Widely used for quick AI text detection, but less comprehensive for enterprise plagiarism and code auditing.
Widely used for quick AI text detection, but less comprehensive for enterprise plagiarism and code auditing.
Copyleaks records 2,402,494 monthly visits with -14.1% month-over-month growth and Paid, Contact for Pricing 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 | copyleaks.com | proofup.com |
| Pricing Model | Paid, Contact for Pricing | Contact for Pricing |
| Monthly Visits | 2.4M (2,402,494) | 0 (0) |
| MoM Traffic Delta | -394.39K (-14.1%) | -1.73K (-100%) |
| Primary Market & Share | 🇺🇸 United States (53.2%) | 🌐 Global (—) |
| Direct Visits / mo | 758.5K | 0 |
| User Rating | 4.4 | 4 |
| Supported Platforms | Website | Website |

Enterprise AI and plagiarism detection for content integrity
Identifies AI-generated text across 30+ languages and leading LLMs, with reported accuracy above 99% on internal English test sets.
Searches 60 trillion websites, 16,000+ open-access journals and internal repositories to catch paraphrasing and hidden copying.
Extends detection to AI-generated video, audio and images so teams can verify content beyond text alone.
A scalable API and workflow integrations automate content analysis inside LMS platforms, publishing tools and enterprise systems.

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.
Widely used for quick AI text detection, but less comprehensive for enterprise plagiarism and code auditing.
Widely used for quick AI text detection, but less comprehensive for enterprise plagiarism and code auditing.
Free / Open-sourceAI detection and writing verification built for schools and editors
Free / Open-sourceAI detection and writing verification built for schools and editors

SpecialistIncludes expert human proofreading alongside plagiarism checks, but lacks native automated AI content detection.
SpecialistIncludes expert human proofreading alongside plagiarism checks, but lacks native automated AI content detection.
Free / Open-sourceDetect, humanize and verify AI content in one place
Free / Open-sourceDetect, humanize and verify AI content in one place

Offers robust combined AI detection and plagiarism checking, but lacks Copyleaks' extensive enterprise API ecosystem.
Offers robust combined AI detection and plagiarism checking, but lacks Copyleaks' extensive enterprise API ecosystem.

Features detailed sentence-level analysis for multilingual text, but lacks Copyleaks' broad enterprise feature set.
Features detailed sentence-level analysis for multilingual text, but lacks Copyleaks' broad enterprise feature set.

Free / Open-sourceDetect AI-generated text and images with benchmark-tested accuracy
Free / Open-sourceDetect AI-generated text and images with benchmark-tested accuracy

Accuracy-first plagiarism and AI detection for schools, universities, and teams
Accuracy-first plagiarism and AI detection for schools, universities, and teams

Check plagiarism, detect AI text and polish your writing in one place
Check plagiarism, detect AI text and polish your writing in one place

AI-powered ID scanning, authentication and identity proofing
AI-powered ID scanning, authentication and identity proofing

Biometric identity verification and AI-powered remote exam proctoring
Biometric identity verification and AI-powered remote exam proctoring

Liveness and deepfake detection for identity verification