AWS Mainframe Modernization Service (Managed Runtime Environment experience) will no longer be open to new customers starting on November 7, 2025. If you would like to use the service, please sign up prior to November 7, 2025. For capabilities similar to AWS Mainframe Modernization Service (Managed Runtime Environment experience) explore AWS Mainframe Modernization Service (Self-Managed Experience). Existing customers can continue to use the service as normal. For more information, see AWS Mainframe Modernization availability change.
AWS Mainframe Modernization availability change
AWS Mainframe Modernization Service (Managed Runtime Environment experience) will stop accepting new customers on November 7, 2025, while existing customers can continue using the service with no disruption to their ongoing modernization projects. This service provides both managed and self-managed versions of third-party software solution Rocket for replatforming. This service availability change impacts the Managed version only. New projects will be directed to the self-managed version.
While we will not be adding new features to the service, we remain committed to providing security updates and maintaining service availability to ensure ongoing modernization projects continue to run smoothly. Our focus is on ensuring a stable environment for existing customers to complete their mainframe modernization initiatives while preparing for the transition to the self-managed version.
AWS Mainframe Modernization Service (Self-Managed Experience) is our recommended solution that provides the same core functionality for mainframe modernization.
The two customers will be supported during their transition to the self-managed experience model, which is expected to be completed within 6–9 months. AWS ProServe will help the two managed customers transition to the self-managed experience model over 6 months.
If you have additional questions, please contact us through the AWS Support or read our FAQs
What does this mean for the service (are you going to shut the service down?)? AWS Mainframe Modernization Service (Managed Runtime Environment experience) will stop accepting new customers starting November 7, 2025. The service will continue to operate for existing customers to complete their ongoing migration projects.
How will existing customers be impacted? Existing customers will continue to receive full support, with AWS Proserve assisting in the transition to the self-managed version.
On November 7, 2025, the customer is having issues, how can they escalate? Existing managed service customers will receive dedicated support from AWS ProServe to help transition to the self-managed version, ensuring continuity of their modernization projects.
What are the alternatives customers can explore? The self-managed version of AWS Mainframe Modernization Service provides runtime functionality for both Rocket Software (replatform) and Blu Age (refactor) capabilities.
How can customers migrate off of AWS Mainframe Modernization Service (Managed Runtime Environment experience)? No formal migration process is required. Existing environments will be supported by AWS ProServe to assist with the transition to the appropriate self-managed pattern
