Mainframe Modernization Partners: AWS vs Azure vs GCP Migration Paths

Published: 10/10/2026

A CTO/CIO guide to the migration strategies that actually work, how the three hyperscalers differ, and how to choose a partner for one of the highest-risk projects you will ever run.

Few IT decisions carry more weight, or more risk, than moving off the mainframe. The workloads still running on it are usually the ones the business cannot afford to break: core banking, insurance policy engines, government records, airline reservations. They have run for decades, the people who wrote them have often retired, and the cost of getting the migration wrong is measured in outages your customers notice.That combination, high stakes and scarce expertise, is exactly why the partner you ...