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
ZeroGPT vs QuillBot: AI Detector (2026)
ZeroGPT wins on raw paste size: 15,000 characters, no sign-in, no other product attached. QuillBot wins on context: the same kind of check sits next to the grammar and paraphrasing tools a writer already has open, at the cost of a 1,200-word ceiling and a six-scan daily limit.
ZeroGPT and QuillBot both offer free AI text detection in the browser, but they have different purposes. ZeroGPT is a standalone checker: paste up to 15,000 characters and get a result without signing in. QuillBot's detector is bundled with paraphrasing, grammar, and citation tools; the free tier caps checks at 1,200 words and 6 scans per day. Slop or Not runs text checks on iPhone and Mac on-device, with no per-document word cap in the native app.
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 | QuillBot |
|---|---|---|---|
| Best fit | On-device iPhone and Mac checks or free browser checks for text and images | Fast free web checks for AI-written text | Writers who want AI detection beside QuillBot writing tools |
| Text detection | Checks writing in the native app and online checker | Free AI content detector for ChatGPT, GPT-5, Gemini, and more | Free AI checker for text from ChatGPT, GPT-5, Gemini, Claude, and other platforms |
| Image detection | Checks photos, synthetic images, and provenance clues in the app or online checker | No | Links to a separate AI image detector from the AI detector page |
| Deepfake detection | Covers deepfake and synthetic-image checks as image detection | No | 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 | Not publicly clear |
| Manual forensic tools | Reports detector and provenance evidence in native and online checks; not a manual forensic editor | No | 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 | Reports AI-generated, human-written and AI-refined, and human-written percentages |
| 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 | Free web detector |
| Native Apple app | Native iPhone and Mac app for on-device checks; browser users can use the free online checker | No | 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 | Not publicly clear |
| Classroom workflow | Useful for checking student writing on-device in the app or through deleted-after-processing online checks | Not publicly clear | Educator use case is listed for reviewing assignments and essays |
| 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 | Free tier lists up to 1,200 words per scan and up to 6 scans per day |
| 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 | States text is used only for the AI detection report and is not sold or shared with third parties for their purposes |
| 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 | Free tier is capped at 1,200 words and 6 scans per day |
✓ = supported, ✕ = not offered, – = not publicly documented. Details reviewed June 2026 from public product, pricing, documentation, and benchmark pages.
Where Slop or Not Fits
A 15,000-character ceiling on one side, a six-scans-a-day limit on the other. Slop or Not clears the word ceiling too: the native app carries no per-document word cap, just a daily check limit that resets every day.
- 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.
QuillBot
Use it for writers who want detection alongside paraphrasing, grammar, and citation tools.
Related Comparisons
Keep comparing adjacent tools before you pick a workflow.
Slop or Not vs ZeroGPT
ZeroGPT needs no account and returns a verdict in seconds, but paste in more than 15,000 characters and it stops reading.
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.
GPTZero vs ZeroGPT
GPTZero brings classroom integrations and an API; ZeroGPT brings speed and a 15,000-character ceiling with no account needed.
Scribbr vs QuillBot
Scribbr and QuillBot share a detection engine — one strips it down for students, the other bundles it with writing tools.
Phrasly vs QuillBot
Phrasly bundles its detector with a humanizer built to beat it; QuillBot bundles its detector with grammar and paraphrasing tools instead.
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.
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.
