Free / Open-sourceAI detection and writing verification built for schools and editors
Free / Open-sourceAI detection and writing verification built for schools and editors
HumanizeAI.pro records 9,652,312 monthly visits with +26% month-over-month growth and Free pricing. ProofUp records 0 monthly visits with -100% growth and Contact for Pricing pricing.

Verify income, identity, and documents before you hand over the keys
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | humanizeai.pro | proofup.com |
| Pricing Model | Free | Contact for Pricing |
| Monthly Visits | 9.65M (9,652,312) | 0 (0) |
| MoM Traffic Delta | +1.99M (+26%) | -1.73K (-100%) |
| Primary Market & Share | 🇺🇸 United States (36.5%) | 🌐 Global (—) |
| Direct Visits / mo | 3.85M | 0 |
| User Rating | 3.4 | 4 |
| Supported Platforms | Website | Website |

Free browser AI humanizer that rewrites AI text to read naturally
Paste AI-generated text, complete the captcha, and get a reworded, more natural-sounding version back in a single step.
You can use the humanizer directly in the browser without registering, signing in, or installing anything.
The rewrite is designed to retain the original meaning and SEO terms so you do not lose search relevance.
Alongside the humanizer, the site offers paraphrasing, plagiarism checking, grammar checking, and AI detector tools.

Verify income, identity, and documents before you hand over the keys
Applicants connect bank and payroll accounts through Plaid so earnings are read from the account itself, with no document in the path to forge. Uploaded documents are also analyzed for deposit frequency and real income.
A government ID photographed front and back is matched against a live selfie using facial recognition, catching borrowed identities before keys are handed over.
Uploaded PDFs are read at the byte level for hidden text layers, metadata mismatches, generator fingerprints, and post-generation edits — evidence that visual inspection misses.
Each application returns one of five verdicts (pass, pass with caution, non-recurring, needs review, fail) with a risk level and the specific signals that produced it.
Free / Open-sourceAI detection and writing verification built for schools and editors
Free / Open-sourceAI detection and writing verification built for schools and editors
Free / Open-sourceDetect, humanize and verify AI content in one place
Free / Open-sourceDetect, humanize and verify AI content in one place
Offers multi-engine humanization models and output variations, but interface can feel cluttered compared to HumanizeAI.pro.
Offers multi-engine humanization models and output variations, but interface can feel cluttered compared to HumanizeAI.pro.

Enterprise AI and plagiarism detection for content integrity
Delivers straightforward one-click text paraphrasing, but lacks advanced styling controls or API access.
Delivers straightforward one-click text paraphrasing, but lacks advanced styling controls or API access.

SpecialistSpecializes in rigorous AI content detection and plagiarism auditing rather than rewriting text itself.
SpecialistSpecializes in rigorous AI content detection and plagiarism auditing rather than rewriting text itself.
Includes built-in grammar checks and academic citation helpers, but restricted free usage limits.
Includes built-in grammar checks and academic citation helpers, but restricted free usage limits.
SpecialistCombines text humanization with thorough grammar and plagiarism analysis, but slightly more complex workflow.
SpecialistCombines text humanization with thorough grammar and plagiarism analysis, but slightly more complex workflow.

Offers convenient browser extension integration for rewriting on the fly, but limited custom tone adjustments.
Offers convenient browser extension integration for rewriting on the fly, but limited custom tone adjustments.

Free / Open-sourceDetect AI-generated text and images with benchmark-tested accuracy
Free / Open-sourceDetect AI-generated text and images with benchmark-tested accuracy
Tailored specifically for bypassing strict academic and enterprise detectors, but less polished general writing tools.
Tailored specifically for bypassing strict academic and enterprise detectors, but less polished general writing tools.

Simple web-based rewriter producing natural prose quickly, but lacks in-depth content analysis reports.
Simple web-based rewriter producing natural prose quickly, but lacks in-depth content analysis reports.