Diasoft Explained Why It Chose Digital Q.Integration Platform over Traditional ESB

Viktor Ovchinnikov, head of development of the Digital Q.Integration integration platform at Diasoft, explained why the team rejected the classical ESB (Enterprise Service Bus) architecture in favor of their own approach to corporate systems integration.

Why Classical ESB Didn't Work

According to Ovchinnikov, the classical ESB bus is designed as a monolithic core with only vertical scaling: you can only increase performance by purchasing more powerful hardware, not by adding new nodes. If such a core fails, the entire integration stops — none of the connected systems can exchange data with each other.

But the most painful operational problem, in the author's view, manifests not immediately, but gradually. Over time, the bus becomes a place where all of the company's applied business logic flows. After several years, the ESB knows more about the company's business than any of the systems connected to it — and figuring out this logic becomes a separate complex task.

What Approach Diasoft's Team Chose

The team formulated a different principle for themselves: to take the best from point-to-point architecture and from classical ESB. On one hand — independent services without centralized business logic, as in direct point-to-point integrations. On the other — shared transport, shared monitoring, and shared tools, as in traditional buses. The concept was named "smart services and reliable channels."

• Classical ESB scales only vertically and represents a single point of failure
• Over time, ESB accumulates all of the company's applied business logic
• The Digital Q.Integration platform is built on the "smart services and reliable channels" approach
• For each integrated system, a separate microservice connector is created
• Adapters communicate through a common transport layer responsible for delivery and reliability

How the Platform Architecture Works

For each integrated system, the platform creates an independent microservice connector. It contains only the logic needed to interact with this specific system — and nothing extra. Such a connector does not know about the business processes of other systems and does not become a centralized source of knowledge about the company.

Adapters communicate with each other through a separate transport layer, which is responsible for message delivery and data exchange reliability. This separation removes the main contradiction of classical ESB: previously, the bus simultaneously solved business logic and transport tasks, which caused two different types of responsibility to mix in one monolithic core. In Diasoft's approach, these tasks are separated — business logic lives in independent microservices, while delivery and reliability are provided by a common layer.

How This Differs from Simple Point-to-Point

Direct system integration "point-to-point" solves the monolithic core problem — it is inherently distributed, and the failure of one link does not bring down the entire network. But point-to-point has a downside: without a common transport and monitoring layer, the number of direct connections between systems quickly becomes an unmanageable tangle, and tracking which system exchanges data with which becomes as difficult as sorting through the logic of a monolithic ESB. Diasoft's approach takes the distributedness of point-to-point, but adds to it a unified transport layer and common monitoring, which are absent in pure point-to-point architecture.

What This Means

Diasof's approach is an attempt to remove the main pain point of classical ESB: the transformation of the bus into an opaque monolith that over time begins to know more about the business than the integrated systems themselves. For companies building AI projects and other digital services on top of multiple corporate systems, independent microservice connectors reduce the risk that the integration layer itself will become a bottleneck and source of opaque, difficult-to-maintain business logic.