KUSANAGI 9 is a high-performance, secure execution environment for running WordPress fast and stable. Business Edition adds the AI Assist plugin for WordPress 7.0, environment diagnostics, multi-PHP containers, and long-term operation support for production sites.
KUSANAGI 9 is a high-performance execution environment that has run WordPress fast, secure, and stable for over a decade, with up to 260x faster page delivery than a standard LAMP stack, across major clouds. That proven platform is the foundation. KUSANAGI 9 Business Edition is what you add on top to run WordPress in production for the long term.
WordPress 7.0 introduced the foundation for AI integration (AI Client and the Abilities API). Business Edition is the environment for putting that AI to work in day-to-day operations, and for keeping it (and your site) running reliably for years.
What Business Edition adds:
AI Assist plugin (NEW): Its first feature, Plugin Advisor, periodically checks your installed plugins for compatibility, long-unmaintained code, and file tampering, then lets you ask AI how to prioritize and respond. The capabilities KUSANAGI registers via the WordPress Abilities API are read-only. AI never changes settings on its own.
Environment diagnostics (analyze): A single command scans the whole server for leftover risky files, misconfigurations, and permission issues, reported as alert / notice / info.
Multi-PHP containers: Run a different PHP version per site on a single server, so you can keep legacy sites running while testing newer environments without adding servers.
WordPress operation guarantee: Operation-tested packages for major WordPress releases, with module and middleware updates through AlmaLinux OS EOL.
Backed by the developer, GMO Prime Strategy: vetted update repositories, published security advisories, and EULA-based support, so you can run WordPress and its AI features safely over the long term.
Key features:
Improves WordPress (and other CMS) speed and stability
TLS 1.3 (TLS 1.1 and older disabled), Let's Encrypt, and monit
WordPress visual provisioning on first launch, and provisioning via commands
Compatible with the newest major instance types
Requirements: The AI Assist plugin requires WordPress 7.0 or later and WordPress-side AI setup (AI / AI-provider plugins and a Connectors API key), and is available on Business and Premium editions. Multi-PHP containers require an nginx + MariaDB environment (Apache is not supported).
Highlights
AI-ready for production WordPress (Business Edition). WordPress 7.0's new AI, put to work. The AI Assist plugin's Plugin Advisor flags risky plugins and helps you decide what to update, remove, or reinstall.
Built to run for years (Business Edition). Operation-tested WordPress packages, module updates through AlmaLinux OS EOL, security advisories, and support from the developer.
Built on the proven KUSANAGI platform. Up to 260x faster than a standard LAMP stack, with WAF, TLS 1.3, and Let's Encrypt. 100,000+ deployments over 10+ years on the KUSANAGI platform.
AWS Marketplace now accepts line of credit payments through the PNC Vendor Finance program. This program is available to select AWS customers in the US, excluding NV, NC, ND, TN, & VT.
Pricing is based on actual usage, with charges varying according to how much you consume. Subscriptions have no end date and may be canceled any time.
Additional AWS infrastructure costs may apply. Use the AWS Pricing Calculator to estimate your infrastructure costs.
If you are an AWS Free Tier customer with a free plan, you are eligible to subscribe to this offer. You can use free credits to cover the cost of eligible AWS infrastructure. See AWS Free Tier for more details. If you created an AWS account before July 15th, 2025, and qualify for the Legacy AWS Free Tier, Amazon EC2 charges for Micro instances are free for up to 750 hours per month. See Legacy AWS Free Tier for more details.
You pay by the hour for this software running on Amazon EC2. Pricing is not tiered by plan. Instead, you pick one EC2 instance type, and the hourly software rate matches that choice. The listing covers hundreds of instance types across general purpose, compute-optimized, memory-optimized, and storage families, in sizes from small to very large. Larger instances carry higher hourly rates because they provide more vCPU and memory. You run the software on AlmaLinux OS and stop charges when you stop the instance. AWS infrastructure costs are billed separately by AWS.
