List of IBM Z mainframes Customers
IBM
1 New Orchard Road,
Armonk, 10504, NY,
United States
Armonk, 10504, NY,
United States
1 914-499-1900
Professional Services
293000
$67.5B
Since 2010, our global team of researchers has been studying IBM Z mainframes customers around the world, aggregating massive amounts of data points that form the basis of our forecast assumptions and perhaps the rise and fall of certain vendors and their products on a quarterly basis.
Each quarter our research team identifies companies that have purchased IBM Z mainframes for Servers, Storage and Networking from public (Press Releases, Customer References, Testimonials, Case Studies and Success Stories) and proprietary sources, including the customer size, industry, location, implementation status, partner involvement, LOB Key Stakeholders and related IT decision-makers contact details.
Companies using IBM Z mainframes for Servers, Storage and Networking include: Citigroup, a United States based Banking and Financial Services organisation with 230000 employees and revenues of $81.09 billion, Synchrony, a United States based Banking and Financial Services organisation with 20000 employees and revenues of $16.13 billion, Caixa Econômica Federal (CAIXA), a Brazil based Banking and Financial Services organisation with 83640 employees and revenues of $11.55 billion, Amtrak, a United States based Transportation organisation with 22400 employees and revenues of $3.60 billion, Travelport, a United Kingdom based Professional Services organisation with 3750 employees and revenues of $2.76 billion and many others.
Contact us if you need a completed and verified list of companies using IBM Z mainframes, including the breakdown by industry (21 Verticals), Geography (Region, Country, State, City), Company Size (Revenue, Employees, Asset) and related IT Decision Makers, Key Stakeholders, business and technology executives responsible for the software purchases.
The IBM Z mainframes customer wins are being incorporated in our Enterprise Applications Buyer Insight and Technographics Customer Database which has over 100 data fields that detail company usage of software systems and their digital transformation initiatives. Apps Run The World wants to become your No. 1 technographic data source!
Apply Filters For Customers
| Logo | Customer | Industry | Empl. | Revenue | Country | Vendor | Application | Category | When | SI | Insight |
|---|---|---|---|---|---|---|---|---|---|---|---|
 |
Amtrak | Transportation | 22400 | $3.6B | United States | IBM | IBM Z mainframes | Servers, Storage and Networking | 2020 | n/a |
In 2020, Amtrak deployed IBM Z mainframes as a core element of its Servers, Storage and Networking strategy to support mission critical infrastructure for engineering and operations. The deployment targeted onsite operations and platform engineering activities across Washington, D.C., Philadelphia, Wilmington, and Chicago, aligning compute and storage capacity with enterprise DevOps needs.
The implementation emphasized pipelines-as-code, CI/CD, and Infrastructure-as-Code governance led by a Lead DevOps Engineer role responsible for systems development approach and release automation. Teams built and maintained CI/CD pipelines using Jenkins Pipeline, GitHub Actions, or GitLab CI, and implemented IaC with Terraform, AWS CloudFormation, and Ansible to provision and configure compute, storage and network resources consumed by IBM Z mainframes.
Integrations documented in role requirements include connection points between mainframe infrastructure and pipeline tooling, secret scanning, SAST and DAST security tooling, open source scanning and SBOM generation, plus monitoring to report build health and DORA-style metrics. Operational coverage included software development, platform engineering, infrastructure operations, and security teams, with Documentation-as-Code used to capture architecture, deployment patterns, and runbooks for the IBM Z mainframes.
Governance and process restructuring focused on embedding security tollgates into pipelines, establishing compliance checkpoints, and standardizing reusable IaC modules and developer onboarding portals to accelerate developer access. Delivery discipline required clear requirements, documented development and testing methodologies, and robust unit, system and integration testing regimens with cross-functional oversight from the Lead Systems Engineer.
Amtrak IBM Z mainframes Servers, Storage and Networking support platform engineering, CI/CD, and infrastructure automation functions, with explicit emphasis on security, compliance and repeatable provisioning workflows for enterprise application delivery.
|
 |
Banco de Brasilia | Banking and Financial Services | 3280 | $693M | Brazil | IBM | IBM Z mainframes | Servers, Storage and Networking | 2018 | n/a |
In 2018 Banco de Brasília implemented IBM Z mainframes within its Servers, Storage and Networking estate to consolidate high-platform processing and modernize monitoring for its transaction footprint serving more than 7 million customers. The IBM Z mainframes deployment centered on IBM z15 hardware and aimed to deliver a hyper secure, agile and hybrid multi-cloud-ready infrastructure while bringing mainframe telemetry into enterprise observability workflows.
