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Coda One vs ZeroGPT

An honest comparison to help you choose the right tool

Feature
Coda One
ZeroGPT
Free tier
Detector free, no daily limit, 3,000 words/check
Free, no signup — 15,000 characters per scan
Per-sentence analysis
Yes, color-coded
Yes, highlighted
Detection signals
4 weighted (stat, phrase pattern, dash density, tricolon)
Single score, method not published
How a score is presented
Sentence highlights, with the reason
Claims 98%+; no reproducible method published
AI humanizer
Yes, 3/day free
Yes, free
AI rewriter
Yes, 3/day free
Yes (AI Paraphraser), free
Plagiarism checker
No
Yes, free
Signup required
No
No
Batch file upload
No
Yes
API access
Planned
Yes (paid)
Tool count
4 tools (detector, humanizer, rewriter, grammar)
15 tools incl. image/video detection, translator, citations

ZeroGPT figures checked against their own pricing and product pages on 28 August 2026. They change these often; if you are deciding on the strength of a row, check theirs too. Our own figures come from the running code — free limits from the tool API.

Why Choose Coda One?

4 Tools, One Page Each

AI Detector, AI Humanizer, AI Rewriter, Grammar Checker. One page per job, without a second subscription.

Generous Free Tier

All 4 tools open directly in the browser with no signup. The AI Detector has no daily limit; the other three give you 3 free uses a day.

Text Is Not Kept

Used anonymously, the text you submit is not stored after the response is generated, and it is never used to train models.

Guides Around the Tools

Plus, explore our AI scenario guides, MCP server resources, and agent skills to get more from your tools.

ZeroGPT gained popularity as one of the early AI detection tools, and it has since grown into a broad free suite: alongside the detector it ships a humanizer, paraphraser, grammar checker, summarizer, plagiarism checker, translator and image and video detectors, at no cost and with no signup.

Coda One is much narrower — four tools — and on breadth this is not a close comparison. If you want the most free tools for nothing, take ZeroGPT and do not pay us. They have more of them, their free scan takes 15,000 characters against our 3,000 words, and they include a plagiarism checker we do not have at all.

The honest answer for every detector in this category, theirs and ours, is: not far enough to accuse anyone. ZeroGPT advertises 98%+ accuracy with no method you can reproduce. We do not answer that advertisement with a number of our own. No detector is always right. Pick Coda One if you want the sentences that carry AI tells, with the reason. Pick ZeroGPT if breadth does.

Try It Yourself

See how Coda One's AI Detector compares in a browser-first workflow.

Try AI Detector Free

Frequently Asked Questions

How does Coda One compare with ZeroGPT?
ZeroGPT is the broader free product — fifteen tools against our four, including a plagiarism checker and image and video detection we do not offer. Coda One is narrower: its detector marks the sentences in your draft that read as machine-written. The difference worth choosing on is what the page shows you: we mark the sentences, and they publish a marketing accuracy figure.
Is ZeroGPT free?
Yes, and generously so — no signup, and their scan box accepts 15,000 characters at a time. Coda One's detector is also free with no daily limit, at 3,000 words per check. On free detection alone there is no strong reason to pick us over them.
How should I compare detector quality?
Ask what the score is for, and what would change your mind. ZeroGPT publishes a 98%+ accuracy claim without a reproducible method. We do not answer that with a number of our own. No detector is always right — treat any score as a starting point, not proof of authorship.
Can ZeroGPT detect humanized AI text?
We cannot tell you. Any detector telling you it catches rewritten text is making a claim we will not repeat. We have no measurement of ZeroGPT's engine, and we do not publish a figure of our own for that case.
Which is easier to use?
Both are paste-and-analyze. ZeroGPT shows a single percentage; Coda One shows the four weighted signals behind the score — sentence-length statistics, AI phrase patterns, dash density and tricolon rhythm — plus which one is holding the score up. That is more useful if you want to know why a sentence was flagged, and more clutter if you only want a number.
Does either tool store my submitted text?
Coda One processes text server-side. Signed out, it is processed and not kept; signed in, the input and result are saved to your tool history, which you can delete from the dashboard at any time. ZeroGPT's privacy policy covers usage data but is vague about text submissions. Either way, avoid pasting confidential material (passwords, proprietary data, personal information) into any detector, including ours.
Can I integrate either tool into my own app or workflow?
ZeroGPT offers a paid API for programmatic integration. Coda One's API is on the roadmap but not yet available. If you need to run AI detection at scale within your own application -- such as screening submissions automatically -- ZeroGPT's API is currently the only option between the two.

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AI Writing: Detector · vs GPTZero · Humanizer · Rewriter