Suggestions appear as you type. Use the up and down arrows to choose one and Enter to open it.

This page's audience our own tag's counts — open to see them
–Visits
–Page views
–Clicks to vendors
–Time on page
–Reading now
Clicks to vendors, by tool
  • –
Top countries
  • –
Devices
  • –

– · visits, page views and clicks counted by our own tag, which counts more than our checked analytics; every figure rounded down · how we count

Head-to-head · AI Content Detection Software

GPTZero vs Undetectable AI

  • Updated Oct 2026
  • Both researched from official sources
  • 5 checks side by side
Higher score GPTZero #1 in AI Content Detection Software 9.3/10 Free plan · 14-day trial Free planFree trial✓ 3 of 4 features Visit GPTZero
Undetectable AI #2 in AI Content Detection Software 9.1/10 Free plan Free plan✓ 4 of 4 features Try Undetectable AI

GPTZero leads on 0 checks, Undetectable AI on 0, and 5 are even. Who comes out ahead on the 5 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreGPTZero · 9.3/10
  • Free planboth
  • Free trialonly GPTZero
  • Most featuresUndetectable AI · 4 of 4

GPTZero scores higher on our rubric for ai content detection software: 9.3 against 9.1 out of 10; our editors rank them #1 and #2.

GPTZero is the better fit for education-focused text verification. Undetectable AI is the better fit for content teams using many integrations.

  • GPTZero fits best

    Education-focused text verification

  • Undetectable AI fits best

    Content teams using many integrations

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature GPTZero 9.3/10 Visit ↗ Undetectable AI 9.1/10 Visit ↗
At a glance
Editor score 9.3 9.1
Ranking #1 in AI Content Detection Software #2 in AI Content Detection Software
Best for Education-focused text verification Content teams using many integrations
Pricing model Free plan + paid Free plan + paid
Starting price Free plan · 14-day trial $9.99/mo
Free plan ✓ ✓
Free trial 14 days —
Deployment Cloud, Browser extension Cloud, Browser extension
Platforms Web, Chrome extension Web, Chrome extension
Integrations 5 integrations 11 integrations
Features GPTZero 3/4 · Undetectable AI 4/4
File uploads Not checked yet ✓ (best)
API access ✓ ✓
Browser extension ✓ ✓
Batch scanning ✓ ✓
Specs
Supported languages Not checked yet Not checked yet
Report exports Not checked yet Not checked yet
Our review
Pros
  • Sentence-level highlighting supports more detailed document review.
  • Education integrations include Google Classroom, Canvas, and Moodle.
  • Batch scanning, reports, Chrome extension, and API support larger workflows.
  • Detects text from ChatGPT, GPT-4, GPT-5, Claude, Gemini, DeepSeek, and Llama
  • Supports multilingual detection, bulk scanning, files, URLs, and PDFs through the API
  • Connects with Google Docs, WordPress, Notion, Gmail, LinkedIn, and more
Cons
  • Detection coverage is specified across five languages.
  • Paid pricing uses an interactive calculator or account flow.
  • GPTZero is not open source.
  • Paid plans limit monthly usage by word allowance
  • The feature set may be broader than needed for simple one-off checks
  • The Chrome extension and API add workflow options that may require configuration
Our verdict

GPTZero is an AI content detection service for educators, students, writers, publishers, recruiters, and businesses. It identifies AI-generated text across major language models, providing document-level results with sentence-level…

Read the review →

Undetectable AI is a web-based platform for assessing whether text is likely AI-generated. It is designed for students, educators, writers, marketers, researchers, and businesses that need to review pasted text, uploaded files, documents,…

Read the review →
  1. GPTZeroAI Content Detection Software 9.3Free plan · 14-day trial
  2. Undetectable AIAI Content Detection Software 9.1Free plan

Strengths and trade-offs

  • GPTZero — where it wins

    • Sentence-level highlighting supports more detailed document review.
    • Education integrations include Google Classroom, Canvas, and Moodle.
    • Batch scanning, reports, Chrome extension, and API support larger workflows.

    Where it doesn't

    • Detection coverage is specified across five languages.
    • Paid pricing uses an interactive calculator or account flow.
    • GPTZero is not open source.

  • Undetectable AI — where it wins

    • Detects text from ChatGPT, GPT-4, GPT-5, Claude, Gemini, DeepSeek, and Llama
    • Supports multilingual detection, bulk scanning, files, URLs, and PDFs through the API
    • Connects with Google Docs, WordPress, Notion, Gmail, LinkedIn, and more

    Where it doesn't

    • Paid plans limit monthly usage by word allowance
    • The feature set may be broader than needed for simple one-off checks
    • The Chrome extension and API add workflow options that may require configuration
  • GPTZero9.3/10 · Free plan · 14-day trial

    GPTZero combines document, sentence, paraphrase, and workflow verification tools.

    Visit GPTZeroFull verdict →
  • Undetectable AI9.1/10 · Free plan

    Multilingual AI detection with bulk scanning, browser tools, API access, and broad integrations.

    Try Undetectable AIFull verdict →

More comparisons

All AI content detection software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update