What RTSI does

RTSI is a Plano, Texas-based consulting firm founded in October 1993 that specializes in OS-9 and real-time systems solutions. The company originated from a strategic pivot at Mizar Inc. (from 68K to DSP) and has focused exclusively on OS-9-based projects since inception, building over three decades of domain expertise in Microware-based software. It self-describes as the leading consulting firm in the OS-9 niche and serves enterprise clients with customized, project-based engagements requiring creative, individualized engineering solutions for complex real-time systems.

The firm's core asset is ownership of the Microware OS-9 real-time operating system, acquired in February 2013 jointly with Microsys Gmbh and Freestation Inc. from Radisys Corporation. Since the acquisition, RTSI has continuously updated and added features to the OS-9 platform, positioning the firm as both a maintainer of a niche legacy RTOS and a specialized consulting practice. Its revenue model is professional services — quote-based, project-specific consulting engagements — with no disclosed pricing or recurring product subscriptions beyond ongoing OS-9 stewardship. The customer base is described as enterprise clients requiring real-time systems, though no specific logos or verticals are disclosed.

RTSI is a privately held LLC with 11–50 employees, no disclosed outside investors, no parent company, and no documented geographic expansion beyond an implicit European reach via its German partner Microsys Gmbh. The company shows no AI, software-as-a-service, or recurring-product commercialization layers; its operating model is fundamentally that of a founder-led niche engineering consultancy centered on a single legacy operating system.

Name

RTSI

Legal name

RTSI LLC

Website

https://rtsi.com

Company type

Private

Founded year

1993

Operating status

Operating

Headcount range

11–50 employees

Short description

RTSI is a Plano, Texas-based consulting firm specializing in OS-9 real-time operating system solutions for enterprise clients. Founded in 1993, it co-owns the Microware OS-9 platform (acquired in 2013) and delivers customized engineering services for complex real-time systems.

Ownership category

akta.pro rank

Headquarters

HQ city

Plano

HQ country

United States

HQ region

North America

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Technology or R&D, Operations, Marketing or Sales

Revenue model

1. Consulting Services: RTSI provides customized consulting services for OS-9 and real-time related systems solutions. The company utilizes varied areas of expertise to satisfy individual client requirements, bringing together creative ideas and efficient solutions to address unique system needs.

Go-to-market motion1 record

Core offering

RTSI is a consulting firm specializing in OS-9 and real-time systems, providing customized solutions for embedded and real-time operating system implementations. The firm owns rights to the OS-9 RTOS alongside its partners and supports enterprise clients with integration, customization, and ongoing feature development for OS-9-based platforms.

Product overview

RTSI is a consulting firm specializing in OS-9 based projects and real-time systems solutions. The company was formed in October 1993 and is the leading consulting firm in OS-9 and real-time related systems solutions. In February 2013, RTSI LLC (along with Microsys Gmbh and Freestation Inc.) acquired all rights to Microware OS-9 from Radisys Corporation, and has since been updating and adding new features to the OS-9 operating system. Their primary offering is the OS-9 real-time operating system platform, complemented by consulting services.

Differentiator

Problem solved

Functional benefit

Products and services

• OS-9 Real-Time Operating System A real-time operating system used as the foundation for embedded and real-time systems products. RTSI holds rights to the OS-9 platform and continues to update and extend it with new features for enterprise clients building RTOS-based solutions.
• Real-Time Systems Consulting Services Customized consulting, integration, and feature-development services for OS-9 and other real-time embedded systems, delivered by a tightly selected engineering team to enterprise clients with embedded product needs.

Segments1 record

Ideal customer profiles1 record

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

Two partnerships are on record, tiered core.

• Microsys GmbhcoreStrategic or Co-development Partner · 1 February 2013In February 2013, RTSI LLC, Microsys Gmbh, and Freestation Inc. jointly purchased all rights to Microware OS-9 from Radisys Corporation. This strategic partnership gives RTSI ownership and control over the OS-9 operating system, enabling ongoing updates and new feature development.
• Freestation Inc.coreStrategic or Co-development Partner · 1 February 2013In February 2013, RTSI LLC, Microsys Gmbh, and Freestation Inc. jointly purchased all rights to Microware OS-9 from Radisys Corporation. This strategic partnership enables co-development and maintenance of the OS-9 real-time operating system.

Scale indicators2 records

Recent moves4 records

Expansion highlights2 records

Emerging players

• SYSGO: European vendor of the PikeOS safe and secure RTOS and hypervisor for embedded safety-critical systems in automotive, aerospace, and industrial applications. Comparable niche RTOS specialist focused on certification-driven real-time workloads.
• Concurrent Real-Time (CCPUA / Real-Time Innovations): Vendor of real-time middleware and connectivity frameworks for distributed embedded systems. Comparable to RTSI in serving real-time, embedded customer workloads, though addressing newer architectures (DDS) rather than a legacy RTOS.

Broad incumbents

• Lynx Software Technologies: Provider of the LynxOS real-time operating system for safety- and security-critical embedded systems in aerospace, defense, and industrial markets. A directly comparable RTOS-vendor incumbent to RTSI's OS-9 proposition.
• BlackBerry QNX: Provider of the QNX Neutrino RTOS and embedded middleware for automotive, medical, industrial, and defense applications. Operates in the same real-time operating system space as RTSI but at vastly greater scale and across multiple verticals.
• Green Hills Software: Vendor of the INTEGRITY and µ-velOSity real-time operating systems and integrated development tools for safety- and security-critical embedded devices. Broad incumbent in the same RTOS category RTSI services, particularly in aerospace, defense, and industrial verticals.
• Wind River Systems: Established commercial RTOS vendor (VxWorks) and embedded software platform provider serving aerospace, defense, industrial, and automotive customers. Broad incumbent in the real-time/embedded OS market where RTSI competes with a niche legacy stack.
• ENEA: Supplier of the OSE real-time operating system and related telecom/embedded infrastructure software. Comparable to RTSI as an RTOS-focused vendor serving demanding real-time workloads in industrial and communications deployments.

Direct peers

• Microsys GmbH: German-based co-owner of the Microware OS-9 rights (acquired jointly with RTSI in February 2013). Operates in the same OS-9 consulting and RTOS maintenance niche, making it the most direct peer to RTSI in terms of technology focus and customer offering.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights5 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about RTSI