Agentyx · AI-native software engineering
We build.We rebuild.We pr>ve it.
The software your business runs on
Modernize the mainframe and legacy systems you already depend on — proven behaviorally identical, line by line — or have brand-new software built for you, delivered tested, deployed, and under warranty.
Powered exclusively by Claude Code
What we do
Two services. One engineering standard.
Whether it's forty-year-old COBOL or software that doesn't exist yet, the deliverable is the same: working systems, proven and handed over.
Modernize what you have
Legacy & Mainframe Modernization
COBOL mainframes, AS/400 estates, aging binaries — turned into clean, modern software your team can actually maintain. We run the original and the new system side by side and prove they behave identically before anything ships.
- → Behavioral equivalence proven, program by program
- → Pay per program — $0.20 / line generated, no multi-year big-bang
- → Code-privacy standard: we can work on code we cannot read
- → Free evaluation on a sample of your own codebase
Build something new
Custom Software House
Made-for-you software at off-the-shelf prices. Pick one of 100 proven blueprints, customize the features with a live price, and receive your own system — built, fully tested, deployed, and handed over outright.
- → Fixed pricing from $500 — Small, Medium ($1,500) and Large ($3,500) systems
- → A signed Build Agreement fixes exactly what you get, before you pay
- →Free setup & deployment, full credential handover — you own it
- → 6-month warranty and a money-back guarantee
How we work
The same engineering DNA in everything we ship
Proof over promises
Modernized code ships with behavioral-equivalence evidence; new software ships fully tested end-to-end. Either way, you see the proof before you rely on it.
AI-native, deterministically applied
Powered exclusively by Anthropic's Claude Code — one model to vet, one supply chain to audit — driving deterministic engineering pipelines, not improvised copy-paste output.
Your code stays yours
Modernization can run under our code-privacy standard — we work on code we cannot read. Custom builds are handed over completely: credentials, subscriptions, ownership.
Accountable delivery
Equivalence reports and line-by-line traceability on modernization; a signed Build Agreement, free setup and a 6-month warranty on custom software. Someone is on the hook — us.
Try the platform
See it working before you talk to anyone
SteelFrame
A private mainframe-compatible environment per visitor — launch and explore in the browser.
Open →MidFrame
The AS/400-compatible sibling — a private midrange environment, one click away.
Open →Demo tools
Upload a binary and chat with the analysis — see the platform's understanding live.
Open →Secured analysis
The code-privacy standard, demonstrated: redaction in your browser, verifiable receipts.
Open →Bring us a mainframe — or an idea.
Tell us what you're running, or what you want built. We'll show you the proof before you commit to anything.