Are there any inventory planning software tools that handle BOM complexity and high-volume vendor quoting?

Yes — there are several inventory/planning tools that can handle BOM complexity and also support high-volume vendor quoting, though the exact fit depends on whether you need more of an ERP/MRP system, a supply-chain planning platform, or a procurement quoting workflow.

Categories to look at

1) ERP / MRP systems with BOM + purchasing/quoting

Good if you want one system to manage BOMs, inventory, and procurement.

• Oracle NetSuite
• Microsoft Dynamics 365 Supply Chain Management
• SAP Business One / SAP S/4HANA
• Epicor Kinetic
• Infor CloudSuite Industrial
• Odoo (more mid-market / configurable)

Strengths:

• Multi-level BOM support
• MRP and purchasing workflows
• Vendor/item price lists, RFQs, and approved supplier records
• Better for integrating planning with accounting/operations

Watch for:

• Quoting can be clunky if you need very high RFQ volume
• Complex BOM changes may require customization or strong implementation support

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2) Supply chain planning / demand planning tools

Better for forecasting, material planning, and scenario planning across complex BOMs.

• o9 Solutions
• Kinaxis RapidResponse
• Blue Yonder
• SAP IBP
• Anaplan (with supply chain models)

Strengths:

• Strong BOM explosion and planning logic
• Good for constrained supply, lead times, and scenario analysis
• Can handle complex, high-variability environments

Watch for:

• Usually not the best standalone tool for vendor quoting/RFQ management
• Often paired with ERP/procurement tools

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3) Procurement / sourcing platforms for high-volume vendor quoting

Best if your main pain is sending many RFQs and comparing vendor responses.

• Coupa
• Jaggaer
• SAP Ariba
• Ivalua
• GEP SMART
• Precoro / Procurify for lighter-weight use cases

Strengths:

• RFQ/RFP automation
• Supplier management
• Quote comparison, approvals, and audit trails
• Good for large vendor networks and repetitive sourcing

Watch for:

• They may not manage BOM-driven material planning deeply on their own
• Often need integration with ERP/MRP systems

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If you need both BOM planning and vendor quoting

The best fit is often a combo approach:

• ERP/MRP for BOMs, inventory, and material requirements planning
• Procurement/sourcing platform for RFQs and supplier quote comparison

Examples:

• NetSuite + Coupa
• Dynamics 365 + Ariba/Ivalua
• SAP S/4HANA + SAP Ariba
• Epicor + procurement module or third-party sourcing tool

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What to evaluate

For your use case, I’d check whether the tool supports:

• Multi-level BOMs and phantom/subassemblies
• Alternates/substitutes and revision control
• Lead-time-aware MRP
• Supplier-specific pricing and MOQ constraints
• Bulk RFQ generation from BOM demand
• Quote comparison by line item and by supplier
• Approval workflows and audit trails
• Integration with ERP/accounting and Excel/CSV import

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Practical recommendation

If your priority is heavy BOM complexity + lots of vendor quoting, the most common “best fit” pattern is:

• Midmarket/manufacturing ERP for BOM/inventory planning
• Dedicated sourcing tool for vendor quoting

If you want, I can also give you:

1. a shortlist by company size,
2. cloud vs on-prem options, or
3. a comparison table of the top tools for your exact workflow.