Startup Spotlight: Nomain Oy — Turning Mainframe Code Into Lasting Knowledge
Company Name: Nomain
Nomain turns mainframe code into structured, reliable knowledge, giving banks and insurers the clarity and control to modernize, comply, and onboard with the code as the single source of truth.
How did you come up with the idea for the business?
Our CEO & Co-founder, Henri Kasurinen, worked with multiple banks and insurers as an AI consultant and noticed the exact same problem everywhere: the senior developers who deeply understand these legacy systems are about to retire, which will leave a massive, unprecedented knowledge gap.
What achievement are you most proud of so far?
Only 18 months after establishing the company, we are already working with the largest banks and insurers in Europe.
What makes your solution different from others in the market?
Unlike traditional migration tools that assume you already understand your mainframe, Nomain Oy derives that understanding directly from the code itself. This makes the entire system clear and controllable before any decision to modernize, audit, or maintain is even made.
What problem are you solving for the industry?
The people who understand the mainframe are retiring, and the code they leave behind is becoming unreadable to everyone else; Nomain Oy closes that gap by turning the code itself into reliable, lasting knowledge.
What trend do you think will have the biggest impact on your industry over the next few years?
AI agents have made reading legacy code incredibly cheap. This shifts the whole industry's challenge from "can we read COBOL?" to "can we trust the reading?"—which is the exact question Nomain is built to answer with knowledge grounded deterministically in the code rather than guessed.
Where do you see your company in the next 3-5 years?
Deeply embedded and working at scale with top-tier banks and insurers across Europe.
If readers remember one thing about Nomain Oy, it should be:
"The experts who built your mainframe are retiring. We turn their knowledge into something that stays."
Nomain Oy website: https://www.nomain.com