40+
Peppol countries
40%
YoY network growth
€0
Vendor lock-in cost
1
Format standard (UBL)
Every organisation evaluating e-invoicing infrastructure faces the same fork in the road: adopt the Peppol open network, backed by governments and growing at 0% year-on-year, or stay with a proprietary EDI network that's familiar but increasingly misaligned with where regulation is heading.
This isn't just a technology decision — it's a strategic one. The EU's ViDA directive, ZATCA in Saudi Arabia, and FTA in the UAE are all converging on Peppol as the backbone. Meanwhile, proprietary platforms are charging per-transaction fees for bilateral connections that governments no longer require. Let's break it down.
The Architecture Choice
At its core, this is a choice between two fundamentally different network architectures. Understanding the topology explains almost every advantage and disadvantage.
Peppol: Mesh Network
An open, federated network where any certified Access Point can communicate with any other. One connection gives you access to every participant in 0+ countries. Think of it like the internet — you don't need a separate agreement with every website.
Proprietary: Hub & Spoke
A centralised platform owned by a single vendor. Each trading partner requires a bilateral connection established through the hub. You can only reach partners that are on the same network — like a private telephone exchange.
The Network Effect
Peppol's value grows with every new participant — you automatically gain reach to new trading partners without any additional setup. Proprietary networks have an inverse problem: each new partner requires negotiation, onboarding, and often a separate fee.
Peppol Deep Dive
The Pan-European Public Procurement Online (Peppol) network was originally created for government procurement but has evolved into the dominant global standard for B2B e-invoicing. Here's what makes it compelling — and where it has limitations.
Advantages
Peppol is governed by OpenPeppol, a non-profit. You can switch Access Points without losing connectivity. Your data, your format, your choice.
The EU’s ViDA directive mandates Peppol for cross-border B2B invoicing from 2028. ZATCA and FTA are already onboard. Compliance and connectivity in one network.
UBL 2.1 and CII are the only formats you need. No proprietary schemas, no bespoke mappings per trading partner. One invoice format works everywhere.
Flat-rate Access Point fees instead of per-transaction pricing. No bilateral setup costs. An SME sending 100 invoices/month pays the same as one sending 10,000.
Peppol processed over 1.3 billion documents in 2025. The network is growing faster than any proprietary alternative, which means more partners reachable every quarter.
The Service Metadata Publisher lets you discover any Peppol participant by their identifier. No manual onboarding — just look them up and send.
Limitations
You can’t connect to Peppol directly — you need a certified AP like InvoStaq. This is by design (quality control), but it’s an extra dependency.
While Peppol covers 40+ countries, some regions (parts of Asia, Latin America) are not yet on the network. Coverage is expanding rapidly, but it’s not universal today.
Peppol enforces UBL 2.1 and CII standards. If you have legacy systems that produce EDIFACT or X12, you’ll need format conversion at the AP layer.
Proprietary EDI Analysis
Proprietary EDI networks — platforms like traditional VAN providers — have been the backbone of B2B document exchange for decades. They're established, deeply integrated with specific supply chains, and still dominant in some industries. But the landscape is shifting.
Advantages
Proprietary EDI platforms have been running for 20-30 years. They’re stable, well-understood, and deeply embedded in industries like automotive and retail.
If your top 5 trading partners are on the same EDI network, the integration can be very tight — custom fields, bespoke workflows, industry-specific extensions.
Proprietary platforms support EDIFACT, X12, TRADACOMS, and custom formats. If you have legacy EDI workflows, they’ll accommodate any schema.
Drawbacks
Your data, connections, and trading partner relationships are owned by the platform. Switching means re-onboarding every partner from scratch.
Most proprietary networks charge per document sent or received. At scale, costs can be 5-10x higher than Peppol Access Point fees.
Every new trading partner requires a separate onboarding process — mapping, testing, and agreement. Adding partner #100 is as expensive as adding partner #1.
No government is mandating proprietary EDI for compliance. ViDA, ZATCA, and FTA are all converging on Peppol. Proprietary networks are being left behind by regulation.
New partner setup can take weeks or months — involving mapping documents, testing cycles, and commercial negotiations for each connection.
You can only transact with partners on the same network. If your customer uses a different VAN, you need an interconnect agreement — if one even exists.
Head-to-Head Comparison
Here's the direct comparison across the dimensions that matter most to decision-makers. The table below tells the full story.
| Dimension | Peppol | Proprietary EDI |
|---|---|---|
| Network Type | Open, federated mesh | Closed, hub-and-spoke |
| Governance | Non-profit (OpenPeppol) | Private vendor |
| Vendor Lock-in | None — switch AP freely | High — data & connections tied to vendor |
| Pricing Model | Flat-rate AP fee | Per-transaction + setup fees |
| Partner Onboarding | Automatic via SMP directory | Manual bilateral setup per partner |
| Format Standard | UBL 2.1 / CII (one format for all) | EDIFACT, X12, custom schemas |
| Government Mandate | ViDA, ZATCA, FTA — yes | None — not mandated anywhere |
| Geographic Reach | 40+ countries, expanding | Limited to vendor’s network |
| Growth Rate | 40%+ YoY | Flat to declining |
| SME Suitability | Excellent — low barrier | Poor — high setup cost |
| Future-proofing | Strong — regulatory direction | Weak — being superseded |
Cost Analysis: 3-Year TCO
For a mid-market company sending 5,000 invoices per month across 20 trading partners, the total cost of ownership tells a stark story:
Peppol (via InvoStaq)
Proprietary EDI
~9x Cost Difference
Peppol's flat-rate model means your cost doesn't scale with volume — send 100 or 100,000 invoices for the same price. Proprietary EDI charges per transaction, so costs grow linearly with your business. Over 3 years, that's roughly €56,800 in savings by choosing Peppol.
Our Recommendation
For government mandates (ViDA, ZATCA, FTA), Peppol is unequivocally the direction. The question isn't whether to adopt Peppol — it's when and how. Here's our decision framework based on where you are today:
Already on Proprietary EDI?
Maintain existing connections for current partners where the integration is deep and working. But add Peppol as your primary channel for new partners and government compliance. Run both in parallel during the transition, then sunset proprietary connections as Peppol coverage grows.
Starting Fresh?
Go Peppol-first. There is no strategic reason to choose a proprietary network in 2026. You get government compliance out of the box, automatic partner discovery, flat-rate pricing, and a network that's growing at 40%+ YoY. Future-proof from day one.
The Regulatory Direction Is Clear
ViDA mandates Peppol for EU cross-border B2B invoicing from 2028. ZATCA and FTA are already integrated. Belgium, France, Germany, and Spain are all building on Peppol infrastructure. No government anywhere is mandating proprietary EDI. The direction is unambiguous — and the cost of delay is compounding.
The businesses that move to Peppol early don't just save money — they gain a structural advantage. Automatic partner discovery, government compliance baked in, and zero switching costs mean you can focus on growing your business instead of managing EDI connections. The question is no longer "Peppol or proprietary?" — it's "how fast can we get on Peppol?"
Choose Peppol With Confidence
InvoStaq is a certified Peppol Access Point. No vendor lock-in. Flat-rate pricing. Government compliance across 40+ countries. Get connected in days, not months.