DIFFDAY CO., LTD. · EST. JANUARY 2024

Thoughtful brands.
Useful technology.

We build brands and the tools behind them. From everyday glassware to AI-powered content creation, our work connects practical experience with new possibilities.

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01 / OUR WORK

One company. Two connected perspectives.

AI CONTENT PLATFORM

CONTTO콘토

Your brand.
Its next story.

An AI-powered content creation platform for small businesses and creators. Start with a website or channel URL, then develop brand analysis, audience hypotheses, copy, images and video.

Explore CONTTO ↗

CONTTO is developed and operated by DIFFDAY CO., LTD.

CONTTOFROM CONTEXT TO CONTENT
START WITH YOUR BRANDA website. A channel.
A story worth telling.
↓
Brand contextAudience ideas
↓
AaCopy
◒Images
▷Video

Create → Review → Download

Workflow illustration
01

Grounded in the brand

Content starts with source information from the brand’s website and materials.

02

Built for everyday use

Copy, images, motion content and photo-based videos in one creative workflow.

03

People make the final call

Users review and download outputs. Direct social publishing and Meta ad registration are being prepared, pending platform app review.

FIIRN sapphire-blue KIDE glassware in natural light
EVERYDAY GLASSWARE

FIIRN피른

A little more care
in the everyday.

Our glassware brand brings considered form to everyday routines. Operating FIIRN gives us first-hand experience in product storytelling, e-commerce and brand content—the same work that informs CONTTO.

Explore FIIRN ↗
02 / COMPANY

Built from experience. Based in Korea.

The company
behind the work.

DIFFDAY CO., LTD. is a South Korean company founded in January 2024. Led by founder and CEO Austin Lee, we operate CONTTO and FIIRN.

Legal name
DIFFDAY CO., LTD.주식회사 디프데이
Established
January 2024
Business commencement
January 11, 2024
Founder & CEO
Austin Lee ↗이건희 · LinkedIn
Business registration
864-81-03211
Location
Namyangju, Republic of Korea
Company document
Business registration certificate (PDF)Public copy · registration numbers and verification codes redacted. The certificate records business commencement, not the incorporation date.
03 / GET IN TOUCH

Let’s build
what comes next.

austin@diffday.io ↗