Types of EDI (Electronic Data Interchange) Expert Guide 2026

The 5 types of EDI: The main types of EDI are Direct EDI (point-to-point), EDI via AS2, EDI via VAN, EDI via SFTP/FTPS, and Web EDI. Direct EDI and AS2 offer the highest control and security and are the default for large retailers like Walmart and Amazon. VANs simplify communication when you trade with hundreds of partners. SFTP/FTPS is low-cost but lacks non-repudiation. Web EDI suits small suppliers without an in-house technical team. Most mature operations now run a hybrid, AS2 for top partners, VAN or Web EDI for the long tail, and APIs for internal systems.

EDI or Electronic Data Interchange is a computer-to-computer communication mechanism for exchanging business documents such as purchase orders, and invoices in a standard electronic format, as an alternative to traditional paper-based communication. There are many different types of EDI software and trading partners are free to interact directly using Direct EDI or through an intermediary such as EDI via AS2, and EDI via SFTP. Out of all the options, every organization should select the best way to send and receive trading documents. Therefore, before investing in EDI infrastructure, it is better to assess the organization’s business requirements, resource availability, technical capabilities and budget allocations. And most importantly, organizations should select an EDI communication option which is strategically and tactically aligning their business requirements and increases efficiencies in the supply chain to allow organizations to gain a competitive advantage over their competitors. Therefore, it is essential to look into each EDI type separately, explore modern trends, and analyze industry usage.

New to EDI? Do not worry. Click here to explore our EDI blog posts to learn more about EDI

The 5 Main Types of EDI Communication

There are five mainstream types of EDI communication. Each differs in security, cost, and how much infrastructure you have to own, here’s how they compare.

Direct EDI: Point-to-Point/Peer-to-Peer

Direct EDI; a.k.a Point-to-Point EDI/ Peer-to-Peer EDI is where trading partners connect directly to each other establishing a single secure connection between the two entities. In this approach, the organization sets up separate connections between each trading partner and connects directly via the internet using the mutually agreed EDI protocol. Since no intermediaries are involved, the organizations have more control over their communication channels and out of the other options, this is the most secure form of EDI communication in general. This EDI type is most commonly used by large corporations such as Walmart that exchange a high volume of EDI files, frequently with their trading partners.

However, since the organization sets up individual connections with the trading partners, this EDI type can become complex and resource-intensive. Normally, different EDI trading partners use separate EDI protocols, languages and EDI standards when communicating with the corresponding trading entity. Normally, this is the general practice in EDI trading. Therefore, the system should have the potential to support all of those protocols, languages and EDI standards. It might be costly for the organisation since they have to map each trading partner separately. Large organizations like Walmart might have to manage thousands of separate EDI connections and they may even need a dedicated technical team with the expertise to handle these EDI configurations and maintaining such an in-house team with the right expertise is indeed a challenge. For the organizations that don’t have the right in-house team, this option may not be the best fit.

EDI via AS2

This is one of the most popular methods out of all the EDI types and Walmart is one of the main organizations that uses AS2 for its EDI communications. AS2 behaves as an “envelope” for the EDI data, enabling a better way to send and receive data securely and directly using digital certificates and encryption via the internet using HTTP connections through a certified server.

Not only EDI software, but AS2 can also handle any type of file format and mandate message disposition notifications (MDNs) as an acknowledgement for the organization when a document has been accepted by the corresponding trading partner. According to the technical behaviour of AS2, it requires an active server on the message receiver’s end that listens for messages sent to it. If the receiving organization’s server is not available at the moment the message has been transmitted, according to the AS2 specifications, the sender’s trading system will retry the message, so the receiver won’t miss the message.

There are many service providers in the market that offer EDI via AS2 and due to the secure transmission, simplicity and cost-effectiveness, AS2 is considered by many organizations as the best way to communicate with EDI trading partners.

EDI via VAN

Instead of managing multiple EDI direct connections, an organisation can opt for an EDI VAN (value-added network), which is a secure network that provides partner connections and efficiently delivers EDI transactions through a single connection. The EDI VAN provider will provide a mailbox for each organization where the EDI documents are sent and received. Normally the service provider will enable alerts for incoming messages or organisations can periodically check this mailbox to retrieve received EDI documents. Similar to incoming messages, once a message is successfully sent, the organization will be notified about that as well.

