ScanSkinAI vs CosDNA vs INCI Decoder: Honest Comparison (2026)

Feature Comparison Table

ScanSkinAI: Best All-in-One Risk Scanner

ScanSkinAI's free ingredient checker is the only tool that combines comedogenic ratings, allergen detection, and irritant flagging in a single scan. It also accepts camera photos of ingredient labels — paste or snap, and you get a complete risk report in seconds.

Best for: Quick risk screening before buying products. Acne-prone, sensitive, or eczema-prone skin types who need to watch for multiple trigger categories.

Limitations: Less detailed ingredient education than INCI Decoder. Doesn't offer batch analysis of multiple products at once.

CosDNA: The OG Comedogenic Database

CosDNA has been the go-to ingredient checker for the skincare community since the early 2010s. It provides comedogenic and irritant ratings for individual ingredients and lets you search by product name or paste an ingredient list.

Best for: Cross-referencing comedogenic ratings if you want a second opinion. The community has used it for years, so you'll find forum discussions referencing CosDNA scores.

Limitations: Dated interface, no mobile optimisation, no allergen detection, no camera scanning. Development appears minimal — the UI and database haven't been meaningfully updated in years. Irritant scoring is limited compared to dedicated databases.

INCI Decoder: Best for Learning

INCI Decoder takes a different approach: it focuses on educating you about what each ingredient does rather than flagging risk. Each ingredient gets a detailed explanation of its function, common uses, and safety profile.

Best for: Understanding what's in your products. Building ingredient literacy. Learning why a product contains a specific ingredient.

Limitations: Doesn't provide comedogenic ratings, so it won't tell you if an ingredient clogs pores. Allergen and irritant flagging isn't comprehensive. Premium features require a subscription.

What About EWG Skin Deep and Think Dirty?

These tools answer a fundamentally different question. EWG Skin Deep and Think Dirty evaluate toxicological safety — endocrine disruptors, potential carcinogens, environmental impact. They don't assess dermatological outcomes like pore-clogging or skin irritation.

If your concern is "will this break me out?" or "will this irritate my eczema?" — use ScanSkinAI or CosDNA. If your concern is "does this contain potential carcinogens?" — use EWG.

Our Recommendation

Use ScanSkinAI as your primary screening tool — it catches the widest range of skin-relevant issues in one free scan. When the checker flags an unfamiliar ingredient, look it up on INCI Decoder to understand what it does and why it might be problematic. Use CosDNA for a second opinion on comedogenic ratings when you're on the fence about a product.

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