ABOUT CALTHO
Small team.
Serious impact.
Caltho is led by John Annunziato and Mateusz Sierant. We partner directly with ambitious businesses to build digital experiences, custom systems, and work that moves the business forward.
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John Annunziato
CO-FOUNDER
Mateusz Sierant
CO-FOUNDEROUR STORY
Built from firsthand experience.
We kept seeing the same thing: businesses stuck with tools that don't talk to each other, and no one around to actually fix it.
So we started Caltho to do that work ourselves.
READY WHEN YOU ARE
Let's build something
that actually helps.
No pitch deck, no sales pressure—just a conversation about where technology could make the business work better.
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