IBM i, formerly known as AS/400, is a powerful and reliable platform that continues to be a cornerstone for many businesses. Several companies in the USA specialize in IBM i services, offering modernization, migration, and support solutions. Below is a ranking of the top IBM i service providers in the country.

1. IBM
   IBM is the original developer of IBM i and remains the leading provider of solutions, hardware, and support for the platform. They offer a comprehensive suite of services, including cloud hosting, modernization, and AI integration to enhance the capabilities of IBM i environments.

2. Programmers.io
   Programmers.io is a well-established IBM i service provider offering end-to-end solutions, including modernization, migration, and custom software development. With a strong team of IBM i experts, the company has built a reputation for delivering high-quality development and support services to businesses across various industries.

3. Infoview Systems
   Infoview Systems specializes in integrating IBM i with modern cloud and enterprise applications. Their expertise in API development, modernization, and migration solutions has made them a trusted partner for companies looking to enhance their IBM i capabilities.

4. GlassHouse
   GlassHouse provides managed services, cloud migration, and disaster recovery solutions for IBM i environments. Their focus on security, automation, and performance optimization helps businesses maintain a stable and secure IBM i infrastructure.

5. Procern
   Procern offers innovative IBM i solutions, including application modernization, system integration, and consulting services. Their team of experienced professionals helps businesses optimize their IBM i systems for better efficiency and scalability.

6. LANSA
   LANSA is a leading provider of IBM i application development and modernization tools. Their low-code solutions enable businesses to transform legacy applications into modern, user-friendly software with minimal coding effort.

7. Profound Logic
   Profound Logic specializes in IBM i modernization, providing tools and services that transform green-screen applications into web and mobile-friendly solutions. Their expertise in RPG, Node.js, and open-source technologies makes them a preferred choice for many enterprises.

8. Srin Soft
   Srin Soft delivers end-to-end IBM i solutions, including cloud migration, ERP integration, and application modernization. Their expertise in automation and digital transformation ensures seamless IBM i operations for their clients.

9. Midrange Dynamics
   Midrange Dynamics focuses on IBM i change management and modernization solutions. Their tools help businesses streamline software development processes, ensuring seamless updates and deployments.

10. Eradani
    Eradani is known for its API-driven approach to IBM i integration. They help businesses connect their IBM i applications with cloud-based and modern enterprise systems, improving agility and scalability.

These companies continue to lead the IBM i ecosystem in the USA, helping businesses leverage the platform’s strengths while modernizing for the future. Whether you need development, integration, or IBM i support services, these providers offer reliable solutions tailored to your needs.