When the organization has to manage a large number of different relationships within the supply chain, this option would be more efficient and cost-effective compared to Direct EDI software because of the centralized system with multiple connectivity options and flexibility to expand, support of multiple protocols, fast message delivery, etc. However, this will reduce the degree of control since a third-party VPN provider is involved and the organization has to ensure all the trading partners support EDI via VPN.

EDI via SFTP, FTPS

This EDI type provides point-to-point connectivity to organizations to enable secure file transferring between networked hosts. Here the organization sends and receives EDI documents with a direct SFTP/FTPS connection established with the EDI trading partner or as well as via EDI network service providers. This method can be considered secure and reliable. However, non-repudiation and interoperability are not addressed by this method.

Explore how SFTP compares to AS2

Web EDI

In Web EDI, EDI communication is conducted through a browser. Here a web form will contain fields where users can enter information. Once the user adds all the required information to the form, it will be automatically converted into an EDI message. Then it will be sent via secure internet protocols like AS2, HTTPS and FTPS. Because of the simplicity, Web EDI can be used to communicate with all business partners including small and medium-size businesses where technical expertise is lacking. Since it is completely browser-based, the organisations don’t have to worry about the complex installation and maintenance of EDI software.

The Foundation of Web EDI is the ‘hub and spoke’ model, where the main organization perform as the hub and the small business partners of that organization act as the spokes. Here, the main organization implements EDI and develops a web application where the small business partners can connect to that application via web browser and fill in data. Then those data will be converted to EDI documents and transmitted to the main organization.

Modern Trends in EDI

Cloud-based EDI software has become increasingly popular because they eliminate the need for companies to maintain complex infrastructure. Providers now offer managed services that support multiple communication methods such as AS2, VAN, and APIs, all within a single platform. For example, a mid-sized retailer can onboard new suppliers quickly by using a cloud EDI portal, rather than building direct point-to-point connections. This flexibility makes cloud EDI software, especially attractive for businesses that need scalability without heavy upfront investment.

Another trend is API-driven EDI, where REST and JSON APIs are used alongside traditional standards. APIs allow real-time data exchange, which is crucial for industries like e-commerce and logistics. Many organizations adopt a hybrid model, using AS2 for large partners, Web EDI for smaller suppliers, and APIs for internal systems. This layered approach ensures both compliance and agility.

Security and Compliance in EDI

As global regulations tighten, security has become a central concern in EDI. Standards like GDPR in Europe and CCPA in California require strict data protection measures. Encryption, digital certificates, and secure key management are now mandatory for most organizations. AS2 remains a preferred method because it supports non-repudiation through Message Disposition Notifications (MDNs), which provide legal proof of delivery.

Healthcare organizations, for instance, must comply with HIPAA, which mandates secure transmission of patient and insurance data. Logistics companies also rely on secure protocols to protect sensitive shipment details. In this environment, businesses cannot afford to treat EDI security as optional, it is a compliance requirement and a competitive necessity.

Learn more EDI in Healthcare - How to maximize your efficiency

Industry Use Cases

EDI adoption varies across industries, but its importance is universal. In retail, giants like Walmart and Amazon rely heavily on AS2 to handle millions of transactions daily, ensuring suppliers can meet strict compliance requirements. In healthcare, EDI is essential for transmitting insurance claims and patient records securely, with HIPAA compliance driving adoption.

Read more Walmart’s EDI Requirements: A Guide for Suppliers

Logistics companies often prefer VANs because they simplify communication across multiple carriers, brokers, and shippers. Manufacturing firms in Europe typically use EDIFACT, while North American companies rely on X12. These standards reflect regional preferences but serve the same purpose: enabling efficient, standardized communication across complex supply chains.

Read more Amazon EDI Requirements: A Complete Expert Guide for Suppliers

X12 vs. EDIFACT

X12 and EDIFACT are the two dominant EDI standards, each with its own strengths. X12, developed by ANSI, is widely used in North America, particularly in healthcare and retail. EDIFACT, endorsed by the United Nations, is the international standard and is prevalent in Europe and Asia.

The key difference is in syntax and segment structures. X12 uses a more strict format, while EDIFACT is flexible and designed for global interoperability. Businesses expanding internationally often need to support both standards. Choosing between them depends on trading partner requirements, industry norms, and geographic reach. In practice, many organizations implement both to ensure seamless global operations.

