What Dignus does

Dignus, LLC is a privately held developer-tools vendor headquartered in Raleigh, North Carolina, specializing in compilers, assemblers, and programming environments for the IBM mainframe ecosystem. The company's product line consists of three core offerings: Systems/C, a C compiler with ANSI C and C23 support and native z/OS execution; Systems/C++, a C++ compiler supporting ANSI 98, C++11, C++14 (with STL) and IBM LE-runtime compatibility; and Systems/ASM, an HLASM R6-compatible assembler supporting z/Architecture through the ZSERIES9/z15 instruction set. All three products support both native compilation on mainframe operating systems (z/OS, z/VM, z/VSE, z/TPF, Linux for S/390) and cross-compilation from Windows, macOS, Linux, AIX, Solaris, HP-UX, and FreeBSD workstations, enabling developers to assemble and compile locally before deploying. Differentiated features include inline assembly integration with C/C++, full CICS preprocessor support, and compatibility with Cole Software's z/XDC debugger and SlickEdit editor.

The company operates an enterprise field-sales model with a product-led-growth layer: web-based test-drive tools and 30-day free trials lower evaluation friction, while final sales are closed via direct contact ([email protected]) and phone. Revenue is generated through one-time software licensing, with version releases suggesting a perpetual-license model plus upgrade or maintenance economics. The company is a member of IBM's PartnerWorld for Developers program and holds registered trademarks on each of its three product brands. Its addressable market is global enterprise mainframe shops running IBM operating systems, with active served markets cited in the US, Singapore, UK, and Australia.

Operationally, Dignus is a small, privately held LLC with 11-50 employees, no disclosed funding rounds, no acquisitions, and no public revenue figures. Product release cadence (2016, 2022, 2024) and steady operation since at least 1998 indicate a mature niche business optimized for cash-generative durability rather than rapid scaling. The company serves mainframe C/C++ and assembler developers whose codebases are tightly coupled to IBM's HLASM-compatible toolchains, creating switching costs that protect the existing customer base but limiting expansion velocity.

Name

Dignus

Legal name

Dignus, LLC

Website

https://dignus.com

Company type

Private

Founded year

1998

Operating status

Operating

Headcount range

11–50 employees

Short description

Dignus, LLC develops and licenses compilers (Systems/C, Systems/C++) and an HLASM-compatible assembler (Systems/ASM) for IBM mainframe operating systems, serving enterprise mainframe developers globally through direct sales and perpetual licensing.

Ownership category

akta.pro rank

Product category

Mainframe Development Tools

NAICS

Computer Systems Design and Related Services (54151)

akta.pro primary industry

Enterprise Mainframes (HDACABAE)

Keywords

• Mainframe development tools
• C compiler software
• C++ compiler software
• HLASM compatible assembler
• IBM mainframe software

Headquarters

HQ city

Raleigh

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. Software Licensing: Dignus generates revenue through licensing of its Systems/C, Systems/C++ compilers and Systems/ASM assembler products. Version releases (V2.30, V2.00) with new features suggest a perpetual license model with potential upgrade fees or maintenance contracts.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Dignus designs, develops, and licenses mainframe compilers and assemblers. Its product line comprises Systems/C (a C compiler), Systems/C++ (a C++ compiler), and Systems/ASM (an HLASM-compatible assembler), all targeted at IBM z-series mainframe platforms (z/OS, z/VM, z/VSE, z/Linux, z/TPF) and operated via a cross-platform host interface that accepts source code on Windows, UNIX, and Linux systems and produces output for mainframe environments.

