Slop or Not
Use it for people who want native Apple checks or the free online checker for text, images, and provenance clues.
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AI Detector
Slop or Not vs ZeroGPT: AI Detector (2026)
ZeroGPT is the fastest gut-check for a short paste: no account, up to 15,000 characters, a result in seconds. Push past that character cap and Slop or Not takes over — the iPhone and Mac app has no ceiling on how much text goes in.
ZeroGPT is a fast, free web checker for AI-written text that accepts up to 15,000 characters without creating an account. It covers text only and routes checks through its servers. Slop or Not also checks images alongside text, and native iPhone and Mac checks run on-device so nothing is uploaded.
Privacy, Pricing, and Workflow Matrix
Public product, pricing, documentation, and benchmark pages can change. Source links are listed below the table so the cells stay readable.
| Feature | Slop or Not | ZeroGPT |
|---|---|---|
| Best fit | On-device iPhone and Mac checks or free browser checks for text and images | Fast free web checks for AI-written text |
| Text detection | Checks writing in the native app and online checker | Free AI content detector for ChatGPT, GPT-5, Gemini, and more |
| Image detection | Checks photos, synthetic images, and provenance clues in the app or online checker | No |
| Deepfake detection | Covers deepfake and synthetic-image checks as image detection | No |
| Metadata and provenance signals | Reads SynthID, C2PA, and IPTC signals in native and online image checks when a file carries them | Not publicly clear |
| Manual forensic tools | Reports detector and provenance evidence in native and online checks; not a manual forensic editor | No |
| Evidence level | Probability verdict plus provenance signals, with internal-test caveats instead of 99.9% certainty claims | Returns probabilities and detailed statistics through API plans |
| Browser checker | Free online checker runs in any browser on Numen's private Mac server; submissions are deleted after processing | Public web textarea lists a 15,000 character input limit |
| Native Apple app | Native iPhone and Mac app for on-device checks; browser users can use the free online checker | No |
| API workflow | Pro Mac app includes a local CLI and MCP server; no public hosted API | Business API plans and API docs are listed |
| Classroom workflow | Useful for checking student writing on-device in the app or through deleted-after-processing online checks | Not publicly clear |
| Free tier & limits | Free daily checks in the iPhone and Mac app and a free online checker in any browser. Pro removes the native daily cap; the native app has no per-document word cap. | Free web checks with a 15,000 character input box; API plans are pay as you go |
| Privacy | Native checks stay on the iPhone or Mac and never send submitted text or images to a third-party AI provider. Online checks run on Numen's own Apple hardware, and submissions are deleted after processing. | Its FAQ says submitted text is processed only to generate a result and then discarded, and is not saved, shared, or used to train its model; the separate privacy policy does not name detection text as a collected category |
| Main limitation | On-device privacy requires iPhone or Mac; browser checks run on Numen's private Mac server, not on-device | Public web checker is capped at a 15,000 character input limit |
✓ = supported, ✕ = not offered, – = not publicly documented. Details reviewed June 2026 from public product, pricing, documentation, and benchmark pages.
Sources reviewed
Where your text & images go
With ZeroGPT, your submitted text is processed to generate a detection score, and it collects your name and email if you contact support. Its FAQ states submitted text is not saved, shared, or used to train its model, and is discarded once a result is generated. See the ZeroGPT FAQ for details. Slop or Not keeps native checks on your iPhone or Mac, and online checks run on Numen's own Apple hardware and are deleted after processing.
Where Slop or Not Fits
Once a document runs past ZeroGPT's 15,000-character box, Slop or Not keeps checking on iPhone or Mac with no character limit and no upload.
- Slop or Not runs its own detection models, so no third-party AI provider sees your text or images. Native checks run on the Apple Neural Engine; online checks run on Numen's self-hosted Apple hardware, and submissions are deleted after processing.
- Free daily checks in the iPhone and Mac app and in the free online checker. Pro removes the daily cap, and native checks have no per-document word cap.
How They Compare by Workflow
Slop or Not is not the right answer for every workflow — pick the tool whose strongest workflow matches the check you need to run.
ZeroGPT
Use it for quick web checks for AI-written text.
Common Questions
Does ZeroGPT check AI-generated images?
No — ZeroGPT is a text-only detector. Slop or Not checks both AI-generated text and images, including SynthID, C2PA, and IPTC provenance reads when a file carries them.
Which one is better when privacy matters?
Slop or Not — native checks on iPhone and Mac run without uploading anything. ZeroGPT processes every paste on its own servers.
Related Comparisons
Keep comparing adjacent tools before you pick a workflow.
Slop or Not vs GPTZero
GPTZero lives in Canvas and Google Docs and never leaves the browser — and it never checks an image, despite the 'AI Vision' name.
Slop or Not vs Originality.ai
Originality.ai tracks every scan in a dashboard built for agencies, but there's no free tier — every check burns a credit at roughly 100 words apiece.
Slop or Not vs Copyleaks
Copyleaks plugs into seven different LMS platforms and even flags deepfake video, but the sentence-level detail and full reporting sit behind an enterprise account.
Slop or Not vs Winston AI
Winston AI bundles plagiarism checks and writing feedback with its AI verdict, but the free lite checker stops at 2,000 characters and the real trial runs out in 14 days.
Slop or Not vs Turnitin
Turnitin's AI-writing indicator is built into a workflow schools already trust, but there's no public version — access runs through a school subscription or not at all.
Slop or Not vs QuillBot
QuillBot folds its AI detector into a paraphrasing suite writers already use, but the free tier caps at 1,200 words a scan and six scans a day.
Privacy tools from the same team
More From Numen
AI can now fake a profile photo or wrap a scam in a link that looks safe to tap. Numen builds the apps that put you back in charge: spot AI-generated text and images with Slop or Not, run the best open-source models uncensored and private with Private LLM, and strip trackers from links and QR codes before they follow you with Clean Links.
One belief runs through all three: your data belongs to you, and no one else.
