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Proofcan and Google SynthID.

Google DeepMind describes SynthID as a tool that embeds digital watermarks directly into AI-generated content, with a SynthID Detector verification portal. Everything on this page about Google SynthID comes from its own site; everything about Proofcan comes from Proofcan’s own product pages.

What each publishes

What it does

Google SynthID

Embeds digital watermarks directly into AI-generated images, audio, text or video.

“SynthID embeds digital watermarks directly into AI-generated images, audio, text or video.” · SynthID - Google DeepMind

Says the watermark is added the moment content is created and designed to stand up to cropping, filters, frame-rate changes and lossy compression.

“It’s added the moment content is created, and designed to stand up to modifications like cropping, adding filters, changing frame rates, or lossy compression.” · SynthID - Google DeepMind

Proofcan

A C2PA manifest declaring the image as AI-generated, an invisible TrustMark watermark carrying a lookup ID, and a registry record.

Verification

Google SynthID

The SynthID Detector portal scans uploaded media for a SynthID watermark (blog post dated 20 May 2025).

“The portal scans the uploaded media and detects whether the uploaded content, or specific portions of it, contain a SynthID watermark.” · SynthID Detector: Identify content made with Google's AI tools (Google blog, 2025-05-20)

Proofcan

Anyone can verify a marked image on proofcan.com without an account.

Media

Google SynthID

Images, audio, text and video.

“SynthID embeds digital watermarks directly into AI-generated images, audio, text or video.” · SynthID - Google DeepMind

Proofcan

Images only (PNG, JPEG, WebP), up to 50 MB each and 25 per batch. No video, audio or text.

How it is offered

Google SynthID

SynthID Text is open sourced for developers (ai.google.dev).

“SynthID Text has been open sourced to make watermarking for text generation available to developers.” · SynthID: Tools for watermarking and detecting LLM-generated Text | Google AI for Developers

The Detector was rolling out to early testers in May 2025 before broader availability.

“We are starting to roll this out to early testers today, before making it available more broadly.” · SynthID Detector: Identify content made with Google's AI tools (Google blog, 2025-05-20)

Proofcan

Self-serve web application; Free, Starter, Pro and Agency plans.

Integrations

Google SynthID

Watermarks are embedded across Google’s generative AI consumer products.

“The watermarks are embedded across Google’s generative AI consumer products” · SynthID - Google DeepMind

Proofcan

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Limits of this comparison

  • We found no published pricing and no C2PA or certification statement on the SynthID pages we read.
  • The Detector blog post is dated 20 May 2025; its current availability is not confirmed.
  • SynthID is applied by Google to content made with Google’s own models; this page does not claim it is a service for marking content from other tools.
  • What Proofcan lacks: Proofcan does not cover video, audio or text, and its C2PA conformance application is still in progress.

Different starting points

SynthID, as described by Google, marks content generated by Google’s AI products. Proofcan marks images that you generate with any tool and upload to it, adding a C2PA manifest, its own watermark and a registry record.

Visit Google SynthID at deepmind.google/models/synthid/ to check what it offers today.

Questions

What does Google SynthID say it does?
Google DeepMind describes SynthID as a tool that embeds digital watermarks directly into AI-generated content, with a SynthID Detector verification portal.
What does Google SynthID publish about pricing?
We found no published price on the Google SynthID pages we read. Proofcan: Published: Free (5 marks a month), EUR 29, EUR 99 and EUR 199 a month for 100, 400 and 1,000 marks.
What does Proofcan not do?
Proofcan does not cover video, audio or text, and its C2PA conformance application is still in progress.

This page reports what the cited sources say on the date shown. It is not an assessment of anyone’s product, it is not legal advice, and Proofcan does not guarantee compliance. Spotted something out of date? Write to support@proofcan.com.

Sources

Page reviewed . Proofcan is a technical tool, not legal advice, and does not guarantee compliance.