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Custom code integration vs middleware solutions

Written by
Saad Merchant
Published on
May 6, 2024
Updated on
September 24, 2024

System integrations play a crucial role in the digital transformation of businesses, which involves connecting all disparate applications and data sources, as well as new cloud apps, SaaS solutions, and the latest tech. So, what are the best integration methods that modern businesses should consider? While the traditional method involved developing custom system integration with code, middleware integration solutions like ESB systems soon provided alternative integration methods. Most recently, the advent of a next-gen, no-code or low-code integration platform called the iPaaS (integration Platform as a Service) introduced API-driven middleware. This makes it all the more crucial for modern businesses to discern the differences and benefits of building integrations with middleware software versus custom code.

Understanding integration methods: custom code vs middleware software

In the quest to accelerate digital transformation and be data-driven, modern businesses seek various data and application integration methods. The methods of integration now determine how they automate workflows, consolidate customer data, and streamline operations, apart from helping connect disparate software systems and new SaaS solutions and cloud applications.

As a result, businesses need to choose to develop custom system integration with code or to implement a middleware integration solution based on their digital growth strategies. While custom code integrations offer a more customizable and exclusive solution, middleware software provides a faster, more flexible, and scalable integration solution. Let’s explore the difference between these methods of integration!

What is custom code or point-to-point integration?

Point-to-point integration, or custom code integration, involves writing bespoke code to connect applications. It helps build highly customized integration to meet specific business requirements, and it is ideal when businesses need to connect no more than two applications. Developers have full control over the integration process, enabling them to fine-tune performance and address specific use cases effectively.

However, the pros of custom code integration are also a double-edged sword since building, managing, and monitoring them requires skilled (and expensive) developers, leading to increased development time and associated costs. Since custom code integrations are point-to-point solutions, scaling up with new integrations or accommodating changing data volumes becomes increasingly difficult. As these point-to-point integrations grow over a period of time, the consistency of the custom code becomes more challenging to maintain.  

What are middleware integration solutions?

Middleware integration solutions are software intermediaries that bridge communication gaps between disparate applications. They utilize standardized protocols and message formats (e.g., APIs, JMS, SOAP) to translate data structures and facilitate message routing between applications. This enables applications to exchange information seamlessly, even if they were built on different platforms or utilize unique data models. Middleware software can also handle complex transformations and manipulations of the data being transferred, ensuring its compatibility with the receiving application.

The different types of middleware solutions

Middleware integration solutions have evolved significantly over the years, adapting to the changing landscape of technology and business needs. Initially, middleware primarily focused on providing connectivity and data exchange between disparate systems within an organization. Early solutions, such as Message-Oriented Middleware (MOM) and Enterprise Service Bus (ESB) systems, laid the foundation for seamless communication between applications, databases, and services. These technologies introduced standardized protocols and messaging formats, enabling organizations to streamline their integration processes and improve interoperability.

However, the advent of cloud-based technology and APIs (Application Programming Interfaces) revolutionized middleware software solutions. This led to the innovation of a next-gen integration solution called the iPaaS (integration Platform as a Service). This cloud-based API-driven middleware software helps connect multiple systems seamlessly via a user-friendly interface without the need for complex custom code. The iPaaS is designed to be a middleware integration solution that solves all the challenges of point-to-point integrations vs custom code.


Read more about
the different types of middleware software and the iPaaS →

Benefits of middleware vs point-to-point custom code integration

While custom code point-to-point integration solutions offer great customizability, integration best practices declare middleware software solutions as the more practical and cost-effective solution for modern integration projects. Here's a breakdown of the key advantages middleware integration solutions provide:

  1. Faster integration deployment: Middleware solutions provide pre-built connectors, adapters, and templates that speed up and streamline the integration process. Providing visual development tools to create integrations without the need for extensive coding work, middleware software accelerates development timelines. In contrast, custom code integrations require manual development and testing processes, which increases time-to-market
  2. Save cost on skilled resources: By eliminating the need for extensive coding expertise to develop and orchestrate integrations, middleware software significantly reduces development time and the associated costs for hiring and managing developers. A no-code or low-code integration platform like the iPaaS can be used by junior developers or non-coding data experts to govern and troubleshoot integrations, and it helps automate error detection in real-time, minimizing maintenance costs.  
  3. Scalability and flexibility: Middleware integration solutions are designed to scale effortlessly to accommodate growing data volumes, transaction volumes, and user loads. They offer built-in scalability, ensuring optimal performance under varying workloads. Additionally, middleware platforms support a wide range of integration scenarios, including cloud-to-cloud, cloud-to-on-premises, and hybrid integrations, providing the flexibility to adapt to evolving business requirements.
  4. Lower maintenance overheads: Middleware solutions abstract the complexities of integration, reducing the maintenance burden on development teams. Updates, patches, and enhancements are managed by the middleware provider, ensuring that integrations remain up-to-date and compatible with evolving technologies. This frees up resources to focus on core business activities rather than routine maintenance tasks. In contrast, custom code integration solutions require ongoing maintenance and support, as any changes or updates must be manually implemented and tested by internal development teams.
  5. Support for advanced integration features: Middleware platforms offer advanced features and capabilities that may not be feasible or practical to implement with custom code. These include data mapping and transformation, real-time monitoring and analytics, error handling, and retries. By leveraging these features of middleware software, organizations can build scalable, flexible, and future-proof integration needs that meet the demands of modern business environments.
  6. Standardized security and governance: Many middleware solutions offer built-in security features, ensuring data encryption, access control, and audit trails for secure data exchange between applications. This becomes a significant advantage over custom code, where security needs to be manually implemented and maintained, increasing the risk of vulnerabilities. Centralizing data access from across all connected apps and data helps eliminate data silos and comply with privacy legislation like GDPR.


Read more about how building integrations with the iPaaS compare with point-to-point integrations →

Choosing between middleware software and custom code integrations

In the dynamic landscape of software integration, choosing between these different methods of integration plays a crucial role in achieving operational efficiency, driving innovation, and staying ahead of the competition. While custom-coded, point-to-point integrations offer flexibility and control, middleware integration solutions provide a streamlined and scalable approach to integration, offering faster deployment, reduced maintenance overheads, and improved interoperability.

In the context of digital transformation, industry best practices increasingly require businesses to implement and integrate a multitude of best-of-breed applications and software solutions. Connecting two or major monolithic systems in a point-to-point to manage all operations isn’t enough; rather, businesses now need to be agile and composable with their tech stacks, freely changing their integrated systems without loss of data integrity. This is where middleware integration solutions shine, offering a flexible and scalable approach to integrating diverse applications seamlessly. By adopting middleware software, businesses can future-proof their integration strategies, and adapt to evolving technology landscapes, and stay ahead of the curve.

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Portrait of Leonie Becher Merli, 
Business Development Representative, Alumio, point to the right with both hands -  within a white circular background.

Get a free demo of the Alumio platform

to experience the business automation benefits!