Side-by-side comparison · Writing & Translation

Copyleaks vs GPTZero

Everything that matters when choosing between them, in one place: our rating, what each can do, what they cost, and the trade-offs.

Copyleaks

3.9

From $0

Details Visit

Best overall

GPTZero

4.2

From $0

Details Visit

Comparing 2 tools. Add one more if you like.

At a glance

Copyleaks3.9

Pick it if: Schools, publishers and businesses that need AI and plagiarism checks together, especially across several languages.

GPTZero4.2

Best overallBest valueEasiest to use

Pick it if: Teachers, editors and business owners who want a second opinion on whether writing they've been handed came from AI.

Overview

Attribute	Copyleaks	GPTZero
In one line	Checks text for AI writing and plagiarism in one scan, in over 30 languages.	Checks whether text was written by AI, with plagiarism and citation checks too.
Pricing model	Freemium	Freemium
Starting price	$0	$0
Free plan	Yes	Yes
Works with Claude Code	Yes	Yes

Rating breakdown

Our scores out of 5. The higher bar in each row is highlighted.

Attribute	Copyleaks	GPTZero
Overall rating	3.9	4.2Winner
Ease of useHow quickly someone non-technical gets value from it.	4.0	4.5
FeaturesHow completely it covers its own job, and how well the pieces fit together.	4.5	4.5
Output qualityHow good the results are before you fix them.	3.5	3.5
Value for moneyWhat you get for the price, including the free plan.	3.5	4.0
Speed & reliabilityHow fast it is and how often it falls over.	4.0	4.5

Feature comparison

A tick means it does this today. A dash means we haven't checked.

Attribute	Copyleaks	GPTZero
Access & platform
Free plan	Yes	Yes
Mobile app	No	No
Desktop app	–	–
Browser extension	Yes	Yes
API access	Yes	Yes
Teams & business
Team workspace	Yes	Yes
Enterprise plan or SSO	Yes	Yes
Connects to other apps	Yes	Yes
Open source or self-hosted	Yes	No
AI abilities
Works with your files	Yes	Yes
Understands images	Yes	–
Makes images	No	No
Makes video	No	No
Writes code	No	No
Runs agents or automations	No	No
Learns your brand or style	–	–
Works in many languages	Yes	Yes
Capabilities score	10/ 17	8/ 17

Pricing

Plans as listed on each vendor's site when we last checked. Confirm before you buy.

Attribute	Copyleaks	GPTZero
Plans	Free $0 Quick one-off checks.	Free $0 Checking the odd document.
	PersonalOur pick $16.99/mo, or $13.99/mo billed yearly Individuals checking work regularly.	PremiumOur pick $23.99/mo, or $12.99/mo billed yearly Teachers and editors checking work every week.
	Pro $99.99/mo, or $74.99/mo billed yearly Teams and agencies.	Professional $45.99/mo, or $24.99/mo billed yearly Agencies and heavy users scanning lots of files.
	Enterprise and Education Custom Companies and schools at scale.	Team Professional price per seat, 2 seats minimum Schools and businesses buying for a group.
Which plan to pick	Try the free checker first. Personal covers about 100 pages a month, which suits most individuals. Only move to Pro if a team needs seats or you want website scans. One credit covers 250 words or one image.	Start on Free. If you check more than a few documents a week, Premium on yearly billing is the sweet spot. Professional only makes sense if you scan big batches of files.

Key features

Attribute	Copyleaks	GPTZero
Standout features	AI and plagiarism in one report Many languages AI image detection Website scans Works where you are API and school integrations	AI detection Plagiarism check Writing replay Citation and hallucination check Batch scans API and school integrations

Pros and cons

Attribute	Copyleaks	GPTZero
Pros	AI and plagiarism checks in one report Best multilingual coverage of the major detectors Catches plagiarism translated from another language MCP access lets you scan from Claude Checks images as well as text	Clear sentence-level highlights, so you see exactly what looks AI-written Generous free plan for occasional checks Writing replay gives honest writers a way to prove their work Flags made-up citations, which most detectors don't API and batch scans for larger volumes
Cons	Like all detectors, it can flag human writing Personal plan's word allowance is small Big jump in price from Personal to Pro Switching plans wipes unused credits, and refunds are strict Overlaps almost completely with Originality.ai	False positives happen, and short or formal writing gets flagged more often Edited or reworded AI text can get past it The best scan and plagiarism checks need a paid plan Mostly designed around schools, so some features won't matter to a business

Who each one is for

Attribute	Copyleaks	GPTZero
Best for	AI and plagiarism checks in one report Checking content in languages other than English Scanning a whole website for copied pages Checking images for AI	Checking essays and assignments for AI writing Screening freelance or agency content Spotting made-up citations in reports Showing you wrote a document yourself
You'll find it used by	Schools and universities Publishers Content agencies Compliance teams Students	Teachers Editors Content agencies Recruiters Students

Questions people ask

Which is better, Copyleaks or GPTZero?

GPTZero scores highest overall in our ratings (Copyleaks 3.9/5 and GPTZero 4.2/5). Copyleaks is best for AI and plagiarism checks in one report and checking content in languages other than English. GPTZero is best for checking essays and assignments for AI writing and screening freelance or agency content.

Which is cheaper, Copyleaks or GPTZero?

Copyleaks: There's a free plan, and paid plans start at $0. GPTZero: There's a free plan, and paid plans start at $0.

Which is easier to use, Copyleaks or GPTZero?

GPTZero rates highest for ease of use in our scores. Teachers, editors and business owners who want a second opinion on whether writing they've been handed came from AI.

Ratings are our own, from using each tool, across ease of use, features, output quality, value for money, speed & reliability.

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