Future of EDI

The future of EDI is being shaped by emerging technologies. Artificial intelligence and machine learning are increasingly applied to transaction data, enabling predictive analytics for demand forecasting and inventory optimization. Blockchain offers the promise of immutable transaction records, enhancing transparency and trust in supply chains.

IoT integration is another frontier, where sensor data from shipments and warehouses feeds directly into EDI transactions. This allows real-time updates on inventory levels, shipment conditions, and delivery timelines. These innovations do not replace traditional EDI but complement it, making data exchange smarter, faster, and more reliable.

Practical Guidance for Businesses

For small businesses, Web EDI or cloud-based solutions are often the best starting point, as they require minimal technical expertise and infrastructure. Larger enterprises should consider AS2 or VANs, which provide scalability and compliance features. A hybrid approach is often the most practical, allowing organizations to tailor solutions to different partner needs.

Migration strategies should focus on gradual adoption, starting with critical partners and expanding outward. Testing and validation are crucial, every trading partner may have unique requirements, and ensuring compliance before rollout prevents costly errors. Ultimately, the right EDI strategy balances cost, compliance, and flexibility, positioning businesses for long-term success.

Frequently Asked Questions

Which type of EDI is the most secure?

Direct EDI and EDI via AS2 are the most secure mainstream options. Both use end-to-end encryption and digital signatures, but AS2 adds non-repudiation through Message Disposition Notifications, which give legal proof of delivery. SFTP secures the connection but doesn’t provide message-level non-repudiation. VANs are secure but introduce a third-party dependency. For regulated industries, pharma, healthcare, FDA submissions, AS2 is the default for a reason.

What is the difference between EDI via AS2 and EDI via VAN?

AS2 is a peer-to-peer transport protocol, you connect directly to your trading partner over the internet using HTTPS, encryption, and digital certificates. A VAN (Value-Added Network) is a third-party intermediary that operates a hub-and-spoke mailbox model, you send to the VAN, the VAN routes to the partner. AS2 is cheaper at scale and gives you more control; VANs are simpler when you trade with hundreds of partners on different protocols.

Is SFTP a real type of EDI?

SFTP is a transport protocol, not an EDI standard. You can move EDI documents (X12, EDIFACT) over SFTP just as you can over AS2, the EDI content is the payload, SFTP is the envelope. It’s cheap and reliable, but it doesn’t provide non-repudiation, which is why retailers like Walmart and Amazon mandate AS2 instead.

Do small businesses need full EDI software, or is Web EDI enough?

Web EDI is usually enough for small suppliers that send fewer than 100 transactions per month and don’t have their own ERP integration. It runs in a browser, requires no software install, and your retail partner typically provides it. Once volume crosses ~500 transactions per month or you need automated integration with QuickBooks, NetSuite, or SAP, you’ve outgrown Web EDI and need a cloud EDI platform.

Will APIs replace traditional EDI?

No, but they will sit alongside it. APIs are excellent for real-time data exchange and internal systems integration, but trading partners, especially large retailers and regulated industries, still mandate AS2, VAN, or AS4 for compliance and audit reasons. The pragmatic 2026 architecture is hybrid: AS2 (or AS4) for partner-facing transport, APIs for internal orchestration.

Is AS4 considered a type of EDI?

AS4 is the successor to AS2, same purpose (secure B2B document exchange), newer foundations (web services standards, ebMS 3.0). It’s mandated for EUDAMED medical device registration in the EU from May 2026 and is the transport behind PEPPOL e-procurement. If you’re doing cross-border European trade or healthcare, AS4 is becoming a sixth “type of EDI” in everything but name.

Summary

There are several EDI types in the market and each one has its own set of benefits and drawbacks and suitability for the different business cases. Therefore it is essential to find out which EDI type is more suitable for the organization. Most of the time organizations are unable to find one solution which’s the best fit for their organization out of the available EDI types. Therefore, unlike sticking to one EDI software, many larger organizations go for hybrid solutions according to the required volume, frequency of transactions, importance, etc. Therefore, the success of the implementation depends on the selection of the right implementation.

Do EDI Better, Send and receive EDI files like emails

Not sure which type fits your trading partners? The EDI Generator handles AS2, SFTP, and Web EDI in one platform. Start a free 30-day trial, no credit card required.