Witness vs Reality Defender
Reality Defender is built for organizations that detect deepfakes in audio, video and images, identify AI callers, and add detection to live calls, meetings and applications. 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 Reality Defender 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 Reality Defender at a glance
| Witness | Reality Defender | |
|---|---|---|
| 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 | Organizations that detect deepfakes in audio, video and images, identify AI callers, and add detection to live calls, meetings and applications (contact center fraud, hiring, identity, media verification). |
| Media covered | Image and video. Voice is an experimental beta | Image, Video, Audio |
| Free option | Try a few scans with no account. A free account includes 20 image scans a month | yes: RealAPI Free plan, $0/month, 50 image scans per month, up to 3 seats; audio and video are on paid plans (audio trial via sales). |
| Pricing | Free, Pro at $15 a month ($10 a month billed annually at $120), and custom Enterprise | RealAPI Free $0/month; RealAPI Business $399 (labelled 'Annual Billing'); RealAPI Enterprise Custom pricing |
| API | Yes, see the API docs | yes |
| Browser extension | Yes, Chrome extension | Not stated on their 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 |
Reality Defender details were read from the vendor's own pages on 2026-11-13. Check their site for current information.
Which one fits you
Pick Reality Defender if
- Your use matches: organizations that detect deepfakes in audio, video and images, identify AI callers, and add detection to live calls, meetings and applications
- 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
Reality Defender at a glance
Taken from Reality Defender's own pages on 2026-11-13. Check their site for current details.
Built for
Organizations that detect deepfakes in audio, video and images, identify AI callers, and add detection to live calls, meetings and applications (contact center fraud, hiring, identity, media verification).
Pricing as listed
RealAPI Free $0/month; RealAPI Business $399 (labelled 'Annual Billing'); RealAPI Enterprise Custom pricing
Free option
yes: RealAPI Free plan, $0/month, 50 image scans per month, up to 3 seats; audio and video are on paid plans (audio trial via sales).
API and extension
API: yes. Extension: Not stated on their 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 Reality Defender free?
Reality Defender says: yes: RealAPI Free plan, $0/month, 50 image scans per month, up to 3 seats; audio and video are on paid plans (audio trial via sales). Check their site for current terms. Witness lets you try a few scans with no account.
How much does Reality Defender cost?
As listed by the vendor on 2026-11-13: RealAPI Free $0/month; RealAPI Business $399 (labelled 'Annual Billing'); RealAPI Enterprise Custom pricing. Confirm on their site.
Does Reality Defender have an API or browser extension?
API: yes. Browser extension: Not stated on their page. Witness has a Chrome extension and an API.
What is the difference between Witness and Reality Defender?
Reality Defender describes itself as built for organizations that detect deepfakes in audio, video and images, identify AI callers, and add detection to live calls, meetings and applications. Witness is built for quick, plain-language checks of images and video in the browser or by API.
Is Reality Defender 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 Reality Defender free?
Reality Defender says: yes: RealAPI Free plan, $0/month, 50 image scans per month, up to 3 seats; audio and video are on paid plans (audio trial via sales). 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
- realitydefender.com/ read 2026-11-13
- realitydefender.com/pricing read 2026-11-13
- realitydefender.com/product/realapi 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 Reality Defender
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.