Shortlist by what you need
Start here if you know why you are leaving ZeroGPT.
Want the closest match?
DecheckerMost similar to ZeroGPT in what it does, its category and its price.
Visit (opens Dechecker in a new tab)Need a free plan?
Originality.AIHas a free plan, rated 4.5 out of 5.
Visit (opens Originality.AI in a new tab)Want the lowest price?
CopyleaksFrom $9.99/mo, the lowest starting price here.
Visit (opens Copyleaks in a new tab)Want the best rated?
WriterBuddyRated 3.7 out of 5 in our review, against 3.5 for ZeroGPT.
Visit (opens WriterBuddy in a new tab)
At a glance
Green means better than ZeroGPT, red means worse. Prices are starting prices per month.
| Tool | Our rating | Starts at | Free plan | Best for | Compare |
|---|---|---|---|---|---|
 ZeroGPTBaseline | 3.5 | Free | Yes | AI detection across text, image and video, with sentence-level highlighting. | |
| Dechecker | 3.7+0.2 | Free | Yes | Sentence-level AI detection across ChatGPT, Claude and Gemini output, paired with one-click humanization rewrites. | vs ZeroGPT |
 Winston AI | 3.5Same | Free | Yes | AI content and image detection claimed accurate 99.98% of the time - sentence-level highlights, plagiarism checks, and deepfake detection in one report. | vs ZeroGPT |
 Undetectable AI | 3.2−0.3 | Free | Yes | Detects AI content across text, image, audio and video, and also rewrites text to evade detection. | vs ZeroGPT |
 AI Detector by Buildly | 2.5−1.0 | Free | Yes | Free AI text detection with sentence-level highlighting, in a category that does not work. | vs ZeroGPT |
 ZeroGPT.cc | 2.9−0.6 | Free | Yes | Paste text, get sentence-by-sentence AI-detection with color-coded highlighting - free, unlimited checks against GPT, Claude, Gemini, and more, no relation to zerogpt.com. | vs ZeroGPT |
| Originality.AI | 4.5+1.0 | $12.95/mo | Yes | An AI and plagiarism detector built for publishers who need to verify content before it goes live | vs ZeroGPT |
| WriterBuddy | 3.7+0.2 | Free | Yes | 40+ academic writing tools in one place - co-writer, plagiarism checker, citation generator (MLA/APA/Chicago), ChatPDF - across 25+ languages. | vs ZeroGPT |
| Copyleaks | 4.2+0.7 | $9.99/mo | Yes | Copyleaks scans text and images for plagiarism and AI-generated content across dozens of languages for schools and businesses. | vs ZeroGPT |
The alternatives in detail
In order of how closely each one matches ZeroGPT.
Dechecker
3.7Free
vs ZeroGPT+0.2
Sentence-level AI detection across ChatGPT, Claude and Gemini output, paired with one-click humanization rewrites.
- Sentence-level AI detection across ChatGPT, Claude and Gemini output
- One-click humanization rewrite suggestions
- Bulk file upload and batch analysis
Sentence-level flagging is more actionable than one whole-document score
AI detectors carry real false-positive/false-negative rates industry-wide
Winston AI
3.5Free
vs ZeroGPTSame
AI content and image detection claimed accurate 99.98% of the time - sentence-level highlights, plagiarism checks, and deepfake detection in one report.
- AI text detection claimed 99.98% accurate across major LLMs
- AI-generated image and deepfake detection
- Plagiarism checking alongside AI detection
Free tier available with no credit card required
Paid tier pricing isn't shown on the homepage
Undetectable AI
3.2Free
vs ZeroGPT−0.3
Detects AI content across text, image, audio and video, and also rewrites text to evade detection.
- AI text detection with flagged sections
- Image, audio and video AI detection
- Fake PDF detector
Detection across image, audio and video, not just text
Ships a humanizer for evading detection, with students among named users
AI Detector by Buildly
2.5Free
vs ZeroGPT−1.0
Free AI text detection with sentence-level highlighting, in a category that does not work.
- Sentence-level highlighting rather than a single score
- Calibrated confidence scores
- Detects partially AI-written passages in mixed text
Sentence-level output shows where a judgement came from
AI text detection is not reliable enough for consequential decisions
ZeroGPT.cc
2.9Free
vs ZeroGPT−0.6
Paste text, get sentence-by-sentence AI-detection with color-coded highlighting - free, unlimited checks against GPT, Claude, Gemini, and more, no relation to zerogpt.com.
- Sentence-by-sentence AI-detection with color-coded highlighting
- Readability scoring alongside detection
- Multi-model detection - GPT, Claude, Gemini, and more
Genuinely free and unlimited, no paywall on core detection
AI-detection accuracy is inherently imperfect and improves-then-degrades as generative models evolve
Originality.AI
4.5$12.95/mo
vs ZeroGPT+1.0
An AI and plagiarism detector built for publishers who need to verify content before it goes live.
- AI content detection independently benchmarked for accuracy against competing detectors
- Live-web plagiarism checking rather than a static, outdated reference database
- Bundled fact-checking, grammar review, and readability scoring in the same platform
Accuracy claims are independently benchmarked rather than only self-reported
No unlimited free tier; the free AI checker is capped at a small word count
WriterBuddy
3.7Free
vs ZeroGPT+0.2
40+ academic writing tools in one place - co-writer, plagiarism checker, citation generator (MLA/APA/Chicago), ChatPDF - across 25+ languages.
- Co-Writer: brainstorming, autocomplete, grammar checking
- Citation generator: MLA, APA, Chicago formats
- Plagiarism checker and AI content detector
Covers the full academic writing workflow, not just drafting
40+ tools means real exploration to find the right one for a task
Copyleaks
4.2$9.99/mo
vs ZeroGPT+0.7
Copyleaks scans text and images for plagiarism and AI-generated content across dozens of languages for schools and businesses.
- Combined plagiarism and AI-content detection in one scan
- Multi-language support across dozens of languages
- Image-based AI detection alongside text scanning
Combines plagiarism and AI-detection in one subscription instead of two tools
Credit-based pricing gets confusing to estimate for high-volume users
FAQ
Questions people ask
Is ZeroGPT free?
ZeroGPT has a free plan.
What is the best free alternative to ZeroGPT?
Originality.AI is the highest-rated alternative here with a free plan (4.5 out of 5). Other free options: Copyleaks, Dechecker, WriterBuddy.
What is the cheapest alternative to ZeroGPT?
Among paid plans, Copyleaks has the lowest starting price (from $9.99/mo). If you need it free, start with Originality.AI.
How did you pick these alternatives?
We match tools on what they do, their category and their price, using the details in our directory. Ratings come from our reviews and reader reviews.