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
Pangram vs Turnitin: AI Detector (2026)
Pangram backs its checks with cited accuracy research from Chicago Booth and Maryland before a single school gets involved — four free credits a day, no contract required. Turnitin skips that pitch entirely: it ships bundled into a school's existing subscription, so the only way in runs through an institution's contract, not a research citation.
Pangram is a public self-serve AI text detector: anyone can check text without a school contract, with 4 free credits per day and paid plans for heavier use. Turnitin is institution-only — access comes through a school or university subscription, and there is no public consumer tier. Both target academic integrity, but Pangram works for an individual teacher with no institutional backing while Turnitin sits inside a school's submission workflow. Slop or Not runs on-device checks on iPhone and Mac, also without any institutional account.
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 | Pangram | Turnitin |
|---|---|---|---|
| Best fit | On-device iPhone and Mac checks or free browser checks for text and images | AI text checks for educators, publishers, and institutions (vendor claims 99.98% accuracy) | Institutional academic integrity workflows |
| Text detection | Checks writing in the native app and online checker | Labels text as human, AI, or AI-assisted and reports how much reads as AI-generated | AI writing and paraphrasing detection inside Turnitin Originality |
| Image detection | Checks photos, synthetic images, and provenance clues in the app or online checker | No | No |
| 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 an AI percentage with interpretability highlights and PDF or DOCX upload | AI writing detection indicator and report for submitted academic content |
| Browser checker | Free online checker runs in any browser on Numen's private Mac server; submissions are deleted after processing | Web app plus a Chrome extension and Google Docs integration | No No public self-serve web checker; access is institution-only |
| 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 | Developer API with pay-as-you-go credits is listed | Turnitin Core API (TCA) exists for institutional partners and LMS integrators; not a public self-serve API |
| Classroom workflow | Useful for checking student writing on-device in the app or through deleted-after-processing online checks | Institutional License adds LMS integrations and unlimited checks for schools | Designed for student submissions and institutional academic integrity workflows |
| 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 plan lists 4 credits per day with no payment method; one credit covers up to 1,000 words | Public page routes buyers to schedule a call rather than self-serve free use |
| 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. | Text is sent to Pangram and checked in the cloud to return a result | Product privacy materials are linked from Turnitin product pages |
| Main limitation | On-device privacy requires iPhone or Mac; browser checks run on Numen's private Mac server, not on-device | Text only; regular use beyond the 4 daily free credits moves to paid credit plans | Institution product, not a public self-serve checker |
✓ = supported, ✕ = not offered, – = not publicly documented. Details reviewed June 2026 from public product, pricing, documentation, and benchmark pages.
Where Slop or Not Fits
Pick between four credits a day or no public account at all, and either way something caps the check. Slop or Not's free tier has its own daily limit, but the native app takes a full essay on iPhone or Mac with no per-document word cap and no school subscription required.
- 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.
Pangram
Use it for academic and publisher text detection it markets as high-accuracy.
Turnitin
Use it for schools and universities already using Turnitin coursework workflows.
Related Comparisons
Keep comparing adjacent tools before you pick a workflow.
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.
GPTZero vs Turnitin
GPTZero is self-serve with a free tier; Turnitin only exists inside a school's paid subscription.
Slop or Not vs Pangram
Pangram cites real university research behind its 99.98% accuracy number, but it's text-only, and the free plan caps at 4 credits a day sent through Pangram's cloud.
Pangram vs GPTZero
Pangram sells its cited accuracy number; GPTZero sells its classroom integrations.
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.
