EDI vs. API for B2B integrations: Which should you choose?

B2B integrations are crucial for modern businesses to facilitate smooth, efficient, and rapid data exchange between partners, vendors, and customers. The two primary methods for these integrations are Electronic Data Interchange (EDI) and Application Programming Interface (API). Here’s a deep dive into both, understanding their strengths, weaknesses, and how to choose between them.

What is EDI?

EDI (Electronic Data Interchange) is a set of standards for structuring information to be electronically exchanged between and within businesses. It’s been around for several decades and has been widely adopted in industries such as retail, shipping, and healthcare.

  • Mature & stable: Given its longevity, EDI is a tried and true method with established standards and processes.
  • Widespread adoption: Many legacy systems in various industries have built-in EDI support, making it a default choice for some businesses.
  • Batch processing: It’s efficient for processing large batches of data at once.
  • Complexity & cost: Setting up and maintaining an EDI system can be complex and costly, especially for smaller businesses.
  • Rigidity: EDI can be inflexible due to its standardized nature. Any change or customization can require a significant amount of work.
  • Speed: EDI often operates on scheduled times, which might not be ideal for real-time data needs.

What is API?

API (Application Programming Interface) allows different software applications to communicate with each other. It’s a set of rules and protocols for building and interacting with software applications.

  • Real-time data exchange: APIs can facilitate immediate data exchange, which is crucial for applications requiring real-time updates.
  • Flexibility: APIs are generally more flexible and can be tailored to specific needs, facilitating custom integrations.
  • Scalability: Modern APIs, especially RESTful ones, are built for the internet age and can scale efficiently with demand.
  • Integration with modern tech: APIs easily integrate with cloud platforms, mobile applications, and other emerging technologies.
  • Maintenance: As APIs are exposed to the internet, they require rigorous security measures and regular updates.
  • Dependency: If a third-party API goes down or changes without notice, it can disrupt the services relying on it.
  • Complexity: Building and maintaining a robust API infrastructure might demand significant technical expertise.

EDI vs. API: When to use which?

  • Legacy systems: If you’re dealing with legacy systems, especially in industries that heavily adopted EDI, it might make more sense to stick with EDI due to compatibility and established workflows.
  • Real-time needs: If your application requires real-time data exchange, then APIs are the way to go. Examples include real-time inventory updates or instant order placements.
  • Custom integrations: If you need a bespoke integration tailored to specific requirements, APIs provide that flexibility, whereas EDI might be restrictive.
  • Batch data processing: If you’re dealing with massive batches of data that don’t require instant updates, EDI can be efficient.


While EDI offers stability and broad acceptance, especially among older, established industries, API provides flexibility, scalability, and real-time capabilities. The choice between the two often comes down to the specific needs of the business and the systems they’re already using.

However, it’s worth noting that many modern businesses leverage a hybrid approach, using EDI where it makes sense and incorporating API for newer, real-time applications. As with any technology decision, understanding your business needs and the landscape of your industry is crucial.