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Most buyers should pick Grammarly.
Choose Grammarly if you want a proofreader and writing assistant for everyday drafts, tone, clarity, and sentence rewrites; its Pro plan is listed at €12/month, while the free tier includes 100 AI prompts monthly. Choose ZeroGPT if AI-text detection is the main task and you also want bundled humanizing and plagiarism tools. Its free tier lists 15,000 characters per detection scan, but paid-plan prices are not published here. Treat a detector score as a signal, not proof.
01Side by side
| Grammarly | ZeroGPT | |
|---|---|---|
| Starting price | Free; Pro is €12/month | Free; paid starting price not published |
| Free plan | 100 AI prompts/month | 15,000 characters/scan; 0 batch files |
| Best for | Proofreading, tone, clarity, and rewrites | AI detection and bundled writing tools |
| Core strength | Writing assistance across text boxes | AI-text detection with sentence highlights |
| Learning curve | Not published | Not published |
| Integrations/data | Works in text boxes, including Zendesk | API, WhatsApp, and Telegram access |
| Team/seat costs | Pro €12/month; Enterprise custom | Business/EDU prices not published |
| Support | Review support score: 5 | Review support score: 5 |
Grammarly Choose Grammarly if
- Choose Grammarly if you need grammar and clarity fixes.
- Choose Grammarly if you want tone suggestions and sentence rewrites.
- Choose Grammarly if published Pro pricing matters to your decision.
ZeroGPT Choose ZeroGPT if
- Choose ZeroGPT if AI-text detection is your main task.
- Choose ZeroGPT if you want detection plus humanizing and plagiarism tools.
- Choose ZeroGPT if its free scan limits fit your needs.
02Pricing compared
Grammarly has a free plan with 100 AI prompts per month. Its Pro plan is listed at €12 per month and includes 2,000 prompts per member, full-sentence rewrites, plagiarism and AI-text detection, plus limited brand settings. The published pricing information does not list an annual price. Enterprise pricing is custom.
ZeroGPT’s free plan includes 15,000 characters per detection scan, no batch files, and 300 plagiarism-checker words as a one-time allowance. It also lists 1,250,000 AI detection words per month. Prices for Personal and Business / EDU plans are not published in the published pricing information; the page advertises 40% off annual billing. Enterprise pricing is custom, and API plans are usage-based. If a known paid price matters, Grammarly is easier to budget for; compare ZeroGPT’s paid offer before switching.
03Features and depth
These tools overlap on AI detection, but they solve different main problems. Grammarly is an AI writing assistant for proofreading, tone, and clarity. Its homepage lists paragraph rewrites and a Humanizer agent, while Pro adds full-sentence rewrites, plagiarism checking, AI-text detection, and 2,000 AI prompts per member each month. Its free plan includes proofreading and tone feedback, plus 100 prompts.
ZeroGPT centers on AI-content detection. Its detector highlights AI-written sentences and gives a percentage gauge; the product also lists a humanizer, plagiarism checker, paraphraser, summarizer, grammar checker, translator, and image and video detectors. Batch uploads and PDF reports are listed features, though the free plan allows zero batch files. The published material says detection uses DeepAnalyse technology, but it does not establish detector accuracy. Choose by workflow: Grammarly for improving drafts, ZeroGPT for detection and bundled text tools. Treat either detector result as a signal, not proof.
04Ease of use and learning curve
For everyday writing, Grammarly’s workflow is the more direct fit: it checks grammar, tone, and clarity where you type, including apps such as Zendesk. The free plan gives individuals a way to proofread without paying, while Pro adds more prompts and advanced writing features.
ZeroGPT is organized around detection scans and a wider set of separate tools. Its free plan has a 15,000-character limit per detection scan, so larger jobs may not fit in one go; batch uploads are not included. The published material does not describe setup steps or report comparative usability testing, so we would not call one objectively easier. If you want writing feedback in the flow of drafting, start with Grammarly. If you primarily need a detector, try ZeroGPT’s free allowance and judge whether its limits fit your documents.
Questions people ask
Is Grammarly considered AI?
Yes. Grammarly describes itself as an AI-powered writing assistant, with proofreading, tone and clarity suggestions, sentence rewrites on Pro, and an AI Detector agent. That does not mean every Grammarly feature generates text: its free plan also checks writing and tone.
What is GPTZero?
The published published material does not describe GPTZero, so we can’t give a sourced account of its features, pricing, or limits. This comparison covers Grammarly and ZeroGPT, whose free plan lists 15,000 characters per AI-detection scan and whose paid-plan prices are not published here.
Is this ChatGPT?
If you mean whether text was written by ChatGPT, ZeroGPT says its detector flags text from ChatGPT and other models and displays an AI-content percentage. That score is not proof of authorship. Grammarly also lists an AI Detector agent, but the published information gives no accuracy comparison.
What is more accurate, Grammarly or QuillBot?
We can’t rank Grammarly against QuillBot from the published information: it includes no QuillBot details and no comparative accuracy data. Grammarly lists an AI Detector agent, while ZeroGPT describes its own detector, but neither claim establishes which detector is more accurate. Treat scores as signals, not proof.