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
Sightengine vs Reality Defender: AI Detector (2026)
Sightengine stays self-serve: a permanent free tier, an API key, no sales call required to start checking images. Reality Defender goes further into audio and video, but that reach comes with a 50-scan free ceiling and a handoff to sales once real usage starts.
Sightengine is a developer-focused image moderation API with a permanent free tier of 2,000 operations per month; it detects AI-generated images and deepfakes and reads C2PA and EXIF metadata. Reality Defender is an enterprise deepfake platform covering image, audio, and video, built for fraud prevention and identity workflows at scale; access beyond 50 free scans requires a sales engagement. Slop or Not handles on-device AI detection for text and images on iPhone and Mac, without an API 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 | Sightengine | Reality Defender |
|---|---|---|---|
| Best fit | On-device iPhone and Mac checks or free browser checks for text and images | Developers adding AI media detection and moderation through an API | Deepfake detection for fraud, identity, calls, meetings, and security workflows |
| Text detection | Checks writing in the native app and online checker | No Sightengine is image-only; it doesn't detect AI-generated text | Homepage references text plus image in enterprise authenticity framing |
| Image detection | Checks photos, synthetic images, and provenance clues in the app or online checker | AI Image Detection is listed for detecting AI-generated images | RealAPI supports image, audio, and video files |
| Deepfake detection | Covers deepfake and synthetic-image checks as image detection | Deepfake Detection is listed for face swaps and AI manipulation | Deepfake detection platform and API for manipulated media |
| Metadata and provenance signals | Reads SynthID, C2PA, and IPTC signals in native and online image checks when a file carries them | C2PA Checker and EXIF & Metadata Viewer are listed | 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 | API model capabilities and operation counts are documented | Results include manipulation probability scores and explainable indicators |
| Browser checker | Free online checker runs in any browser on Numen's private Mac server; submissions are deleted after processing | Not publicly clear | RealScan SaaS web platform supports drag-and-drop analysis |
| 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 | API documentation and API keys are listed | RealAPI supports SDKs for Python, TypeScript, Go, Rust, and Java |
| Classroom workflow | Useful for checking student writing on-device in the app or through deleted-after-processing online checks | Not publicly clear | 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 tier lists 2,000 operations per month with a 500 per day maximum | Free API access includes 50 audio or image scans per month |
| 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 policy covers subscriber-submitted data sent to the API for analysis, and its security page says Enterprise customers can request immediate deletion after processing; the default retention period on other plans is not stated | RealAPI describes secure media upload and structured JSON results |
| Main limitation | On-device privacy requires iPhone or Mac; browser checks run on Numen's private Mac server, not on-device | API-first tool; paid plans meter operations | Security and deepfake workflow, not a student essay detector |
✓ = supported, ✕ = not offered, – = not publicly documented. Details reviewed June 2026 from public product, pricing, documentation, and benchmark pages.
Where Slop or Not Fits
Sightengine never looks at text, and Reality Defender's free tier runs dry after 50 scans a month. Slop or Not checks text and still images on-device, free, with limited daily checks and no sales call waiting at the end of it.
- 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.
Sightengine
Use it for developers adding visual moderation and AI media checks to an app.
Reality Defender
Use it for security teams that need deepfake detection in fraud, access, and communications workflows.
Related Comparisons
Keep comparing adjacent tools before you pick a workflow.
Slop or Not vs Sightengine
Sightengine reads C2PA and EXIF metadata alongside its AI-image and deepfake detection, but it's API-only, capped at 2,000 free operations a month, and it never checks text.
Slop or Not vs Reality Defender
Reality Defender detects deepfakes across image, audio, and video with SDKs for five languages, but the free tier tops out at 50 scans a month before it turns into a sales conversation.
AI or Not vs Sightengine
AI or Not covers five media types behind one key; Sightengine stays image-only but keeps a permanent free tier.
Hive Moderation vs Reality Defender
Hive Moderation screens everything at platform scale; Reality Defender specializes in deepfakes for security teams.
Hive Moderation vs Sightengine
Sightengine offers a card-free permanent free tier; Hive Moderation gates its credits behind a payment method.
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.
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.
