10 Best System Integration Companies

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In 2025, the global system integration was sized at $590.09 billion and is expected to grow at a CAGR of 14.18% from 2025 to 2034. But why is it so important that businesses are ready to invest billions of dollars in this process?

In this blog, I will take you through system integration, its working, its benefits, and the top 10 best system integration companies.

What is System Integration & How Does it Work?

Do you remember working at college fests or school annual programmes? There used to be separate departments and teams for each job, like finance, arts, decoration, backstage, management, etc. And the center point for each one was the principal. You can assume the same for business, where each department is a software, hardware, and IT system, and system integration is the principal connecting these various departments to support faster, lower error rate, and seamless workflow.

System integration solves the problem of entering the same data multiple times, as these systems work in silos. For example, when a customer places an order online, the data is automatically updated in the company’s inventory, finance systems, and also gets notified in the logistics department, all in one go, without each department needing to enter it separately all over again.

System integration basically makes different technologies ‘talk’ to each other.

List of Top 10 System Integrator Companies

10. DXC Technology

Headquartered in Ashburn, Virginia, USA, DXC Technology is a global IT services and system integration company. DXC is skilled in hybrid cloud and multi-cloud management, AI & analytics, cyber security, and enterprise modernization. It has an annual revenue of US$13 billion with around 125,000 employees. The company is a key player in outsourcing and system integration services. It has recently faced a reduction in headcount, and execution remains a critical factor for DXC with its reshaping efforts and a sharper focus on AI & cloud.

9. NTT DATA

NTT DATA is a Tokyo-based IT & business service firm. The company’s USP is its ‘social infrastructure handling’ and large-scale systems. With its approx 197,800 employees, it generated consolidated net sales of approximately US$30.4 billion for the fiscal year ending March 31, 2025.

8. Infosys

India-based leading IT service and consulting firm with 323,578 employees as of 2025. Infosys specializes in strong digital transformation, robust R&D in upcoming technologies, and consistent large-scale enterprise projects. It serves clients across industries and sectors. Despite being an internationally recognized and well-established company, it has potential fallbacks due to heavy reliance on North American and European markets.

7. Cognizant

Cognizent Technology Solutions is one of the most prominent companies in the IT and consulting domain. The revenue of Cognizent was reported $19.7 billion in the 2024 fiscal year, with a 2.0% increase year-over-year according to the company’s reports. The company offers Cloud services, AI, enterprise modernization, and digital engineering. They have key partnerships with AWS, Google Cloud, Microsoft, SAP, and Salesforce.

6. Capgemini

One of the most well-known and leading names in technology, consulting, and digital transformation services, Capgemini is a company from Paris, France. The company reported a revenue of $25.8 billion with a slight decline of 1.9% yearly. Though the operating margin is stable at 13.3%. Cognizant strengthens in cloud, AI, enterprise modernization, along with cybersecurity. The company’s fortified yet mapped investment in Gen AI accounts for the company’s 4% booking.

5. PwC

Who doesn’t know PwC, a renowned service provider in the market and one of the Big Four? The company is not only recognized for its professional services but a key player in the system integration and digital transformation domain. PwC has a workforce of over 370,000 with a reported revenue of USD$55.4 billion in FY ending for 2024.

PwC ensures effortless and unhindered data flow with operational efficiency by cloud platform integration, legacy systems, AI-driven analytics, and cybersecurity frameworks. It spans system integration in ERP implementation, enterprise modernization, process automation, and managing IT services.

Partners include Microsoft, SAP, Oracle, and Salesforce for large-scale integration deliveries. PwC offers services in various industries, including banking, healthcare, and manufacturing.

4. Tata Consultancy Services (TCS)

TCS is a worldwide pioneer in IT services and consulting with employees across 46 countries. The company is an all-inclusive suite for system integration, providing cloud migration, enterprise application integration, and network modernization.

TCS’s proficiency in integrating cloud solutions is highlighted by its 950+ Azure engagements and being a Microsoft Azure Expert Managed Service Partner.

3. IBM Global Services

IBM is a New York-based top-known company in IT services and consulting. The company helps businesses with system integration to automate operations, cloud migration, API management, enterprise messaging, and event-driven automation.

IBM Cloud Pak for Integration is a flagship platform by the company that harnesses AI-powered automation, connecting data and applications across hybrid environments. IBM offers a number of integration patterns such as API-led, B2B, and event-driven architectures.

2. Deloitte

Deloitte, headquartered in New York, with a workforce of over 460,000 globally, has reported a revenue of US$67.2 billion in 2024.

It provides system integration services in cloud adoption, enterprise application integration, AI analytics, and cybersecurity. SAP, Oracle, Microsoft, and Salesforce are the key partners of Deloitte, helping deliver large-scale integrations and digital transformation.

Deloitte’s strengths lie in large-scale digital transformation projects in finance, healthcare, and government.

1. Accenture

Accenture is a global powerhouse in the list of system integrators and digital transformation firms. It combines cutting-edge AI, cloud, and cybersecurity expertise with exceptional delivery at a global scale.

To execute huge and multivendor integration projects with operational efficiency and innovative strategy, Accenture is a go-to choice for companies. It doesn’t just connect systems but reinvent the workflow, fueling faster decision-making, streamlining operations, and giving an uninterrupted digital experience in the workplace.

Accenture’s revenue for FY 2024-2025 was US$68.48 billion, reported by StockAnalysis.

Why You Can’t Ignore System Integration?

System integration is inevitable in the changing work environment, where time efficiency with accuracy is highly demanded. Time is money, and business is all about it. Today, no business can afford to complete a task in 8 hours that can be completed in an hour, and system integration is the process that makes it possible. By ensuring commendable fluidity of data across departments and applications.

You can’t sleep on system integration, where brands like Volkswagen have experienced IT maintenance cost savings of $4.7 billion USD by investing $1.4 billion USD in system integration. Another example where Penske Truck Leasing used AI-driven integration to monitor thousands of vehicles and boost efficiency by cutting down time. System integration is also helpful in enhancing customer experience and enabling agility in chained business processes.

So yes, system integration is a game-changer, empowering businesses to operate smartly in a scalable and faster way.

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