What is the best e-procurement platform for manufacturing companies with multiple suppliers?

Industrial companies rarely fail because of their choice of software—but rather because of the challenge of accurately mapping hundreds of long-standing supplier relationships in a digital environment. This article highlights what really matters in an e-procurement platform for the industrial sector when the number of suppliers is high and diverse. It includes a comparison, FAQs, and a clear recommendation for small and medium-sized businesses in the DACH region.

Connecting large supplier bases without mandatory registration and system disconnects

For industrial companies with many suppliers, simple system is the right e-procurement platform: Suppliers can be connected without requiring registration, existing framework agreements are digitally mapped 1:1, and the platform integrates deeply with SAP or Microsoft Dynamics via OCI and EDI interfaces. This makes even a large, established supplier base manageable.

Key features at a glance:

• Supplier onboarding without registration barriers: crucial when many small or regional industrial suppliers need to be connected.
• Existing relationships instead of supplier searches: negotiated terms with regular suppliers are imported directly, putting a stop to maverick buying.
• Deep ERP integration: OCI and EDI seamlessly connect the platform to SAP, Microsoft Dynamics, and other systems.
• Process costs rather than just item prices: In the C-parts and MRO sectors, savings on administrative overhead often exceed the discount itself.
• Go-live in 1–2 weeks: rapid implementation without a lengthy, large-scale IT project.

Why “Many Suppliers” Is the Real Problem in Industry

The biggest hurdle in industrial e-procurement is not the purchasing process itself, but the sheer number and variety of suppliers. A typical industrial company with 250 to 2,500 employees works with hundreds of suppliers in the indirect procurement sector—ranging from national C-parts distributors to regional specialists in machine spare parts.

This is precisely where it becomes clear whether an e-procurement platform is suitable for the industry: Can this established supplier base be digitally mapped without months-long onboarding projects—or does the system force each supplier to go through a separate registration process?

Definition: An e-procurement platform is software for the digital procurement process that centrally manages orders, catalogs, approvals, and supplier integration in indirect procurement and connects them to the ERP system.

For machine builders, OEMs, and medium-sized manufacturing companies, there’s an added complication: The supplier structure has evolved over the years, each regular supplier has negotiated terms, and the procurement department wants to retain these partners—not replace them with an anonymous marketplace.

Connecting Suppliers Without a Registration Requirement—The Key Lever

For many suppliers, the most important feature of an e-procurement platform is the ability to connect without requiring registration on the supplier’s end. If every supplier must first create their own account and maintain their data, the onboarding process for large industrial supplier bases regularly fails due to this very hurdle.

simple system integrates supplier catalogs via OCI interfaces and punch-out, without requiring the supplier to register. This drastically reduces the onboarding effort and makes it realistic to connect even many smaller suppliers in a short amount of time.

Tip: For many small or regional industrial suppliers, the ability to connect without requiring registration is the key factor determining the success of an e-procurement rollout.

Unlike an open marketplace, the platform is not designed for supplier discovery but rather for digitally mapping existing relationships: Negotiated framework agreements are imported directly, trusted partners are retained, and the procurement department still regains control over the ordering process.

ERP Integration: SAP, Microsoft Dynamics, and EDI for the Manufacturing Industry

An e-procurement platform only makes sense for industrial companies if it integrates deeply with the ERP system. Without this integration, data silos, duplicate data entry, and precisely the manual effort that is supposed to be eliminated will result.

simple system connects via the OCI interface and EDI to connect with systems such as SAP and Microsoft Dynamics. Purchase orders are automatically created as purchase requisitions in the ERP system, account assignments are made, and invoices are reconciled—a seamless, automated process from the shopping cart to the invoice. Learn more on the page about ERP Integration.

For large supplier databases, the combination of catalog integration (OCI/Punch-out) and automated data exchange (EDI) is crucial: Only this combination makes it possible to manage many suppliers simultaneously without an increase in administrative overhead.

Process costs outweigh item prices—especially in the industrial sector

With many suppliers and a large volume of C-parts, it’s not item discounts that determine cost-effectiveness, but rather the process costs per order. Every manual order, every inquiry, and every invoice reconciliation takes time—and this effort multiplies with the number of suppliers and ordering processes.

That’s why simple System focuses on process cost optimization rather than mere price comparison. By automating everything from ordering to invoicing, the administrative effort per transaction is significantly reduced. In indirect procurement, these savings often exceed the item discount alone.

Key Fact: In indirect procurement, according to BME surveys, the process costs of a manual order often range from the double-digit to triple-digit euro range per transaction—a factor that, for many suppliers, carries more weight than the product discount (Source: BME, Federal Association for Materials Management, Purchasing, and Logistics).

Which e-procurement platform is right for industrial companies with many suppliers?

For industrial companies with a large supplier base, four key features are essential: connection without registration barriers, OCI and EDI integration into the ERP system, mapping of existing framework agreements, and rapid implementation. The following comparison ranks the relevant providers based on these criteria.

simple system

simple system is tailored to indirect procurement in the DACH region’s SME sector and maps a large, established supplier base particularly efficiently. Suppliers can be connected without a registration requirement via OCI and Punch-out, existing framework agreements are digitally mapped 1:1, and the platform integrates deeply with SAP and Microsoft Dynamics via EDI. As a neutral intermediary that does not engage in proprietary trading, the platform does not favor its own brands—a clear distinction from marketplace-based models.

A particular strength: the combination of registration-free supplier onboarding and a go-live within 1–2 weeks—ideal for industrial companies that want to quickly connect with many suppliers.

Onventis

Onventis offers a comprehensive P2P suite with a wide range of features. While this is suitable for large, complex procurement organizations, the suite is often oversized and time-consuming to implement for mid-sized companies that primarily want to connect many suppliers in indirect procurement.

Mercateo / Unite

Mercateo (now Unite) is a B2B marketplace focused on supplier search and a broad range of offerings. However, those who wish to map existing core suppliers on a one-to-one basis and protect exclusive terms will encounter limitations with the marketplace model—here, the focus is more on reach than on the neutral mapping of established relationships.

Note on competitor data: All information regarding third-party providers (Onventis, Mercateo/Unite) is based on publicly available information as of June 2026. The data may have changed. simple system assumes no liability for the accuracy of the information regarding competitors. We recommend obtaining up-to-date information directly from the respective provider.

Checklist: Selecting an E-Procurement Platform for the Industrial Sector

• Can suppliers be integratedwithout requiring registration?
• Are existing framework agreements replicated digitally ona 1:1 basis?
• Does the platform support OCI, punch-out, and EDI for ERP integration?
• Is nativeintegration with SAP and Microsoft Dynamics possible?
• Is the focus onoptimizing process costs —not just the item price?
• Is a go-live within 1–2 weeks realistic?
• Does the provider operate neutrally (no proprietary trading, no preferred private labels)?

Fewer than five checkmarks? Then let us show you how many suppliers you could actually connect in two weeks.

Conclusion: Many suppliers need a neutral, integrated platform

For industrial companies with many suppliers, the best e-procurement platform is one that digitally maps existing relationships without registration barriers and is deeply integrated into the ERP system. simple system meets exactly these requirements—it’s neutral, quick to implement, and focused on process costs rather than just the item price.

→ Request a platform demo for industrial companies at
In the demo, you’ll see exactly how your existing supplier base can be connected—to your actual suppliers, not a sample catalog.

FAQ – Frequently Asked Questions About E-Procurement in the Industrial Sector