# Heirloom Computing: Mainframe Application Modernization on Every Platform

> IBM Mainframe migration solution with 5X faster modernization to Java\. Delivers cloud\-native apps with no disruption and 65\-85% cost savings\.

Generated by Yoast SEO v27.7, this is an llms.txt file, meant for consumption by LLMs.

## Pages
- [Heirloom/X](https://heirloomcomputing.com/heirloom-x/)
- [Heirloom Computing](https://heirloomcomputing.com/)
- [Insights](https://heirloomcomputing.com/insights/)
- [Case Studies](https://heirloomcomputing.com/case-studies/)
- [About](https://heirloomcomputing.com/about/)

## Posts
- [ISG Mainframe Report 2026](https://heirloomcomputing.com/isg-mainframe-report-2026/): ISG has named Heirloom Computing the multi\-platform Global Leader for Mainframe Application Modernization Software in its 2026 Quadrant Report\. Our technology modernizes mainframe workloads to native Java applications deployable on every cloud platform—on\-premise, any cloud, or IBM Z\.
- [The Abstraction Tax](https://heirloomcomputing.com/abstraction-tax/): Every decade, mainframe modernization gets a new savior\. Rules extraction, lift and shift, model\-driven generation, and now behavioral observation\. The technology changes\. The failure mode doesn't\. Every abstraction between source and target silently destroys critical information, and no observation window can capture what it cannot see\.
- [LLMs and COBOL Modernization](https://heirloomcomputing.com/llms-and-cobol-modernization/): Anthropic, Thoughtworks, AWS, and a growing number of startups are positioning AI as the answer to mainframe modernization\. LLMs are genuinely transformative for parts of the journey — and structurally unsuited to the part that matters most\. Here's where deterministic transpilation and AI each belong\.

## Floating Elements
- [Home Page Banner](https://heirloomcomputing.com/e-floating-buttons/home-page-banner/)

## Portfolios
- [Arek Oy](https://heirloomcomputing.com/portfolio/arek-oy/)
- [Avon](https://heirloomcomputing.com/portfolio/avon/)
- [OCLC](https://heirloomcomputing.com/portfolio/oclc/)
- [Venerable](https://heirloomcomputing.com/portfolio/venerable/)
- [Vitec Autosystemer](https://heirloomcomputing.com/portfolio/vitec/)

## Categories
- [TECHNICAL](https://heirloomcomputing.com/category/technical/)
- [MIGRATION](https://heirloomcomputing.com/category/migration/)
- [CLOUD](https://heirloomcomputing.com/category/cloud/)
- [SEMIOTICS](https://heirloomcomputing.com/category/semiotics/)
- [SECURITY](https://heirloomcomputing.com/category/security/)

## Portfolio Categories
- [Case Study](https://heirloomcomputing.com/portfolio_category/case-study/)

## Optional
- [Sitemap index](https://heirloomcomputing.com/sitemap_index.xml)