Karel Callens

TLDR

Karel Callens is Co-founder and CEO of Luzmo (formerly Cumul.io), a Leuven-based embedded analytics platform purpose-built for SaaS companies.

Overview

Karel co-founded Luzmo with Haroen Vermylen and Thomas De Clerck. He brought over 18 years of BI and data visualization experience from senior consultant and manager roles at CSC and the Belgian Ministry of Economics. The company was originally called Cumul.io before rebranding to Luzmo.

Luzmo's platform enables SaaS companies to embed customer-facing analytics directly into their products without building custom visualization tooling. In 2024, the company launched Luzmo IQ, bringing hyper-personalized AI-driven analytics to embedded use cases. Luzmo has a partnership with Lansweeper (also Belgian) as a reference for the strength of the Flemish B2B SaaS ecosystem.

Career Highlights

• Co-founded Cumul.io/Luzmo, now a leading embedded analytics platform for SaaS companies globally
• 18+ years of BI and data visualization experience before founding Luzmo
• Regular speaker at global SaaS events including SaaSOpen and SuperNova (Antwerp)

Connections

Part of the Leuven and Flanders SaaS ecosystem. Luzmo has a technology partnership with Lansweeper, illustrating the growing network of Belgian scale-ups working together. Connected to the SuperNova Festival ecosystem.