Top-of-mind questions for buyers
What do I actually get with each hourly instance rate?
Each rate covers the KUSANAGI Business Edition software running on one EC2 instance of the type you pick, on AlmaLinux OS. The instance type sets the vCPU and memory you receive. Larger instances provide more resources and carry higher hourly software rates. AWS infrastructure charges are separate.
Am I charged the software rate when I stop the EC2 instance?
The hourly software charge meters running time only. When you stop the instance, the software rate stops accruing. AWS may still bill underlying storage or other resources while the instance is stopped. Restarting the instance resumes the hourly software charge at your chosen instance type's rate.
How does my bill change if I move to a larger instance type?
You are not locked into a tier. If you launch a larger instance type, that instance bills at its own higher hourly software rate for the hours it runs. Smaller instances bill at lower rates. There is no upgrade step; the rate simply matches whichever instance type you run.
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Hourly Subscriptions: We do not currently support refunds, but you can cancel at any time.
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An AMI is a virtual image that provides the information required to launch an instance. Amazon EC2 (Elastic Compute Cloud) instances are virtual servers on which you can run your applications and workloads, offering varying combinations of CPU, memory, storage, and networking resources. You can launch as many instances from as many different AMIs as you need.
Version release notes
Updated KUSANAGI to the latest available version.
Additional details
Usage instructions
Launch the AMI, using 1-click
Once the instance is, copy the Public DNS (IPv4) from the EC2 console and paste it into the browser.
When the page opens, copy the Instance ID from the EC2 console and paste it into the authentication window to launch WordPress.
Basic technical support is included with this product. Support is provided mainly in Japanese; for other languages, please contact us.
An evaluation version is also available by private offer. To request a trial, please contact us using the form below.
For more hands-on help, the developer (Prime Strategy) also offers two professional services on AWS Marketplace. Both are available for Business Edition through a private offer:
KUSANAGI Professional Deployment Services: expert-led setup, secure migration, and configuration tuning for a smooth, low-risk deployment.
KUSANAGI Professional Support Service: ongoing, ticket-based technical support with performance and security optimization and day-to-day operations guidance.
AWS Support is a one-on-one, fast-response support channel that is staffed 24x7x365 with experienced and technical support engineers. The service helps customers of all sizes and technical abilities to successfully utilize the products and features provided by Amazon Web Services.
WAF implementation with nginx NAXSI and Apache ModSecurity, including WordPress-specific WAF signature updates
Multi-PHP Container Support
Ability to run different PHP versions per site on a single server using nginx and MariaDB environment
AI Plugin Compatibility
AI Assist plugin with Plugin Advisor feature that checks installed plugins for compatibility issues, unmaintained code, and file tampering using WordPress Abilities API
Server Diagnostics and Analysis
Environment diagnostics command that scans server for risky files, misconfigurations, and permission issues with alert, notice, and info level reporting
TLS and Encryption Standards
TLS 1.3 support with TLS 1.1 and older versions disabled, Let's Encrypt integration, and monit monitoring
Operating System Foundation
CentOS 9 operating system with optimized performance enhancements and security best practices
Pre-configured Web Stack
Apache, MySQL, and PHP stack pre-installed and configured for WordPress deployment
Automated Security Features
Pre-installed security features protecting against common vulnerabilities with automatic updates for WordPress releases and security patches
Scalability Architecture
Horizontal scaling capability to handle increased traffic and workloads without performance degradation
Rapid Deployment
Pre-configured Amazon Machine Image enabling WordPress site launch within minutes without extensive manual configuration
Web Server and Caching
NGINX with FastCGI cache for lightweight performance and reduced server load
Runtime Environment
PHP 8 runtime environment for WordPress application execution
Database Management
MariaDB for MySQL database management and data persistence
Command Line Interface
WP-CLI pre-installed for WordPress command-line administration and automation
Security Updates
Automatic daily security updates configured and deployed by default
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