21st Century Software

What 21st Century Software does

21st Century Software Technologies, Inc. (21CS) is a private, US-incorporated mainframe software company headquartered in Wayne, United States, that serves organizations running mission-critical workloads on IBM Z mainframes. The company's portfolio is built around data protection, reliability, resiliency, and repeatability for the z/OS platform, with a stated focus on improving how enterprises manage and modernize mainframe environments. Its primary disclosed product is Eccox APT (Application Environment Management for Parallel Testing), a next-generation test environment manager purpose-built for parallel testing and application environment management on enterprise z/OS.

Under a reciprocal strategic partnership announced with Eccox Technology (Brazil), 21CS acts as the global distribution partner for Eccox APT while Eccox becomes 21CS's regional channel in Brazil, giving 21CS Latin American reach and adding a parallel-testing capability to its portfolio. The company operates an enterprise field sales motion targeting large IBM Z operators, supplemented by partner-led revenue initiatives and a dual distribution model spanning direct enterprise sales and regional resellers.

21CS employs between 11 and 50 people. In 2026 the company has actively built out its senior team with the appointment of two Directors of Global Strategy (Dusty Rivers and Len Santalucia) and a Chief Commercial Officer (Clemencia 'Cleo' Clarke) recruited from IBM, while also expanding its partner footprint internationally. Pricing is not publicly disclosed, no revenue figures have been reported, no funding rounds or investors have been identified, and the ownership structure is not disclosed in available sources; the company's website is currently a parked BlueHost page, which is a discrepancy with the active operating profile implied by the firmographic, leadership, and partnership data.

Name

21st Century Software

Legal name

21st Century Software Technologies, Inc.

Website

https://21stcenturysoftware.com

Company type

Private

Operating status

Operating

Headcount range

11–50 employees

Short description

21st Century Software Technologies (21CS) is a private Wayne, US-based mainframe software company serving enterprise IBM Z operators. It delivers data protection, resiliency, and test environment management tools for the z/OS platform, including global distribution of Eccox APT.

Ownership category

akta.pro rank

Product category

Mainframe Software

NAICS

Software Publishers (513210), Custom Computer Programming Services (541511)

SIC

Services-Prepackaged Software (7372), Services-Computer Programming, Data Processing, Etc. (7370)

akta.pro primary industry

Enterprise Application Lifecycle Management (ALM) Platforms (HDAEAKAJ)

akta.pro secondary industry

Developer Experience Platforms for Enterprise (IDEs, CI/CD, Dev Portals) (HDAEAKAI)

Keywords

• Mainframe software
• IBM Z solutions
• Z/OS testing
• Mainframe modernization
• Parallel testing software

Headquarters

HQ city

Wayne

HQ country

United States

HQ region

North America

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Go-to-market motion1 record

Distribution channels2 records

Core offering

21st Century Software (21CS) develops and delivers mainframe software solutions targeted at the IBM Z ecosystem, with a focus on z/OS platforms. Its primary offering is Eccox APT, a next-generation test environment manager that enables parallel testing and application environment management for enterprise mainframe customers modernizing mission-critical workloads. The company also serves as the global distribution partner for Eccox APT.

Product overview

21st Century Software Technologies (21CS) offers a portfolio of mainframe software solutions focused on the IBM Z ecosystem. The company's primary product mentioned in available sources is Eccox APT (Application Environment Management for Parallel Testing), a next-generation test environment manager for enterprise z/OS customers. 21CS operates as both a provider of its own mainframe solutions and as a global distribution partner for Eccox APT, positioning itself within the mainframe modernization space for mission-critical z/OS workloads.

Differentiator

Problem solved

Functional benefit

Products and services

• Eccox APT (Application Environment Management for Parallel Testing) A next-generation test environment manager for enterprise z/OS customers that enables application environment management for parallel testing scenarios, supporting mainframe modernization workloads.

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

One partnership is on record.

• Eccox TechnologycoreStrategic or Co-development Partner · 12 March 2026Strategic partnership with Eccox Technology, a Brazilian company specializing in mainframe software development and testing solutions for the z/OS platform. Under the agreement, Eccox becomes a 21CS partner in Brazil expanding regional access to its mainframe solutions, while 21CS becomes the global partner for Eccox APT (Application Environment Management for Parallel Testing). The partnership aims to accelerate mainframe modernization, expand global reach, and deliver greater value to organizations running mission-critical workloads.

Recent moves3 records

Expansion highlights5 records

Direct peers

• Astadia: Astadia specializes in mainframe-to-modern modernization and testing services for IBM Z environments, competing for similar enterprise modernization budgets as 21CS.
• BMC Software (Compuware): BMC's Compuware mainframe DevOps, testing, and application lifecycle tooling directly competes with 21CS's Eccox APT offering for enterprise z/OS customers running mission-critical workloads.
• Rocket Software: Rocket Software is a leading mainframe modernization and developer tooling vendor for IBM Z, overlapping directly with 21CS's parallel testing and application environment management focus.
• Eccox Technology: Brazil-based Eccox builds mainframe software development and testing solutions for z/OS and is now both a 21CS partner and the originator of Eccox APT, making it the most directly comparable peer.
• RSM Partners: RSM Partners provides mainframe security, performance and application lifecycle services for IBM Z environments, making it a relevant comparable in 21CS's specialty.

Broad incumbents

• IBM (IBM Z / Z DevOps): IBM owns the z/OS platform and offers competing IBM Z DevOps and testing tools; despite partnership signaling, IBM is the broad incumbent in 21CS's addressable market.
• Broadcom (CA mainframe portfolio): Broadcom's CA Technologies mainframe application lifecycle and DevOps tools compete with 21CS at large enterprises as part of a broader enterprise software portfolio.
• OpenText (Micro Focus mainframe): OpenText absorbed Micro Focus's mainframe modernization and testing portfolio, positioning it as a broad incumbent addressing the same enterprise z/OS test and modernization needs as 21CS.
• Precisely: Precisely provides data integrity and mainframe-related tooling adjacent to 21CS's IBM Z application lifecycle footprint, targeting overlapping enterprise mainframe customers.

Emerging players

• Heirloom Computing: Heirloom focuses on automated mainframe-to-cloud refactoring and testing tooling for z/OS workloads, an emerging alternative in the same application lifecycle and modernization space.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks4 records

Key highlights5 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

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 21st Century Software