CHECKHC VS Diffyn

CHECKHC's answer

CheckHC is the only platform that combines in a single click:

• AI deepfake detection - Verify your content is authentic
• C2PA certification - Official industry standard (we're a member)
• Solana blockchain - Immutable proof of ownership
• Arweave storage - 200+ years permanent preservation
• GDPR compliance option - Unique "Flexible" NFT with deletion rights

No competitor offers all of this. OpenSea has no AI, no C2PA, no permanent storage. Truepic is B2B only at $$$. Reality Defender has no blockchain, no NFT.

CheckHC = digital birth certificate for your creations, from €0.09.

Diffyn's answer:

Addresses workflow and change management on LLM prompts, provide teams with traceability and visualization of tests across multiple models, provide deeper understading into efficiency of these prompts.

CHECKHC's answer

CheckHC is the only consumer solution combining AI deepfake detection, official C2PA certification, blockchain registration, and permanent Arweave storage (200+ years) in one click.

• All-in-one: Competitors offer pieces (OpenSea = NFT only, Truepic = C2PA only). CheckHC combines everything.
• Real minting: Unlike OpenSea's "lazy mint," CheckHC actually mints your NFT on Solana immediately.
• GDPR compliance: Unique "Flexible" option allows content deletion for European regulations.
• 90% creator royalties: Higher than Foundation (85%) and SuperRare (85%).
• Affordable: Document certification from €0.09, photo with AI from €2.70, full NFT from $38.50.

Diffyn's answer:

Diffyn is the platform that specializes on both change management and multi-model analysis.

CHECKHC's answer

• Next.js - React framework for frontend
• Solana - Fast, low-cost blockchain for NFT minting
• Arweave - Permanent storage (200+ years guaranteed)
• Custom AI model - Deepfake detection
• C2PA standard - Coalition for Content Provenance and Authenticity certification

Diffyn's answer:

React, Next.js, POSTGRESQL

CHECKHC's answer

• Professional photographers protecting their work from theft and AI manipulation
• Digital artists & NFT creators wanting permanent, verified ownership with high royalties
• Content creators & journalists needing proof of authenticity in the deepfake era
• Inventors & entrepreneurs protecting patents and ideas affordably
• Legal professionals & businesses requiring blockchain-based notarization at a fraction of traditional costs

Diffyn's answer:

Professionals incorporating LLMs or AI tools in their workflow and wants to keep track of changes and test their prompts.

CHECKHC's answer

CheckHC was born from a simple observation: in a world flooded with AI-generated content and deepfakes, proving authenticity is becoming impossible.

Founded in France, CheckHC gives creators a simple, affordable way to certify their digital content before it gets stolen or manipulated. We believe every valuable digital content will soon need a "birth certificate" - and CheckHC provides exactly that.

Our mission: make digital authenticity accessible to everyone, not just corporations with enterprise budgets.

Diffyn's answer:

I started working on Diffyn when I notice that prompting has become an essential part of work across many industries. While there are version control platofrms like github, they are not designed for just prompt management are can be overkill such applications, it is also not integrated natively with various LLMs and relevant tools for users to validate ideas and visualise results properly.

CHECKHC's answer

CheckHC just launched publicly in January 2026. We're currently onboarding our first customers:

• Independent photographers and digital artists
• Small creative agencies
• Content verification early adopters

We're offering special early-adopter pricing for professionals who want to be among the first to protect their digital assets.