Verdict
Decopy ranks #10 among tested AI detectors with an overall accuracy of 65.4% across 1122 images. It performs strongest against Z-Image Base images (100% detection rate) but struggles with Wan v2.6 content (only 0% detected). With a 6.8% false positive rate, it occasionally flags real photos as AI-generated.
Hardest to Detect Models
AI models with the lowest detection rate by Decopy.
Arena Performance
Detection by AI Model
Benchmark Methodology
Decopy was evaluated on a curated dataset of 1122 images across 19 AI image generators and 5 watermark types, including models like Midjourney, Stable Diffusion, DALL-E 3, Flux, and others. The dataset also includes real photographs from verified sources to measure false positive rates.
All detectors are tested under identical conditions using the same images. We record each detector's classification (AI or Real) and confidence score, then compute three key metrics: Accuracy (percentage of correct predictions), False Positive Rate (real images incorrectly flagged as AI), and False Negative Rate (AI images missed by the detector).
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See the Difference
Drag the slider to compare before and after. AI watermarks removed, quality preserved.
Portrait Photo
Street Photography
AI Art
Digital Illustration
What is Decopy?
Decopy is an AI content detection platform specializing in identifying AI-generated and manipulated images. The service focuses on authenticity verification, helping users determine whether visual content is original, AI-generated, or potentially plagiarized.
Unlike general-purpose AI detectors, Decopy emphasizes copyright and authenticity use cases, making it particularly relevant for content creators, publishers, and platforms concerned with original content verification.
How Decopy Works
Decopy employs multiple detection technologies:
AI Generation Detection
- Deep learning classifiers trained on millions of AI and real images
- Artifact analysis identifying patterns left by generative models
- Statistical fingerprinting comparing image characteristics to known distributions
Manipulation Detection
- Splicing detection finding composited elements from different sources
- Clone detection identifying copied and pasted regions
- Metadata analysis examining EXIF and other embedded data for inconsistencies
Similarity Search
- Reverse image search finding visually similar content across the web
- Partial matching detecting when AI-generated elements are combined with real photos
Key Features
Multi-Layer Analysis
Decopy doesn't just check if an image is AI-generated - it provides comprehensive authenticity analysis including manipulation detection and similarity checking.
Detailed Reports
Results include confidence scores, flagged areas of concern, and explanations of what triggered detection signals.
Batch Processing
API users can process multiple images for efficient large-scale content screening.
Integration Options
Decopy offers API access for integrating detection capabilities into existing workflows and platforms.
Accuracy Metrics
Based on available benchmarks, Decopy achieves:
- 78-86% accuracy on standard AI-generated images
- 72-80% accuracy on newer AI models
- 85-90% correct identification of real photographs
- 70-82% manipulation detection accuracy
Accuracy varies based on image quality, AI generator used, and amount of post-processing.
Use Cases
- Publishing industry - Verifying submitted images are original
- Stock photography - Screening uploads for AI content
- Academic submissions - Checking visual content authenticity
- Brand protection - Identifying unauthorized AI reproductions
- Legal documentation - Verifying image authenticity for evidence
Pricing and Access
Decopy typically offers:
- Free tier - Limited checks for evaluation
- Subscription plans - Regular volume usage
- Enterprise API - High-volume integration
Limitations
- Detection accuracy decreases with heavily edited content
- May not detect all manipulation types equally well
- Newer AI generators may evade detection initially
- False positives possible on heavily stylized real photos
- Processing time varies with image complexity
How Decopy Compares
Decopy differentiates itself through its focus on authenticity and copyright use cases rather than pure AI detection. While services like Hive and SightEngine may offer higher raw AI detection accuracy, Decopy's combination of generation detection, manipulation analysis, and similarity search provides a more comprehensive authenticity toolkit.
Our Testing Results
We've evaluated Decopy against various AI generators and real photograph datasets. View our detailed benchmark comparisons to see how Decopy performs in accuracy, speed, and reliability across different content types.
Frequently Asked Questions
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