NO. 01 — DATA VISUALIZATIONISSUE SEPTEMBER 2026
cleardataviz.
WHAT ELSE I BUILD

PROJECTS, I build myself

Alongside training and advising, I build things myself too. Two projects I’m proud of — one a small AI tool, the other a full learning platform.

Steef’s coach screen, where you upload a sketch for feedback
Steef’s Battle mode, comparing two sketches against each other

Steef

Data visualization coach

Steef is my own AI sparring partner for data visualization. Upload a photo of your dashboard sketch and get focused feedback within seconds — what works, what doesn’t, and why. In Battle mode you compare multiple sketches side by side to see which design holds up best.

FREE TO TRY · NO SIGN-UP · IMAGES ARE DELETED AFTER ANALYSIS

VISIT STEEF →
The opening scene of Café Stella on caffedata.com
The eight learning rooms of Caffè Data

Caffè Data

Data literacy, the craft way

Caffè Data is a graphical-literacy learning platform I built together with Stéphane de Barbanson. Through the story of Maria, owner of Café Stella, you learn to think critically about data, visualize honestly, and build analytical skills that hold up to scrutiny. Eight "rooms" each cover a different piece: from PL-300 exam prep to a community where you share your own work.

34 LESSONS · 18 INTERACTIVE CONCEPTS · 7 LANGUAGES · PL-300 CURRICULUM

Built together with Stéphane de Barbanson

VISIT CAFFÈ DATA →

WANT TO BUILD SOMETHING?

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