kitio.aiGPTZero vs OmniDetect
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. GPTZero starts at See pricing page and OmniDetect starts at $9.99 one-time. Check both pricing pages for current plans.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- AI probability score
- Sentence highlighting
- Writing replay in Google Docs
- Plagiarism checker
- API
- Passage-level AI scoring
- Fix guidance and re-check
- File and URL scanning
- Writer and text type settings
- Published accuracy data
| Feature | GPTZero | OmniDetect |
|---|---|---|
| Best for | AI detector that flags machine-written text for teachers and editors | AI text detector that flags passages and suggests what to fix |
| Category | Writing | Writing |
| Pricing model | Freemium | Freemium |
| Starting price | See pricing page | $9.99 one-time |
| Free plan | Yes | Yes |
| Made by | GPTZero | OmniDetect |
| Based in | United States | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
|
|
Pricing compared
GPTZero starts at See pricing page and OmniDetect starts at $9.99 one-time. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
2 plans
Free preview
Free
- Up to 10,000 characters accepted
- First 2,000 characters analyzed
7-Day Pass
$9.99 one-time
- Full checker report
- Passage-level fix guidance
- No auto-renewal
Prices in USD, checked Oct 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
GPTZero
- Free tier for regular checks
- Writing replay shows the drafting process
- LMS integrations
- Scores are probabilities, not proof
- Can misjudge non-native English writing
OmniDetect
- Shows evidence, not just a score
- No subscription or auto-renewal
- Free preview without signup
- Free preview reads only 2,000 characters
- Paid pass lasts only seven days
- Detection is never fully reliable
Which one should you choose?
Choose GPTZero if you want:
- Free tier for regular checks
- Writing replay shows the drafting process
- LMS integrations
Watch out: scores are probabilities, not proof.
Choose OmniDetect if you want:
- Shows evidence, not just a score
- No subscription or auto-renewal
- Free preview without signup
Watch out: free preview reads only 2,000 characters.
GPTZero vs OmniDetect FAQ
What is the difference between GPTZero and OmniDetect?
GPTZero: AI detector that flags machine-written text for teachers and editors. OmniDetect: AI text detector that flags passages and suggests what to fix. Both are writing tools.
Is GPTZero or OmniDetect cheaper?
GPTZero starts at See pricing page and OmniDetect starts at $9.99 one-time. Check both pricing pages for current plans.
Do GPTZero and OmniDetect have free plans?
GPTZero: Yes. OmniDetect: Yes.
Who makes GPTZero?
GPTZero is made by GPTZero, based in United States.
Who makes OmniDetect?
OmniDetect is made by OmniDetect.
Which should I choose, GPTZero or OmniDetect?
Choose GPTZero if you value free tier for regular checks and writing replay shows the drafting process. Choose OmniDetect if you value shows evidence, not just a score and no subscription or auto-renewal.