ZeroGPT
Free web-based AI text detector with a set of add-on writing tools.
Updated · AppBreakup editorial · Web
Is ZeroGPT free?
Free plan, plus paid plans
- Free plan:
- $0 forever
Checked on ZeroGPT's site Nov 8, 2026
Switch from ZeroGPT to
All 7
GPTZeroCompareFree plan + paid
Originality.aiStarting price: $12.95/month billed annually (Pro); $14.95 monthly
GrammarlyStarting price: $12 per member/month billed annually ($30 monthly), Pro
- Verified facts
- 5 of 5
- Alternatives ranked
- 7
- Approved reviews
- 0
- Visits sent from here
- 0
About ZeroGPT
ZeroGPT is a web tool that estimates whether a piece of text was written by an AI model such as ChatGPT, Gemini or Claude. You paste text or upload files, and it returns an overall percentage along with the sentences it thinks are machine-written, highlighted in the text. Around the detector it has grown a bundle of extras: a plagiarism checker, paraphraser, summarizer, grammar checker, translator, an AI image and video detector, and a humanizer that rewrites AI text to read more naturally. The basic detector is free without an account and has a per-check character limit; paid personal and business plans raise limits, add batch uploads and PDF reports, and a pay-as-you-go API serves organisations that want to build detection into their own systems. It can also be used through WhatsApp and Telegram bots. Like every AI detector, its scores are probabilistic, so a result is a signal to look closer rather than proof of who wrote something.
Best for: Students, teachers and editors who want a quick free AI-text check without signing up.
ZeroGPT pricing (checked Nov 8, 2026)
Each line is quoted from ZeroGPT's own site, with the page it came from.
| Plan or term | What it says | Checked | Source |
|---|---|---|---|
| Free plan | $0 forever | Nov 8, 2026 | zerogpt.com |
Pros and cons
What works
- Basic detector works free and without an account
- Highlights the specific sentences it flags as AI-written
- Pay-as-you-go API for teams that want to automate checks
- Also usable through WhatsApp and Telegram bots
Why people leave
- Scores are probabilistic and can flag human writing as AI
- Free checks have a character limit per submission
- Offering a humanizer next to a detector muddies its purpose for educators
ZeroGPT vs GPTZero, Originality.ai and Grammarly
From each app's listing and the prices verified on its own site. A dash means we haven't verified it yet.
| Attribute | ZeroGPT | GPTZero | Originality.ai | Grammarly |
|---|---|---|---|---|
| Pricing | Free plan + paid | Free plan + paid | Free plan + paid | Free plan + paid |
| Verified price | — | — | $12.95/month billed annually (Pro); $14.95 monthly | $12 per member/month billed annually ($30 monthly), Pro |
| Free plan | $0 forever | Yes | Yes, 10K words one time | Yes, $0 a month with 100 AI prompts |
| Open source | No | No | No | No |
| Self-hostable | No | No | No | No |
| Platforms | Web | Web, Browser extension | Web, Browser extension | Web, Windows, macOS, iOS, Android, Browser extension |
Top ZeroGPT alternatives
See all 7- 1GPTZero68.8
Built for classrooms, with writing-process replay and LMS integrations that help when a score is disputed.
- 2Originality.ai64.8
Aimed at publishers and SEO teams, with site scans, fact checking and team accounts on pay-as-you-go credits.
- 3Grammarly64.0
Its free AI detector sits next to grammar and plagiarism checks, handy if you already use Grammarly.
- 4
Copyleaks55.3Pairs AI-content detection with plagiarism checking, with an API and LMS integrations for schools.
- 5
QuillBot53.4Its free AI detector sits next to a paraphraser and grammar checker you may already use for writing.
Why people left ZeroGPT
In reviewers' own words, from reviews of the apps they moved to. These are their opinions, not ours.
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Reviews
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ZeroGPT: common questions
What is ZeroGPT?
ZeroGPT: Free web-based AI text detector with a set of add-on writing tools. Best for students, teachers and editors who want a quick free AI-text check without signing up. Available for Web.
Is ZeroGPT free?
ZeroGPT has a free plan and paid plans. Free plan: $0 forever (checked on ZeroGPT's own site).
How much does ZeroGPT cost?
ZeroGPT is free with paid plans. Free plan: $0 forever. Checked on ZeroGPT's own site, November 2026.
Is ZeroGPT open source?
No, ZeroGPT is not open source.
What platforms does ZeroGPT run on?
ZeroGPT is available for Web.
What are the best alternatives to ZeroGPT?
The highest-ranked ZeroGPT alternatives right now are GPTZero, Originality.ai and Grammarly. See the full ranked list for pricing, platforms and verified facts.
ZeroGPT vs GPTZero: what's the difference?
Both ZeroGPT and GPTZero are free with paid plans. Only GPTZero runs on Browser extension.