kitio.aiGPTZero vs 2Slash
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. GPTZero starts at See pricing page and 2Slash starts at $10/mo. 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
- Works in any text field
- Expert prompt library
- Personal writing voice
- Image generation
- Text to speech
| Feature | GPTZero | 2Slash |
|---|---|---|
| Best for | AI detector that flags machine-written text for teachers and editors | Browser extension that adds AI writing to any text field |
| Category | Writing | Writing |
| Pricing model | Freemium | Freemium |
| Starting price | See pricing page | $10/mo |
| Free plan | Yes | Yes |
| Made by | GPTZero | 2Slash |
| Based in | United States | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
GPTZero starts at See pricing page and 2Slash starts at $10/mo. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
Free
Free
- 3,000 words
- 1,000 text-to-speech words
- 50+ free prompts
Lite
$10/mo
- 10,000 words
- GPT-4o and GPT-4o mini
- 100+ expert prompts
Premium
$14/mo
- 20,000 words
- 25 generated images
- All features
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
2Slash
- No prompt writing needed
- Works across all sites
- Free plan to start
- Free plan limited to 3,000 words
- Browser-only tool
- Relies on GPT-4o models
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 2Slash if you want:
- No prompt writing needed
- Works across all sites
- Free plan to start
Watch out: free plan limited to 3,000 words.
GPTZero vs 2Slash FAQ
What is the difference between GPTZero and 2Slash?
GPTZero: AI detector that flags machine-written text for teachers and editors. 2Slash: Browser extension that adds AI writing to any text field. Both are writing tools.
Is GPTZero or 2Slash cheaper?
GPTZero starts at See pricing page and 2Slash starts at $10/mo. Check both pricing pages for current plans.
Do GPTZero and 2Slash have free plans?
GPTZero: Yes. 2Slash: Yes.
Who makes GPTZero?
GPTZero is made by GPTZero, based in United States.
Who makes 2Slash?
2Slash is made by 2Slash.
Which should I choose, GPTZero or 2Slash?
Choose GPTZero if you value free tier for regular checks and writing replay shows the drafting process. Choose 2Slash if you value no prompt writing needed and works across all sites.