About Supaku
The Spark That Won't Stay Still
Supaku is Mark Kropf's lab for technology that exists because it should, not because a market demanded it. Every product starts as a spark of conviction and ships as a real thing people can use.
Origin
Why “Supaku”?
The Japanese word for spark — スパーク (supāku) — became the brand. Not because of a branding exercise, but because a spark is exactly what it has always been: a burst of energy that jumps a gap, illuminates something for an instant, and sets things in motion that cannot be undone.
From a childhood nickname to djspark.com, from Spark Hosting to Inversiones Chispa, the pattern repeated across three decades. Supaku is simply the name given to what was always happening: the uncontainable impulse to build, experiment, and ship things that didn't exist before.
The Platform
What We're Building
Privacy-first products for tech professionals who want thoughtfully built tools that respect their data and their intelligence.
Yuisei
A personal CRM that treats your relationships like they matter. Privacy-safe enrichment, intentions, AI nudges.
Account
One secure identity across the ecosystem. No password fatigue, no data leakage.
Social
AI content studio trained on your voice. Coming soon.
Art
Digital art curation and gallery experiences. Coming soon.
Principles
How We Build
These aren't aspirations. They're constraints that shape every product decision.
Connect
Follow the Spark
Open source projects, founder background, and where to find us.
Tools you'd build yourself if you had the time.
No data brokering. No dark patterns. No features that exist solely to increase engagement. Just clean tools built by someone who uses them daily.