Side-by-side comparison · Writing & Translation

GPTZero vs Originality.ai

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

Best overall

GPTZero

4.2

From $0

Details Visit

Originality.ai

4.1

From $14.95/mo

Details Visit

Comparing 2 tools. Add one more if you like.

At a glance

GPTZero4.2

Best overallEasiest 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.

Originality.ai4.1

Pick it if: Publishers, content agencies, SEO teams and businesses that commission written content and want to check it before publishing.

Overview

Attribute	GPTZero	Originality.ai
In one line	Checks whether text was written by AI, with plagiarism and citation checks too.	Checks content for AI writing, plagiarism and factual errors before you publish it.
Pricing model	Freemium	Freemium
Starting price	$0	$14.95/mo
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	GPTZero	Originality.ai
Overall rating	4.2Winner	4.1
Ease of useHow quickly someone non-technical gets value from it.	4.5	4.0
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.	4.0	4.0
Speed & reliabilityHow fast it is and how often it falls over.	4.5	4.5

Feature comparison

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

Attribute	GPTZero	Originality.ai
Access & platform
Free plan	Yes	Yes
Mobile app	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	No	No
AI abilities
Works with your files	Yes	Yes
Understands images	–	–
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	–
Capabilities score	8/ 17	7/ 17

Pricing

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

Attribute	GPTZero	Originality.ai
Plans	Free $0 Checking the odd document.	Free Free Checking the odd article.
	PremiumOur pick $23.99/mo, or $12.99/mo billed yearly Teachers and editors checking work every week.	ProOur pick $14.95/mo, or $12.95/mo billed yearly Agencies and site owners checking content every week.
	Professional $45.99/mo, or $24.99/mo billed yearly Agencies and heavy users scanning lots of files.	Enterprise $179/mo, or $136.58/mo billed yearly Publishers and large content teams.
	Team Professional price per seat, 2 seats minimum Schools and businesses buying for a group.
Which plan to pick	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.	Pro is enough for most agencies and site owners. An AI and plagiarism check together uses two credits per 100 words, so budget about 100,000 words of checked content a month. Go Enterprise only if you need the API or very high volume.

Key features

Attribute	GPTZero	Originality.ai
Standout features	AI detection Plagiarism check Writing replay Citation and hallucination check Batch scans API and school integrations	AI detection Plagiarism checker Fact checker Bulk and site scans Writing replay API

Pros and cons

Attribute	GPTZero	Originality.ai
Pros	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	AI, plagiarism, facts and readability in one scan Cheap for the volume on Pro Bulk and whole-site scanning Writing replay gives honest writers a way to prove their work API for content teams
Cons	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	False positives are a recurring complaint, and independent tests find more than the vendor claims Monthly credits expire if you don't use them API is only on the expensive Enterprise plan A score can sour a client or writer relationship if treated as proof

Who each one is for

Attribute	GPTZero	Originality.ai
Best for	Checking essays and assignments for AI writing Screening freelance or agency content Spotting made-up citations in reports Showing you wrote a document yourself	Checking freelance and agency content AI and plagiarism checks in one scan Fact-checking articles before they go live Bulk scanning a website Proving a writer wrote their own draft
You'll find it used by	Teachers Editors Content agencies Recruiters Students	Content agencies Publishers SEO teams Marketing managers Website buyers

Questions people ask

Which is better, GPTZero or Originality.ai?

GPTZero scores highest overall in our ratings (GPTZero 4.2/5 and Originality.ai 4.1/5). GPTZero is best for checking essays and assignments for AI writing and screening freelance or agency content. Originality.ai is best for checking freelance and agency content and AI and plagiarism checks in one scan.

Which is cheaper, GPTZero or Originality.ai?

GPTZero: There's a free plan, and paid plans start at $0. Originality.ai: There's a free plan, and paid plans start at $14.95/mo.

Which is easier to use, GPTZero or Originality.ai?

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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