kitio.aiPlag vs Isgen
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Plag 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
- Plagiarism check
- AI content detection
- Translated plagiarism detection
- 129 languages
- Private file handling
- Many file formats
- Sentence-level AI detection
- Plagiarism checker
- Bulk file scanning
- Grammar checker
- AI humanizer
- Presentation maker
| Feature | Plag | Isgen |
|---|---|---|
| Best for | Plagiarism checker and AI content detector for documents | 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 | Plag | Isgen |
| Based in | – | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Plag 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 Oct 29, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Plag
- Files not stored in comparison databases
- Free originality scores
- Wide language coverage
- Full reports are priced by document length
- AI detectors can produce false positives
- No flat subscription price shown
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 Plag if you want:
- Files not stored in comparison databases
- Free originality scores
- Wide language coverage
Watch out: full reports are priced by document length.
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.
Plag vs Isgen FAQ
What is the difference between Plag and Isgen?
Plag: Plagiarism checker and AI content detector for documents. Isgen: AI detector with plagiarism checking, humanizer and slide maker. Both are writing tools.
Is Plag or Isgen cheaper?
Plag starts at See pricing page and Isgen starts at See pricing page. Check both pricing pages for current plans.
Do Plag and Isgen have free plans?
Plag: Yes. Isgen: Yes.
Who makes Plag?
Plag is made by Plag.
Who makes Isgen?
Isgen is made by Isgen.
Which should I choose, Plag or Isgen?
Choose Plag if you value files not stored in comparison databases and free originality scores. Choose Isgen if you value highlights ai text sentence by sentence and bulk scanning on paid plans.