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  • Writer's pictureJohn Smith

How to Connect Legacy Systems with Modern Platforms?

Daily operations can only be performed with ML, automation, and big data analytics. Though, companies that use outdated infrastructure systems will only enjoy some of the benefits of those modern technologies. Businesses waste approximately 60% of their IT expenditure on the upkeep of obsolete networks but still need access to their full potential. 

Legacy system integration with modern software is a solution to fill the gap. Continue scrolling down to find out more about legacy system integration, its benefits, drawbacks and other features.

The definition of legacy systems

A legacy system is an obsolete software or hardware that is still in use today despite the availability of modern choices. These systems are usually fundamental to critical business processes, making upgrading both complex and necessary. Such systems include the following features:

  • It isn't easy to integrate with updated software or hardware.

  • Costly and complex requirements for maintenance.

  • Limited assistance from the original suppliers.

  • Higher probability of breakdowns and security problems.

When deciding to replace such systems, examine not only the immediate expenses but also the potential ones for increased efficiency and new possibilities provided by technological advancements.

The peculiarities of legacy system integration

As Deloitte presents, one of the primary challenges in data management is dealing with the increasing data volume (45%). This is followed by the adaptation to changing regulations, and the finishing touch is the rising costs and complexities associated with data privacy (18%).

Legacy software system integration might provide a viable answer to these concerns. Here are specific scenarios where integration might be particularly beneficial:

  • The company's system holds massive volumes of critical historical data, and moving it might be extremely costly given the drawbacks of older technology. Pairing this with a contemporary system might maximize the information's worth.

  • The network has unique features that are vital to the business's continuous operations. It keeps creating value while efficiently doing the duties for which it was initially built.

  • A new merger with another firm. However, a quick migration to a newer system is not possible due to several of the previously listed factors.

  • The system works well or has a large quantity of valuable data, but there is a need to improve it by adding a few new features.

  • When the appliance is efficient and capable of storing large amounts of data, it might benefit from a more streamlined interface.

  • The company's system runs smoothly and includes valuable information, but it must be shared with other systems to fulfil legal and regulatory demands.

  • If there's an extensive data library that requires robust security mechanisms and policies to secure it throughout transfers and connection to other systems.

Complexities of legacy system integration

Integrating legacy systems with modern IT setups is not as straightforward as it seems and can pose several challenges.

Employees may be resistant to new changes in their typical routines. Therefore, it is critical to state explicitly the positive effects associated with integration and facilitate the transition period.

Legacy data often comes short of modern requirements, demanding extensive upgrades and cleansing for successful integration.

Outdated programs are more vulnerable to cyber attacks, and connecting them can exacerbate these risks.

Legacy applications frequently lack thorough documentation, which complicates the integration, mainly when the initial programmers are no longer accessible.

The knowledge required to operate with obsolete technology is becoming increasingly scarce, which might hamper integration attempts.

These factors significantly challenge the integration of old and new software systems but do not make it impossible.

The most effective ways to integrate obsolete systems with modern apps

Creating APIs enables accessible communication across existing and more recent systems. This allows for data exchange and functionalities without replacing the entire system.

Middleware acts as a liaison between obsolete systems and modern technology. This strategy is less invasive and more cost-effective for merging systems.

By progressively swapping elements of the current system with newer technology, companies can reduce the probability of an entire system failure and allow for a more gradual transition.

Transferring old systems to the cloud improves scalability, flexibility, and security. This uses cloud computing's enormous capabilities to help businesses run more efficiently.

Use P2P integration. It is frequently applied when multiple systems share information or communications without requiring sophisticated management or mediation. This is a software integration method in which two systems connect directly, eliminating the need for a central hub or middleman.

iPaaS platforms offer a cloud-based solution for integrating historical and current applications, systems, and databases.

They typically have built-in connectors and adaptors for linking to a wide variety of legacy applications, making it easy to create connections and transfer data between systems.


Legacy systems integration with modern applications is essential for businesses that wish to leverage their historical data while embracing the advantages of today's technology. Especially if the resources are limited, this is the only way.

This journey won't be easy as there are specific challenges. However, the approach involves understanding both the complexities and the solutions to facilitate a seamless transition. The rewards in efficiency, security, and operational continuity can change the future of an enterprise.

If you're ready to take the next step in modernizing your legacy systems, can help. With expertise in advanced technical solutions and a deep understanding of legacy integration, it provides services to bridge the gap between technologies. Hit contact to discover how to transform the business operations.


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