Heirloom® Overview

Heirloom is a state-of-the-art software solution for replatforming online & batch mainframe workloads as 100% cloud-native Java applications.

It is a fast & accurate compiler-based approach that delivers strategic value through creation of modern agile applications using an open industry-standard deployment model that is cloud-native.

How It Works In 60 Seconds

Think you’ve heard it before? Got 60 seconds? Let us show you the Heirloom difference; watch the video below.

Try It For Yourself

You can download the Heirloom SDK via our courseware for free today. It is available on Windows, Linux, and macOS.

Fast & Accurate

Heirloom's core technology is compiler-based and capable of refactoring very large complex mainframe applications built from millions of lines of code into Java in minutes. The resulting application is guaranteed to exactly match the function & behavior of the original application.

Complete Solution

Mainframe applications are dependent upon key subsystems such as transaction processors, job control, file handlers, and resource-level security & authentication. Heirloom faithfully replicates all of these major subsystems by providing a Java equivalent (for example, JES/JCL) or a layer that provides a seamless mapping to an open systems equivalent (for example, Open LDAP for security).

Built for Cloud

Heirloom was designed and built for the cloud from the the start. Cloud-native deployment delivers application elasticity (the ability to dynamically scale-out and scale-back), high availability (always accessible from anywhere at anytime), and pay-for-use (dynamic right-sizing of capacity for efficient resource utilization).


Heirloom Computing works with industry-leading systems integrators to offer complete application modernization & PaaS enablement solutions to enterprises and ISVs.

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