The implementation configured IBM Tivoli Enterprise Portal and the IBM OMEGAMON Data Provider from the IBM Z Service Management Suite to collect real-time data from IBM z/OS agents and key subsystems. Instrumentation included IBM CICS Transaction Server, IBM Db2, IBM MQ, storage, network and Java components, with collection of both current metrics and historical statistics to populate dashboards and enable automated alerting.
Collected metrics were forwarded into an Elasticsearch and Grafana driven observability layer, and the environment was integrated with Prometheus, OpenSearch and Zabbix tools to create unified dashboards across mainframe and distributed platforms. This integration allowed IT operations teams to view mainframe and low-platform indicators in a single pane, and supported alerting workflows for specific conditions such as Db2 archive storage pool growth.
Governance and operational processes were revised to align mainframe monitoring with existing low-end platform processes, professionalizing visualization and standardizing response procedures across ITOPS and Db2 administrators. The unified approach centralized monitoring information and enabled automatic actions for anomalous events regardless of whether the origin was mainframe or distributed infrastructure.
As an explicit outcome Banco de Brasília reported improved operational efficiency, enhanced infrastructure performance and stronger security posture, with an early alert for a Db2 archive storage event preventing a repeat outage. The IBM OMEGAMON Data Provider and the integrated observability stack proved central to making mainframe operating indicators available to all interested parties and to operationalizing proactive monitoring.
|
 |
C&A Brasil | Retail | 14000 | $1.4B | Brazil | IBM | IBM Z mainframes | Servers, Storage and Networking | 2017 | n/a |
In 2017, C&A Brasil implemented IBM Z mainframes running SUSE Linux Enterprise Server for z Systems to consolidate core SAP, analytics and backup workloads as part of its Servers, Storage and Networking infrastructure. The deployment targeted omnichannel retail processes that support sales, finance and reporting, aligning SAP applications and SAP Business Warehouse with enterprise analytics and mission-critical operations for the company in Brazil.
C&A Brasil centralized functional modules including SAP ERP and SAP Business Warehouse, IBM DB2 for z/OS co-located on the mainframe hardware, and IBM Spectrum Protect as the central backup and recovery solution running on SUSE Linux Enterprise Server for z Systems. The environment also hosted web analytics using Piwik and open source development tools and version control, while the company later moved its Nagios IT management tool from IBM z Systems to x86 to optimize resource productivity.
Architecturally the implementation used Integrated Facility for Linux processors to dedicate Linux workloads on the mainframe, and leveraged HiperSockets for low-latency, high-throughput connectivity between SAP application servers and DB2 for z/OS, removing dependence on slower network links. The project was executed in collaboration with SUSE and partner SVA System Vertrieb Alexander GmbH to consolidate databases and application tiers onto a single high-availability IBM z Systems platform.
Governance focused on platform consolidation to ensure continuous operations for omnichannel sales and reporting, and on enabling portability of Linux applications across hardware for operational flexibility. As described by C&A Brasil, running SUSE Linux Enterprise Server for z Systems on IBM Z mainframes delivered improved application performance for data intensive workflows, stronger reliability for mission-critical SAP operations, and maintained backup and operational continuity through IBM Spectrum Protect.
|
 |
Caixa Econômica Federal (CAIXA) | Banking and Financial Services | 83640 | $11.6B | Brazil | IBM | IBM Z mainframes | Servers, Storage and Networking | 2018 | n/a |
In 2018 Caixa Econômica Federal (CAIXA) acquired six IBM Z14 mainframes as a Servers, Storage and Networking deployment to scale core transaction processing and enable new agile, secure projects for a growing connected customer base. The procurement of IBM Z mainframes emphasized platform-level encryption capabilities, with the Z14 family cited as capable of encrypting 100% of the bank's data, positioning the infrastructure for high-throughput secure processing.
The implementation centered on consolidating high-volume online transaction processing workloads and cryptographic services onto the IBM Z14 hardware, leveraging hardware-accelerated encryption and mainframe resilience features typical of Servers, Storage and Networking class systems. Configuration work focused on throughput optimization and workload balancing to support bank-wide transactional systems and time-sensitive settlement flows.
Operational coverage extended across Caixa’s banking transaction ecosystem, supporting transaction processing and customer-facing services at scale. The IBM Z mainframes were used to centralize critical processing and to underpin new project initiatives that required both encryption-first security and predictable processing capacity.
