Understand your Mainframe
The token-efficient knowledge layer for legacy code,
serving humans and AI
From engineers to engineers
From engineers to engineers
Partners
Success cases
Production incident resolved without technical support
A business specialist received a ticket for an incident reporting that a period update API call had failed. He asked Nomain what to do and resolved the ticket on Nomain's suggestion to attempt a retry, without taking development team time.
Three days of manual work, 52 seconds with Nomain
A team ran an impact analysis to find which programs would be affected if the length of a field changed. The manual search took three days. They then asked Nomain, which returned the correct answer in 52 seconds.
Error-source lookup a general-purpose assistant could not complete
A developer needed to find where a screen error message originates, after a colleague had made no progress searching with a general-purpose coding assistant. Nomain returned the answer directly and the developer applied a quick fix.
From Legacy to Velocity
Ensure business continuity as your experts retire
A legacy code base is a goldmine of institutional knowledge, with decades of business logic and processes encoded in the source itself. That knowledge has only ever been accessible to the few experts who can read the code. As they retire, banks and insurers lose the only interface they had to their own logic, which forces a shift from person-dependent tribal knowledge to a structured knowledge platform that serves both humans and, increasingly, AI agents. Beyond operational efficiency, DORA makes this a regulatory requirement.
Operational stability in risk-sensitive environments
Nomain makes mainframe system behavior transparent and traceable, so your teams can modernise, maintain, and demonstrate compliance with confidence.
Faster execution, lower operating & token costs
Nomain creates a knowledge graph from the analysed source code, which constitutes an institutional memory that learns from every interaction. This creates tribal knowledge that doesn't walk out the door, but it also offers a significantly more token-efficient way to use AI. Built-in features like zombie code detection enable rapid MIPS reduction to drive operational costs down.
Safe and fast modernisation
Mainframe migration and modernisation is high-risk because the underlying estate is poorly understood. Nomain enables domain-driven modernisation: splitting the large problem into smaller pieces, establishing the meaning of each, and hence enabling controlled modernisation.
Reduced operational and regulatory risk
System understanding strengthens both regulatory resilience and operational stability by making system behavior transparent and traceable. By generating reliable, code-based system knowledge, Nomain reduces compliance risk, supports requirements such as DORA, and protects business continuity in always-on, risk-sensitive environments.
Higher stability and uptime
80% of unplanned downtime traces back to software changes whose full impact wasn't understood before deployment. Nomain delivers fast, automated impact analysis across the entire code base, so teams see exactly what a change affects before it reaches production.
Cost reduction
Nomain enables direct infrastructure savings by identifying unnecessary code and reducing MIPS consumption, enables vendor-exit by exposing how external software is integrated into the codebase, improves developer efficiency through faster and more informed execution, and supports better business decisions by making effort and impact visible before work begins.
Safer and faster modernisation
Nomain enables domain-driven modernisation: splitting the system into smaller pieces, establishing the meaning of each, and exporting that understanding into enterprise architecture tools. When system understanding is shared from the start, work flows faster and with less friction across teams, unlocking up to 3x faster development.
Unlocked AI capabilities
Built in the EU, Nomain unlocks the safe, controlled use of AI in mainframe environments. By turning code into structured, reliable system knowledge, Nomain enables AI agents and tools to access backend complexity that was previously inaccessible, while keeping teams in control with full visibility into how the system works.