VAN vs. AS2: Choosing the Right EDI Connection Method

When you’re setting up EDI with a new trading partner, you’ll be asked to choose a connection method. The two main options are VAN (Value-Added Network) and AS2 (Applicability Statement 2). Each has advantages depending on your situation.

Value-Added Networks (VANs)

A VAN is an intermediary network — think of it as an EDI post office. You send your documents to the VAN, and the VAN routes them to the correct trading partner.

Advantages of VAN:

• One connection gives you access to thousands of trading partners
• Built-in message queuing and retry
• No need to manage individual connections
• Strong audit trail for all transmissions

Disadvantages of VAN:

• Per-transaction fees add up at volume
• Transmission delays (usually minutes, not seconds)
• Some retailers no longer accept VAN connections

Best for: Suppliers with many trading partners who want simplified management.

AS2 (Direct Connection)

AS2 is a direct, encrypted connection between your system and your trading partner’s system — no intermediary.

Advantages of AS2:

• Real-time transmission (seconds vs. minutes)
• No per-transaction VAN fees
• Required by most major retailers (Walmart, Amazon, Target)
• Better for high-volume, time-sensitive transactions

Disadvantages of AS2:

• Each trading partner requires a separate connection
• Technical setup is more complex
• Requires certificate management

Best for: Suppliers with high-volume relationships with major retailers who mandate AS2.

The Hybrid Approach

Most established suppliers use both: AS2 for major retailers who require it, and VAN for smaller trading partners or those without AS2 requirements. Spring Systems manages both connection types on your behalf.