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Compare AI detectors

Sightengine AI image detector vs isGenAI

Sightengine’s AI image detection is pixel-only: it returns an ai_generated score from 0 to 1 and, by its own description, ignores EXIF, C2PA and watermarks. isGenAI does the opposite job. It reads the C2PA Content Credentials, IPTC labels and saved prompts in the file and never scores the pixels, so the two answer different questions and work well together.

isGenAI (isgenai.com) is not affiliated with Sightengine. Looking for Sightengine itself? Go to sightengine.com.

Facts about other products come from their own public pages as of October 2026, linked under Sources. Updated . Spotted something out of date? Send a correction.

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isGenAI and Sightengine compared

Side by side, as of October 2026. Each Sightengine cell links to the page it comes from.
QuestionisGenAISightengine
Free useFree web checker and free browser tools; no paid tier is needed to check a file.A few free checks in the web demo; the free API plan includes 2,000 operations a month (up to 500 a day). (source)
Sign-upNone. No account, no email.Needed after the demo’s free limit and for API keys. (source)
Paid plansNone needed.Starter $29 a month for 10,000 operations; Pro $99 a month; Enterprise custom. (source)
MethodReads records saved in the file: C2PA Content Credentials, the IPTC digital source type, prompts saved by AUTOMATIC1111, ComfyUI, InvokeAI or NovelAI, and EXIF or generator metadata. It never scores how the pixels look.Pixel-based model that ignores EXIF, C2PA and watermarks; it says it is robust to compression and resizing, with lower confidence on screenshots and degraded images. (source)
ResultNamed findings, each with the field it came from, or “no AI evidence found” (which means no record in that copy, not proof of a camera).An ai_generated score from 0 to 1, with optional per-generator scores. (source)
Media coveredImages (records), C2PA in video and PDF, text and code (declared use).Images and video, with face-manipulation scoring; AI voice and music are separate products. (source)
APIPOST /v1/check with a file, URL, text or code. No API key for the documented endpoints.check.json endpoint with models=genai, authenticated with an api_user and api_secret. (source)
PrivacyPrivate by default: private checks stay out of public reports, and the C2PA checker processes uploads in memory without storing them.No human reviewers; its terms say media is used for training only if a customer sends it through the Feedback API. (source)

When to use which

Choose Sightengine when

  • You need a score for images that carry no records, such as screenshots or social-media copies; Sightengine is built for exactly that.
  • You moderate high volumes and want one API that also covers video and face manipulation.
  • You want a long list of named generators in the score breakdown.

Choose isGenAI when

  • You need the evidence Sightengine deliberately ignores: who signed a C2PA manifest, what the IPTC label says, or the saved prompt.
  • You want a free check with no account and no operation counting.
  • You need to explain a result to someone else by pointing at a field in the file.
Controlled example PNG file that carries this record: Content Credentials found

test-signed.pngPNG file · controlled example

  1. Signature + IHDR
  2. iTXt XML:com.adobe.xmp
  3. tEXt parameters
  4. tEXt prompt / workflow
  5. tEXt invokeai_metadata
  6. eXIf
  7. caBX C2PA manifestrecord
  8. IDAT pixels
  9. IEND

Content Credentials found

A signed manifest describes how the file was made.

Signer, recording tool, actions and the signature check result are reported separately, so you can weigh each one.

Open the Content Credentials checker →
Content Credentials found: where this record sits inside a PNG file and what the isGenAI report says about it. The picture is a code-drawn controlled example that carries this record; download it and check it yourself.

How to do the same job with isGenAI

  1. Get the original file, ideally the download from the generator or the sender, not a screenshot or a copy re-saved by a social app.
  2. Open the free AI image detector at isgenai.com/ai-image-detector and upload the file. No account is needed.
  3. Read each finding with the field it came from: a C2PA manifest, an IPTC digital source type, a saved prompt or generator metadata.
  4. If the report says no AI evidence was found, treat that as “no record in this copy”, then look for the original source or run a pixel-based classifier if you need a probability.

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Questions

Does Sightengine read C2PA or metadata?

Its AI-image documentation says the detector is pixel-based and does not use EXIF, C2PA or watermarks (as of October 2026). isGenAI reads exactly those records, so running both covers both kinds of evidence.

Is isGenAI more accurate than Sightengine?

They do not measure the same thing, so a head-to-head accuracy number would mislead. A record isGenAI finds is a fact about the file; Sightengine’s score is an estimate that still works when records are missing.

Is there a free Sightengine alternative without sign-up?

isGenAI’s image checker is free with no account. It reports records, not a pixel score, so for record-free images you would still need a classifier.

Is isGenAI part of Sightengine?

No. isGenAI is independent and not affiliated with Sightengine or Kozelo SAS. The facts here come from Sightengine’s own pages as of October 2026.

Sources

Every statement about Sightengine comes from these pages, read as of October 2026. Products change; check the page before you rely on a detail. Product names belong to their owners and are used only to identify them.