposed as two simple REST endpoints.
Ready to power your humanizer?
Join the hundreds of companies building on Phrasly. Two endpoints, simple pricing, and an engine that just works.