AI Content Detector
AI Content Detector
Instantly analyze any text to determine if it was written by AI or a human.
Select Available Detectors
Run connected checks now; more detector APIs are pending
Run the detector check before your text gets judged

Detect, then rewrite — in one workflow
ProofWrite combines detection and humanization in a single workflow. Find the risky passages, send them to the humanizer, and verify the new version — all without switching tabs or copying text between tools.
ProofWrite Detector Advantages
Detection is most useful when it is connected to the rewrite workflow.
Detector-Oriented Review
Understand the risk signals your text may create across common AI detection workflows.
Sentence-Level Analysis
See exactly which sentences appear AI-generated and which read as human-written.
Built-in Humanizer
Found risky passages? Send them into the humanizer and compare the revised version.
Results stay in the workflow
Use the detector result to decide the next edit instead of treating it as a dead-end score.
AI Detectors Give Different Results — Here's Why
Detector disagreement is normal. Different tools weigh cadence, predictability, sentence length, and model fingerprints differently, so ProofWrite focuses on practical risk reduction instead of a single magic number.
Different scoring models
One detector may punish predictable word choice while another focuses on sentence structure or perplexity.
Different text lengths
Short snippets create weak signals. Longer passages usually give detectors more context and more confidence.
Different use cases
Different detectors use different thresholds, training data, and score calibration, so the same paragraph can receive different labels.

Why multi-detector matters
Different detectors weigh different signals. A text that passes one tool may fail another. ProofWrite cross-references multiple detection services so you see the full risk picture before submitting, publishing, or sending.
Use the detector to make a decision, not just read a number
A useful AI detector should reduce uncertainty. These are the moments where ProofWrite helps most.
Before submitting
Check an assignment, cover letter, or application draft before it reaches a reviewer.
Before publishing
Review blog posts, product pages, and newsletters so the copy reads edited, not generated.
Before sending important text
Check the final version in the same place you revise it, instead of copying it through several detector tabs.
Choose Your Plan
Start free with 250 words. Upgrade for higher limits and advanced features.
Standard
- 20,000 words/month
- All credits available on day one
- 8 rewrite modes
- Humanize 750 words/request
- 30 free ProofDetect scans/day
- All languages
- 50 Credit/month AI Detector
Pro
SAVE 57%- 60,000 words/month
- All credits available on day one
- 8 rewrite modes + new models
- Humanize 1,500 words/request
- Unlimited ProofDetect scans
- All languages
- 100 Credit/month AI Detector
Ultra
- Unlimited rewrite words
- All credits available on day one
- 8 rewrite modes + new models
- Humanize 3,000 words/request
- Unlimited ProofDetect scans
- All languages
- 200 Credit/month AI Detector
Frequently Asked Questions
Ready to Improve Your Writing Quality?
Use ProofWrite to detect risky passages, humanize them, and compare the new version in the same workflow.