Differentiator

Problem solved

Functional benefit

Brands

• Systems/C: Premier C compiler product for the IBM mainframe, supporting ANSI C standards and generating assembly language source for zSeries systems.
• Systems/C++
• Systems/ASM

Products and services

• Systems/C Proprietary C compiler for IBM mainframe platforms (z/OS, z/VM, z/VSE, z/Linux, z/TPF). Accepts ANSI/ISO C source code with IBM C language extensions on Windows, UNIX, or Linux hosts and produces mainframe executable output. Intended for enterprise development teams maintaining or porting C applications on IBM z-series systems.
• Systems/C++ Proprietary C++ compiler for IBM mainframe platforms (z/OS, z/VM, z/VSE, z/Linux, z/TPF). Compiles C++ source to mainframe object code and supports Cfront-style and ARM-style C++ dialects. Includes integration with the Dignus Systems/ASM assembler via inline asm() and #pragma asm directives, enabling mixed C/C++/assembler development. Targeted at enterprise mainframe development organizations.
• Systems/ASM HLASM-compatible IBM mainframe assembler. Reads and translates IBM High Level Assembler (HLASM) source code to mainframe object code with conditional translation support (ESDID records, conditional assembly). Bundled with the Systems/C/C++ compiler distributions and sold standalone. Targeted at enterprise development teams maintaining HLASM-coded mainframe modules.

Segments2 records

Ideal customer profiles1 record

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration2 records

Feature5 records

Partnerships

Two partnerships are on record, tiered minor and core.

• MVS TrainingminorOthersMVS Training, Inc is listed as a partner/relationship on Dignus' links page. They provide on-site training and technical books to improve mainframe technical skills.
• IBM PartnerWorld for DeveloperscoreOthersDignus is a member of IBM's PartnerWorld for Developers program, indicating a formal relationship with IBM as a development tools provider for the IBM mainframe ecosystem.

Scale indicators1 record

Recent moves5 records

Expansion highlights5 records

Emerging players

• SimoTime Technologies: SimoTime sells mainframe development utilities, conversion tools, and training for IBM mainframe environments. A smaller, niche vendor that overlaps with Dignus on legacy assembler/mainframe tooling needs.
• Heirloom Computing: Heirloom Computing (now part of NTT Data) specializes in mainframe application modernization and COBOL-to-modern conversions, addressing the same IBM mainframe developer audience with adjacent tooling that competes for modernizer/C/C++ workflow spend.
• Modern Systems (now Hexaware / Amaze): Modern Systems, later folded into Hexaware and the Amaze portfolio, sells mainframe modernization and legacy re-engineering tools that partially overlap with Dignus' compiler/assembler development workflows for IBM z/OS customers.

Others

• Skytap (IBM Cloud partner): Skytap provides on-demand IBM mainframe environments in the cloud, complementary to Dignus' compilers - they enable hosting while Dignus provides the build/compile toolchain for the same z/OS workloads.
• MVS Training, Inc. MVS Training is listed as a partnership/relationship on Dignus' site and provides on-site mainframe training and technical books. Addresses the same IBM mainframe developer base through training rather than tooling.

Broad incumbents

• Rocket Software: Rocket Software is a large incumbent vendor of mainframe development, modernization, and operations tools for IBM z/OS. Overlaps with Dignus in the mainframe developer tooling category (compilers, assembler, debugger interfaces) but operates much broader across the mainframe stack.
• IBM: IBM itself ships the XL C/C++ compiler for z/OS and High Level Assembler (HLASM) - the incumbent tools Dignus' Systems/C, Systems/C++, and Systems/ASM position against as lower-cost plug-compatible alternatives for IBM mainframe developers.
• OpenText (formerly Micro Focus): OpenText acquired Micro Focus, which historically offered mainframe/COBOL development tools and modernization suites. Targets the same IBM mainframe developer base as Dignus and competes for the same modernization and C/C++/assembler tool budgets.

Direct peers

• SlickEdit: SlickEdit is an enterprise code editor and IDE already listed as a partner that interfaces directly with Dignus' Systems/C, Systems/C++, and Systems/ASM products. They serve the same IBM mainframe developer base and offer closely-adjacent workstation-side compilation and editing tooling.
• Cole Software: Cole Software makes the z/XDC source-level debugger for z/OS assembler programs and is an integration partner of Dignus. Competes for the same mainframe developer budget by providing downstream debugging tooling in the same compile-assemble-debug workflow.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/Dignus-125162448724
• LinkedInlinkedin.com/company/dignus-llc

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 Dignus