The mainframe shouldn't keep you up at night
Every change is a gamble when nobody fully understands the system. Nomain gives your team one reliable view of how the code actually works, so you can move without holding your breath.
The founding story
Throughout our careers, we've witnessed firsthand how legacy software hinders an organization's ability to adapt, innovate, and manage technical debt.
This challenge is most acute in financial institutions, where mainframe systems dating back half a century continue to operate while the developers who built them steadily retire, taking their invaluable knowledge with them.
That observation led us to a conclusion that is at the heart of Nomain: The real challenge isn't the technology itself, but rather the gradual loss of critical institutional knowledge needed to maintain and modernize these powerful systems.
That sparked the idea of Nomain - a product that will bridge the skill gap and democratize access to knowledge about legacy systems across the whole organization.
What we believe in
Our conviction is that great systems are built and maintained by great people with great tools, who understand the system they are working on.
To us it was clear from the get-go, that our product had to be human-centered, empowering people to rediscover the lost mainframe expertise and communicate effectively across domains.
Through advanced, AI-driven features, we can make mainframe work faster, simpler, and far more fulfilling for developers and business analysts alike. The unique combination of a people-first approach and the most advanced technology is what Nomain is made of.
Differentiation
Why work with us?
Built for risk-sensitive environments
Purpose-built for long-lived, large-scale mainframe systems in banking, insurance, and government, with the level of domain understanding those environments demand for safe, continuous change.
AI-native with a deterministic foundation
Nomain grounds system understanding directly in an Abstract Syntax Three derived from your source code, giving you a deterministic, but powerful way to understand your estate. All outputs can be traced to a source and decision points - auditable, traceable, secure.
Made for business and technical users alike
Nomain creates one shared, code-derived understanding that works across every role. Business analysts, developers, architects, and risk teams all reason from the same facts.
Built in the EU
Nomain is a European company building for European institutions. The team is based in the EU, we work across the languages our customers actually operate in, and we understand the regulatory reality of running critical systems for banks and insurers here, because it is the environment we work in too. This is not a US product with a European data centre added on afterwards. The sovereignty story, the on-premises default, and the DORA alignment all follow from where and how the product was built. Hence, when you work with us, the people writing the roadmap and the people sitting across from your regulator-facing teams are working under the same rules you are.
Meet the founding team
Héctor Tortosa
Héctor has over 20 years experience in building efficient and secure software and will make sure we keep our clients safe and build a beautiful software product.
Henri Kasurinen
Henri is our AI and business development expert, with 10 years of experience in AI and a work history with Nokia and various consulting companies.
Mikko Kesti
Mikko is a serial entrepreneur with a proven track record of building a successful startup and leading it to acquisition by a multinational, publicly listed tech company.