One Is Free, One Costs Money. Does It Matter? ImageDetector vs Is It AI

The image you're looking at right now might not be real.

Not in a philosophical sense. In a practical one. The profile picture on that LinkedIn recruiter, the product photo on that marketplace listing, the news image that got shared 40,000 times before anyone asked a question about it. 

Any of them could have been generated in thirty seconds.Midjourney, DALL-E, Gemini. These aren't niche toys anymore. 

The problem isn't that AI images exist. The problem is that most people can't tell the difference anymore, and the gap between what AI generates and what a phone camera captures is closing faster than the tools built to detect it.

Two platforms trying to close that gap are ImageDetector and Is It AI. Both are built for the same job: look at an image and tell you whether a human or a machine made it.

One of them does that job better than the other. 

What Is ImageDetector?

ImageDetector is a completely free AI image detection tool that analyzes photos for signs of artificial intelligence without requiring an account, a credit card, or a login. 

It works by examining visual signals directly in the image itself, things like texture patterns, noise behavior, and structural details, rather than relying on metadata or watermarks..

It covers the major generators: DALL-E, Gemini, Midjourney, Stable Diffusion, Flux, Ideogram, and Bing Image Creator. 

Beyond fully synthetic images it also handles deepfakes, edited photos, and AI-enhanced visuals.

What Is Is It AI?

Is It AI is an AI image detector that goes further than a simple AI/human verdict. It identifies which specific model likely made it, whether that's Midjourney v6, DALL-E 3, Stable Diffusion, Adobe Firefly, Flux, or any of the 20+ generators it covers. 

It also layers in NSFW detection alongside AI identification, which makes it more useful for platforms running content moderation at scale rather than just one-off checks. 

A Chrome extension lets users right-click any image in their browser and run a check without manually uploading anything.

Pricing is straightforward::

• Free: 5 detections per month with an account, or 3 without signup
• Starter: $1.99/month (billed annually) for 30 detections
• Basic: $7.99/month (billed annually) for 150 detections
• Growth: $46.99/month (billed annually) for 1,000 detections
• Credit packs available from $0.99 for 10 credits, valid for 3 months

A Quick Note on Privacy.

ImageDetector states it does not store images after analysis and saves minimal metadata, which puts it on the more privacy-protective end of the spectrum for free tools.

Is It AI acknowledges in its FAQ that images may be retained anonymously for model improvement, though not linked to any account. 

If you're running sensitive content through either tool at volume, reviewing their full privacy policies before proceeding is worth the five minutes.

The Test Setup

We ran six tests built around the scenarios that actually come up when someone needs to verify an image in the real world, not just the obvious cases.

Test 1: A fully AI-generated image from ChatGPT (DALL-E)

Test 2: A fully AI-generated image from Gemini

Test 3: A fully AI-generated image from Midjourney

Test 4: A real, unedited photograph

Test 5: A real photograph that was edited using AI tools

Test 6: An image pulled directly from a social media post

The first three establish the baseline.Getting the obvious ones right is the floor. The last three tests are where actual performance separates.

AI Image Detection Results: ImageDetector vs Is It AI

Test 1: ChatGPT (DALL-E)

ImageDetector: Correctly Flagged the Image as AI Generated
AI Likelihood Score: 99%

Is It AI: Correctly Flagged the Image as AI Generated
AI Likelihood Score: 99%

Test 2: Gemini (Nano Banana)

ImageDetector: Correctly Flagged the Image as AI Generated
AI Likelihood Score: 99%

Is It AI: Correctly Flagged the Image as AI Generated
AI Likelihood Score: 99%

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Test 3: Midjourney

ImageDetector: Correctly Flagged the Image as AI Generated
AI Likelihood Score: 99%

Is It AI:Correctly Flagged the Image as AI Generated
AI Likelihood Score: 83%

Test 4: Real Photograph (Unedited)

ImageDetector: Correctly Identified the Image as Real
AI Likelihood Score: 3%

Is It AI: Correctly Identified the Image as Real
AI Likelihood Score: 0%

Test 5: Edited Photograph

ImageDetector: Did not flag the digital alterations
AI Likelihood Score: 3%

Is It AI: Did not flag the digital alterations
AI Likelihood Score: 0%

Test 6: Social Media Image

ImageDetector: Correctly Identified the Image as Real
AI Likelihood Score: 3%

Is It AI: Correctly Identified the Image as Real
AI Likelihood Score: 0%

Score Summary

Test	ImageDetector	Is It AI
#1 ChatGPT Image	99%	99%
#2 Gemini Image	99%	99%
#3 Midjourney Image	99%	83%
#4 Real Photo	3%	0%
#5 Edited Photo	3%	0%
#6 Social Media Image	3%	0%
Correct Verdicts	5/6	5/6

My Final Thoughts

Both tools finished with five out of six correct verdicts, and that score deserves some honest unpacking before drawing any conclusions.

The shared miss was Test 5, the edited photograph. This wasn't a subtle touch-up. The image had parts removed (the two fruits on the vegetable tray) and the brightness significantly altered. 

Neither tool flagged it and it's worth noting for anyone who needs a detector specifically for manipulated images rather than fully synthetic ones. 

These tools are built to catch AI generation. Catching human-directed editing of real photos is a different problem, and this test exposed that limit clearly on both sides.

What does move the needle between them is Test 3. On the Midjourney image, ImageDetector returned 99% confidence while Is It AI came in at 83%. Both called it correctly.. 

But ImageDetector returned higher confidence scores on that specific generator.The real photos and social media image behaved cleanly on both tools. 

Scores at or near zero across Tests 4 and 6 means neither tool is manufacturing false positives on legitimate photographs, which is exactly what you want.

So here's where we land. ImageDetector is the stronger practical choice, and the reason is straightforward. 

It matched Is It AI verdict-for-verdict across every test, posted higher confidence on the Midjourney image, and does all of it for free with no monthly cap. That's a hard argument to make when the free alternative keeps up at every step.

Is It AI's extras, model identification, NSFW detection, and the Chrome extension, are real features with real use cases. 

But those are workflow conveniences. On the core job these tools are built for, ImageDetector held its own and arguably did the job better at least on this test.