AI content detection
SynthID Detector: review, pricing, data and alternatives
SynthID Detector searches for SynthID watermarks for people checking images, audio files, or videos. It identifies watermarked sections and content originating from partner generators through these watermark checks. A free tier exists. Access and transparency score: 43/100, #9 of 9 in its category.
| Access | 15/30 | |
|---|---|---|
| Openness | 0/30 | |
| Trust | 28/40 |
What is SynthID Detector?
SynthID Detector searches for SynthID watermarks for people checking images, audio files, or videos. It identifies watermarked sections and content originating from partner generators through these watermark checks.
According to its documentation, SynthID Detector lets you:
- search for a SynthID watermark in an image
- check audio and video files
- identify watermarked sections
- identify content from partner generators
We file it under AI content detection, the category of tools to check whether content is AI-made. The category lists 9 verified tools on this site.
The publisher is Google LLC, based in United States. The service launched in 2025.
Who is it for?
It is mostly useful to these profiles: researchers, social media managers, and video creators. The need it covers is simple to state: check whether content is AI-made.
SynthID Detector is a good candidate if:
- you want to try before paying
The best test is a concrete case from your daily work: if the tool does not beat your current method within a week, move on to an alternative.
How much does SynthID Detector cost?
Pricing model: free. Basic use costs nothing.
To estimate what the same work would cost done directly with an AI model, use our API price calculator. Prices change often: always check the official site before subscribing.
Data and privacy
According to its privacy policy, data is processed in several regions depending on the plan.
No export feature is documented: keep a copy of your content elsewhere.
Three habits apply to every AI tool:
- turn off the use of your content for training if the option exists
- use a work account separate from your personal account
- review everything the tool produces before publishing or sending it
Platforms, languages and API
SynthID Detector runs on: web browser.
Interface languages: English.
API availability is not documented.
How we scored it
Our 43/100 score does not judge output quality: it measures what can be publicly verified about access to the tool, its openness and how far the publisher can be trusted.
| Criterion | Points | What counts |
|---|---|---|
| Access | 15/30 | free tier, published price, French interface |
| Openness | 0/30 | API, data export, open code |
| Trust | 28/40 | identified publisher, declared hosting, age, presence in reference lists |
The full calculation is explained on our method page.
Comparison with alternatives
SynthID Detector against other tools in the aI content detection category:
| Tool | Free | Entry price | API | Score |
|---|---|---|---|---|
| SynthID Detector | Yes | not published | – | 43 |
| ZeroGPT | Yes | not published | Yes | 73 |
| Compilatio | Yes | €4.99 one-off payment | Yes | 70 |
| GPTZero | Yes | not published | Yes | 68 |
| Copyleaks | Yes | $167.88 per year | Yes | 65 |
| Originality.ai | Yes | $12.95 per month | Yes | 65 |
| Content Credentials Verify | Yes | not published | – | 63 |
| Resemble AI | Yes | $0 pay as you go | Yes | 61 |
Verdict
SynthID Detector publishes little verifiable information: look at the better-scored alternatives first.
Strengths
- Free tier to try it
Limitations
- Data export not documented
Avoid if…
- You need to easily retrieve your full history
Alternatives
- ZeroGPTfree tier
- Compilatiofree tier
- GPTZerofree tier
- Copyleaksfree tier
- Originality.aifree tier
- Content Credentials Verifyfree tier
Categories and jobs
Learn more
Frequently asked questions
Is SynthID Detector free?
Yes, a free plan exists, with usage limits.
Where is SynthID Detector data stored?
According to the publisher, in several regions depending on the plan.
Does SynthID Detector have an API?
It is not documented.
What are the alternatives to SynthID Detector?
In the same category: ZeroGPT, Compilatio, GPTZero, and Copyleaks.
SynthID Detector or ZeroGPT: which one to choose?
Our score is 43/100 for SynthID Detector and 73/100 for ZeroGPT. Try both on the same task before paying.
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Neutrality. No affiliate links. No vendor pays to be reviewed, rated or ranked. Reviews are directed by François Chollet, neutral and factual, and every data point is dated and sourced. How we score