kitio.aiZeroGPT vs Isgen
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. ZeroGPT starts at See pricing page and Isgen starts at See pricing page. 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 text detection
- Sentence highlighting
- PDF detection reports
- Batch file upload
- Plagiarism checker
- Developer API
- Sentence-level AI detection
- Plagiarism checker
- Bulk file scanning
- Grammar checker
- AI humanizer
- Presentation maker
| Feature | ZeroGPT | Isgen |
|---|---|---|
| Best for | AI text detector with a humanizer, plagiarism checker and writing tools | AI detector with plagiarism checking, humanizer and slide maker |
| Category | Writing | Writing |
| Pricing model | Freemium | Freemium |
| Starting price | See pricing page | See pricing page |
| Free plan | Yes | Yes |
| Made by | ZeroGPT | Isgen |
| Based in | – | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Both offer: Plagiarism checker.
Pricing compared
ZeroGPT starts at See pricing page and Isgen starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
4 plans
Free
Free
- Up to 5,000 characters per check
- Basic AI detection
Academic
$8/mo billed yearly
- 350,000 detection words a month
- Premium plagiarism checker
- Batch file upload
Writing
$15/mo billed yearly
- 50,000 humanizer words a month
- AI proofreader
- 4,000 presentation credits
Ultimate
$24/mo billed yearly
- Unlimited words
- Humanizer and proofreader
- 8,000 presentation credits
- Priority support
Prices in USD, checked Nov 5, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
ZeroGPT
- Free detector with no sign-up needed
- Shows which sentences look AI-written
- Many writing tools under one account
- AI detection can return false positives
- Paid plan prices not clear on the fetched page
- Free checks are capped at 15,000 characters
Isgen
- Highlights AI text sentence by sentence
- Bulk scanning on paid plans
- Bundles plagiarism and grammar checks
- AI detectors can flag human writing
- Free checks capped at 5,000 characters
- Listed prices assume yearly billing
Which one should you choose?
Choose ZeroGPT if you want:
- Free detector with no sign-up needed
- Shows which sentences look AI-written
- Many writing tools under one account
Watch out: ai detection can return false positives.
Choose Isgen if you want:
- Highlights AI text sentence by sentence
- Bulk scanning on paid plans
- Bundles plagiarism and grammar checks
Watch out: ai detectors can flag human writing.
ZeroGPT vs Isgen FAQ
What is the difference between ZeroGPT and Isgen?
ZeroGPT: AI text detector with a humanizer, plagiarism checker and writing tools. Isgen: AI detector with plagiarism checking, humanizer and slide maker. Both are writing tools.
Is ZeroGPT or Isgen cheaper?
ZeroGPT starts at See pricing page and Isgen starts at See pricing page. Check both pricing pages for current plans.
Do ZeroGPT and Isgen have free plans?
ZeroGPT: Yes. Isgen: Yes.
Who makes ZeroGPT?
ZeroGPT is made by ZeroGPT.
Who makes Isgen?
Isgen is made by Isgen.
Which should I choose, ZeroGPT or Isgen?
Choose ZeroGPT if you value free detector with no sign-up needed and shows which sentences look ai-written. Choose Isgen if you value highlights ai text sentence by sentence and bulk scanning on paid plans.