Witness vs Undetectable AI
Undetectable AI is built for an AI writing suite that also offers an AI Image Detector for checking whether an uploaded image is real or AI-generated. Witness is built for quick, plain-language checks of images and video. Here is how they differ, using each vendor's own public pages.
Choose Undetectable AI if your needs match what it says it is built for. Choose Witness if you want a quick check in the browser or by API with a heatmap and a plain-language explanation. Neither can prove an image is real or fake.
Witness and Undetectable AI at a glance
| Witness | Undetectable AI | |
|---|---|---|
| Built for | People and teams who want a quick, plain-language check of whether an image or video is likely AI-generated or face-swapped, in the browser or by API | An AI writing suite (humanizer, detector, essay writer and others) that also offers an AI Image Detector for checking whether an uploaded image is real or AI-generated. |
| Media covered | Image and video. Voice is an experimental beta | Images on the detector page (Midjourney, DALL-E, Google NanoBanana named). Site nav also links AI Voice Detector, AI Video Detector, Fake PDF, Fake Receipt and Fake ID detectors (those pages not read). |
| Free option | Try a few scans with no account. A free account includes 20 image scans a month | Pricing page: 'Start FREE Trial'; 'Free Trial is limited to 250 words' (word-based, humanizer plans). Image detector free allowance not stated on page. |
| Pricing | Free, Pro at $15 a month ($10 a month billed annually at $120), and custom Enterprise | Not listed for image detection on the pages we read. Check their site |
| API | Yes, see the API docs | Yes: API page linked in nav (https://undetectable.ai/develop); image detector page states 'API-ready for fast, scalable checks in your workflow'. |
| Browser extension | Yes, Chrome extension | Chrome extension page linked in site nav (https://undetectable.ai/chrome-extension); coverage of image detection not stated on page. |
| Provenance and explanation | Reads Content Credentials (C2PA) and checks for the SynthID watermark and metadata. Heatmap, per-frame video timeline and a plain-language explanation | See their site for current details |
Undetectable AI details were read from the vendor's own pages on 2026-11-13. Check their site for current information.
Which one fits you
Pick Undetectable AI if
- Your use matches: an AI writing suite that also offers an AI Image Detector for checking whether an uploaded image is real or AI-generated
- You need what its own pricing page offers, such as the plans listed above
- You want to compare more than one detector before deciding
Pick Witness if
- You want a quick answer in the browser with a Chrome extension
- You want a heatmap and a plain-language explanation
- You want provenance and watermark checks in the same result
Undetectable AI at a glance
Taken from Undetectable AI's own pages on 2026-11-13. Check their site for current details.
Built for
An AI writing suite (humanizer, detector, essay writer and others) that also offers an AI Image Detector for checking whether an uploaded image is real or AI-generated.
Pricing as listed
Not listed for image detection on the pages we read. Check their site
Free option
Pricing page: 'Start FREE Trial'; 'Free Trial is limited to 250 words' (word-based, humanizer plans). Image detector free allowance not stated on page.
API and extension
API: Yes: API page linked in nav (https://undetectable.ai/develop); image detector page states 'API-ready for fast, scalable checks in your workflow'.. Extension: Chrome extension page linked in site nav (https://undetectable.ai/chrome-extension); coverage of image detection not stated on page..
Read this before relying on any detector
- Witness reports a likelihood with a confidence score. It does not prove anything on its own.
- No detector catches every image. New generators can be missed until detection catches up, and heavy compression or screenshots can lower confidence.
- A real photo can be flagged and an AI image can pass. Treat a result as one input, alongside the source, context and other checks.
Frequently asked questions
Is Undetectable AI free?
Undetectable AI says: Pricing page: 'Start FREE Trial'; 'Free Trial is limited to 250 words' (word-based, humanizer plans). Image detector free allowance not stated on page. Check their site for current terms. Witness lets you try a few scans with no account.
How much does Undetectable AI cost?
As listed by the vendor on 2026-11-13: Not listed for image detection on the pages we read. Check their site. Confirm on their site.
Does Undetectable AI have an API or browser extension?
API: Yes: API page linked in nav (https://undetectable.ai/develop); image detector page states 'API-ready for fast, scalable checks in your workflow'.. Browser extension: Chrome extension page linked in site nav (https://undetectable.ai/chrome-extension); coverage of image detection not stated on page.. Witness has a Chrome extension and an API.
What is the difference between Witness and Undetectable AI?
Undetectable AI describes itself as built for an AI writing suite that also offers an AI Image Detector for checking whether an uploaded image is real or AI-generated. Witness is built for quick, plain-language checks of images and video in the browser or by API.
Is Undetectable AI more accurate than Witness?
No independent, apples-to-apples comparison exists, and vendor-reported accuracy numbers use different test sets. Test both on your own images.
Is Undetectable AI free?
Undetectable AI says: Pricing page: 'Start FREE Trial'; 'Free Trial is limited to 250 words' (word-based, humanizer plans). Image detector free allowance not stated on page. Check their site for current terms.
How much does Witness cost?
Witness has a free tier, Pro at $15 a month ($10 a month billed annually), and custom Enterprise plans. See the pricing page for current limits.
Sources
- undetectable.ai/ai-image-detector read 2026-11-13
- undetectable.ai/pricing read 2026-11-13
Competitor details come from each vendor's own public pages on the dates shown. Products change, so check the vendor's site before you decide.
More on Undetectable AI
Don't guess. Witness it.
Free to try. No account needed for your first scans. Witness gives a likelihood with a confidence percentage, not a certainty.