Are there any procurement platforms that handle multi-vendor purchasing and route PO approvals by department?

Yes. Many procurement platforms support both:

1. Multi-vendor purchasing — letting users buy from approved suppliers or marketplaces, often in a single workflow.
2. PO approval routing by department — automatically sending purchase orders or requisitions to the right approvers based on department, cost center, spend threshold, or category.

Examples of platforms that commonly support this include:

• SAP Ariba – strong enterprise procurement, supplier management, and configurable approval workflows.
• Coupa – robust spend management with multi-vendor sourcing and rule-based approval routing.
• Oracle Procurement Cloud – handles supplier catalogs and department-based approval chains.
• Jaggaer – often used in higher ed and enterprise procurement with approvals and supplier management.
• Procurify – simpler mid-market option with departmental approval workflows and vendor purchasing.
• BILL Spend & Expense / Bill.com – includes purchasing and approval controls, more finance-oriented.
• Microsoft Dynamics 365 / NetSuite with procurement modules – if you want ERP-integrated purchasing and approvals.
• GEP SMART – enterprise procurement with sourcing, supplier, and approval workflow features.

What to look for

When comparing platforms, check whether they support:

• Multiple vendors/suppliers in one purchasing workflow
• Department-based approval rules
• Spend limits and matrix approvals
• Budget vs. actual checks
• PO creation from requisitions
• Catalog and non-catalog purchases
• ERP/accounting integrations
• Role-based access by department or location

If you want a lighter-weight tool

For mid-sized teams, platforms like Procurify, BILL, or Precoro can be easier to deploy than heavy enterprise suites.

If you want, I can also give you:

• a shortlist by company size
• a feature comparison table
• or recommendations based on your accounting/ERP system