Slop or Not
Use it for people who want native Apple checks or the free online checker for text, images, and provenance clues.
vs
AI Detector
Copyleaks vs Turnitin: AI Detector (2026)
Copyleaks suits a teacher or department that wants to try detection this afternoon and wire it into an LMS later. Turnitin suits a university that already runs submissions through Turnitin and wants the AI indicator inside that same report, which is also the only way to get it.
Copyleaks and Turnitin both sell AI detection to schools, but only one lets a single teacher start today. Copyleaks scans up to 25,000 characters on its website without a login, integrates with Canvas, D2L, Moodle, Blackboard, Schoology, Edsby, and Sakai, and adds image, video, and deepfake detectors. Turnitin sells Turnitin Originality to institutions only, where it flags likely AI writing and AI paraphrasing inside the school's submission workflow. Slop or Not runs text and image checks on iPhone, iPad, and Mac on-device, with no 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 | Copyleaks | Turnitin |
|---|---|---|---|
| Best fit | On-device iPhone and Mac checks or free browser checks for text and images | Content integrity suite for education, enterprise, developers, and publishers | Institutional academic integrity workflows |
| Text detection | Checks writing in the native app and online checker | AI text detector with model coverage and multilingual support | AI writing and paraphrasing detection inside Turnitin Originality |
| Image detection | Checks photos, synthetic images, and provenance clues in the app or online checker | AI Image Detector is listed in the AI Detector product menu | No |
| Deepfake detection | Covers deepfake and synthetic-image checks as image detection | AI Video Detector and Deepfake Detector are listed | 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 | AI Logic, AI phrases, source match, highlights, and reports are described | 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, not a third-party AI provider's | Browser extension and Google Docs add-on are listed | 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 | Enterprise AI detection via API 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 the free online checker | LMS integration for Canvas, D2L Brightspace, Moodle, Blackboard, Schoology, Edsby, and Sakai is listed | 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 word cap per document or per month. | Free web scan limit is listed as up to 25,000 characters without logging in | 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, never a third-party AI provider's. | Lists GDPR, SOC 2, SOC 3, PCI DSS, and NIST RMF references | 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 | Full sentence-level insights and enterprise integrations require account or paid workflows | 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.
Sources reviewed
Where Slop or Not Fits
Copyleaks meters its free web scan by the character, and Turnitin needs a school contract. Slop or Not's free app has a daily check limit but no word cap per document or per month, and it needs no institutional seat on iPhone, iPad, 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 Apple silicon, accelerated by the Apple Neural Engine; online checks run on Numen's self-hosted Apple hardware.
- 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 word cap per document or per month.
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.
Copyleaks
Use it for organizations that need content integrity controls across LMS, API, and browser workflows.
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 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 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 Copyleaks
GPTZero is a teacher's browser tool; Copyleaks is a district's enterprise suite with image and deepfake detection built in.
GPTZero vs Turnitin
GPTZero is self-serve with a free tier; Turnitin only exists inside a school's paid subscription.
Originality.ai vs Copyleaks
Originality.ai bills per credit for solo writers; Copyleaks bills enterprise accounts for LMS-wide integrity checks.
Pangram vs Turnitin
Pangram is self-serve with a daily free cap; Turnitin has no public access at all.
Privacy tools from the same team
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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.