Governance aligned around platform hardening and operational monitoring to sustain continuous high-volume processing. The deployment coincided with a documented operational milestone, with IT Forum 365 reporting a historic peak of 2.8 billion transactions in a single day, demonstrating the IBM Z14 mainframes handling extreme transactional throughput while maintaining the stated full-data encryption capability.
|
 |
Caterpillar Brasil | Manufacturing | 6000 | $1.8B | Brazil | IBM | IBM Z mainframes | Servers, Storage and Networking | 2000 | n/a |
In 2000 Caterpillar Brasil implemented IBM Z mainframes as part of its Servers, Storage and Networking estate. The IBM Z mainframes were provisioned to host material and manufacturing management and corporate machine order processing applications at the Piracicaba, São Paulo site, operating under a 24/7 support model with Level 2 application support.
The implementation centers on core mainframe capabilities, including COBOL application runtime, IMS transaction processing, IBM Db2 data storage, and batch orchestration using JCL and QUIKJOB, with Fileaid used for offline file manipulation. IBM Z mainframes run the MAMM system for Material and Manufacturing Management and the CMOPS Corporate Machine Order Processing System, reflecting a configuration focused on transaction throughput and scheduled batch processing.
Operational coverage includes continuous incident management and Level 2 support provided by the applications team in Piracicaba, integrating mainframe operations with IT change controls and document management workflows. The deployment supports business functions in manufacturing operations and order processing, and it is instrumented for operational continuity across production schedules.
Governance and control responsibilities tied to the IBM Z mainframes include maintaining ITCG controls, Sarbanes Oxley compliance tasks, and routine updates to team IT controls, alongside incident response and information security practices. Configuration and operational ownership remain concentrated within the applications IT analyst function, which manages configuration artifacts, compliance evidence, and day to day mainframe operations.
|
 |
|
Banking and Financial Services | 230000 | $81.1B | United States | IBM | IBM Z mainframes | Servers, Storage and Networking | 2011 | n/a |
|
|
|
|
Professional Services | 2011 | $1.2B | Brazil | IBM | IBM Z mainframes | Servers, Storage and Networking | 2014 | n/a |
|
|
|
|
Banking and Financial Services | 20000 | $16.1B | United States | IBM | IBM Z mainframes | Servers, Storage and Networking | 2018 | n/a |
|
|
|
|
Professional Services | 3750 | $2.8B | United Kingdom | IBM | IBM Z mainframes | Servers, Storage and Networking | 2021 | n/a |
|
Showing 1 to 9 of 9 entries
Buyer Intent: Companies Evaluating IBM Z mainframes
ARTW Buyer Intent uncovers actionable customer signals, identifying software buyers actively evaluating IBM Z mainframes. Gain ongoing access to real-time prospects and uncover hidden opportunities. Companies Actively Evaluating IBM Z mainframes for Servers, Storage and Networking include:
- GJ Computer, a United States based Professional Services organization with 150 Employees
Discover Software Buyers actively Evaluating Enterprise Applications
| Logo | Company | Industry | Employees | Revenue | Country | Evaluated |
|---|---|---|---|---|---|---|
 |
GJ Computer | Professional Services | 150 | $25M | United States | 2026-03-20 |
FAQ - APPS RUN THE WORLD IBM Z mainframes Coverage
IBM Z mainframes is a Servers, Storage and Networking solution from IBM.
Companies worldwide use IBM Z mainframes, from small firms to large enterprises across 21+ industries.
Organizations such as Citigroup, Synchrony, Caixa Econômica Federal (CAIXA), Amtrak and Travelport are recorded users of
IBM Z mainframes for Servers, Storage and Networking.
Companies using IBM Z mainframes are most concentrated in Banking and Financial Services, Transportation and Professional Services, with adoption spanning over 21 industries.
Companies using IBM Z mainframes are most concentrated in United States, Brazil and United Kingdom, with adoption tracked across 195 countries worldwide. This global distribution highlights the popularity of IBM Z mainframes across Americas, EMEA, and APAC.
Companies using IBM Z mainframes range from small businesses with 0-100 employees - 0%, to mid-sized firms with 101-1,000 employees - 0%, large organizations with 1,001-10,000 employees - 44.44%, and global enterprises with 10,000+ employees - 55.56%.
Customers of IBM Z mainframes include firms across all revenue levels — from $0-100M, to $101M-$1B, $1B-$10B, and $10B+ global corporations.
Contact APPS RUN THE WORLD to access the full verified IBM Z mainframes customer database with detailed Firmographics such as industry, geography, revenue, and employee breakdowns as well as key decision makers in charge of Servers, Storage and Networking.