SIOS Technology, Inc. (Headquarters: Minato-ku, Tokyo; President: Nobuo Kita; hereinafter referred to as SIOS Technology) is pleased to announce that "LifeKeeper" will be listed as the first registered software on "Marketplace EXPRESS," a new service to be offered by Sakura Internet Inc. (hereinafter referred to as Sakura Internet) starting July 1, 2026. "Marketplace EXPRESS" is a new system that publishes information on the operational verification of external software and services on the public cloud "Sakura Cloud." [Background and Objectives] SIOS Technology has supported users in operating mission-critical applications with peace of mind by minimizing the impact of system failures on business through the provision of HA cluster software "LifeKeeper." "LifeKeeper" is software that has been verified for operation on "Sakura Cloud." With its inclusion in "Marketplace EXPRESS," configuration examples and procedures for using "LifeKeeper" on "Sakura Cloud" will be available. This will reduce the effort required for users to confirm product compatibility, allowing them to focus on application design and construction on the cloud. Figure 1: Verified HA Cluster Configuration on "Sakura Cloud" For more details, please see: https://bccs.sios.jp/usecases/sakura_cloud.html SIOS Technology will continue to leverage its accumulated expertise to provide highly available systems for users migrating to the cloud, particularly in the public sector. ■About "Marketplace EXPRESS" "Marketplace EXPRESS" is a system that publishes information on the operational verification of external software and services on "Sakura Cloud" provided by Sakura Internet, supporting users in their product selection. For more details, please see: http://cloud.sakura.ad.jp/marketplace/ ■About "LifeKeeper" "LifeKeeper" is an HA cluster product with over 90,000 licenses implemented worldwide. By introducing "LifeKeeper," users can achieve high availability at the application level. Furthermore, by combining