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
Scribbr vs QuillBot: AI Detector (2026)
Scribbr and QuillBot run on the same underlying engine, but they hand it to different readers. Scribbr strips away everything but the check itself, aimed at a student who wants a fast, no-sign-up answer. QuillBot keeps the check inside a full writing suite, useful once paraphrasing or grammar work is already part of the job.
Scribbr and QuillBot are both Learneo products, and Scribbr's detector runs on QuillBot's engine. The tools serve different workflows: QuillBot bundles detection alongside paraphrasing, grammar, and citation tools; Scribbr presents the detector on its own, aimed at students checking academic writing without signing up. Both free tiers cap submissions at 1,200 words. Slop or Not checks text 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 | Scribbr | QuillBot |
|---|---|---|---|
| Best fit | On-device iPhone and Mac checks or free browser checks for text and images | Students and educators who need a free text check | Writers who want AI detection beside QuillBot writing tools |
| Text detection | Checks writing in the native app and online checker | Free AI detector with average accuracy for GPT-3.5-class text; premium tier covers GPT-4, Gemini, and Copilot | 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 | Paragraph-level feedback and AI-generated, AI-refined, and human-written categories are listed | 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 | No-sign-up browser checker | 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 | Not publicly clear | Not publicly clear |
| Classroom workflow | Useful for checking student writing on-device in the app or through deleted-after-processing online checks | Student and educator use cases are listed | 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. | Unlimited free checks with up to 1,200 words per submission | 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. | States submissions remain private and are not stored or shared | 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 | Text-only checker with up to 1,200 words per submission | 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.
Sources reviewed
Where Slop or Not Fits
Both free tiers stop at 1,200 words a submission, no matter which one a reader picks. Slop or Not carries no such ceiling in the native app, and it checks that essay's photos too, on iPhone or Mac.
- 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.
Scribbr
Use it for students and educators who want a no-sign-up text check.
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 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.
Slop or Not vs Scribbr
Scribbr's free detector needs no sign-up and gives paragraph-level feedback, but it's tuned to catch GPT-3.5-class writing, and 1,200 words is the ceiling per submission.
ZeroGPT vs QuillBot
ZeroGPT is a bigger single paste with no other tools; QuillBot is a smaller paste with a paraphrasing suite attached.
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.
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.
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.
