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Head-to-head · Inventory Optimization Software

Slimstock Slim4 vs ToolsGroup SO99+

  • Updated Oct 2026
  • Both researched from official sources
  • 6 checks side by side
Higher score Slimstock Slim4 #2 in Inventory Optimization Software 8.7/10 Pricing on request ✓ 1 of 6 features Visit Slimstock
ToolsGroup SO99+ #3 in Inventory Optimization Software 8.6/10 Pricing on request ✓ 6 of 6 features Visit ToolsGroup

Slimstock Slim4 leads on 0 checks, ToolsGroup SO99+ on 0, and 6 are even. Who comes out ahead on the 6 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreSlimstock Slim4 · 8.7/10
  • Most featuresToolsGroup SO99+ · 6 of 6

Slimstock Slim4 scores higher on our rubric for inventory optimization software: 8.7 against 8.6 out of 10; our editors rank them #2 and #3.

Slimstock Slim4 is the better fit for businesses needing ERP-connected replenishment. ToolsGroup SO99+ is the better fit for businesses with intermittent demand.

  • Slimstock Slim4 fits best

    Businesses needing ERP-connected replenishment

  • ToolsGroup SO99+ fits best

    Businesses with intermittent demand

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Side by side

Feature Slimstock Slim4 8.7/10 Visit ↗ ToolsGroup SO99+ 8.6/10 Visit ↗
At a glance
Editor score 8.7 8.6
Ranking #2 in Inventory Optimization Software #3 in Inventory Optimization Software
Best for Businesses needing ERP-connected replenishment Businesses with intermittent demand
Pricing model Paid Paid
Starting price Pricing on request Pricing on request
Free plan Not checked yet Not checked yet
Free trial — —
Deployment Cloud, Self-hosted Cloud
Platforms Web Web
Compliance ISO 27001 SOC 2, ISO 27001, GDPR, SSO/SAML, 2FA
Integrations 4 integrations 7 integrations
Built for Small business, Mid-market, Enterprise Mid-market, Enterprise
Features Slimstock Slim4 1/6 · ToolsGroup SO99+ 6/6
Multi-location optimization ✓ ✓
Safety stock optimization Not checked yet ✓ (best)
Service-level targets Not checked yet ✓ (best)
Replenishment recs Not checked yet ✓ (best)
Multi-echelon optimization Not checked yet ✓ (best)
Scenario planning Not checked yet ✓ (best)
Our review
Pros
  • Dynamic safety stock and statistical demand forecasting
  • Multi-location, multi-echelon planning with stock-transfer recommendations
  • Integrations with SAP, Oracle, Microsoft Dynamics, and NetSuite
  • Probabilistic forecasting addresses intermittent and long-tail demand
  • Optimizes targets, safety stock, reorder levels, and service levels
  • Supports multi-echelon planning, replenishment, and what-if scenarios
Cons
  • Quote-based pricing requires a sales conversation
  • Web platform with cloud or on-premise deployment options
  • Broad supply-chain scope may exceed simpler inventory needs
  • Pricing requires contacting sales
  • The SO99+ name is no longer presented as a standalone current product
  • Its broad planning scope may exceed simpler inventory needs
Our verdict

Slimstock Slim4 is an inventory optimization and supply chain planning platform for retailers, wholesalers, manufacturers, and other organizations managing complex product networks. It covers demand forecasting, automated replenishment,…

Read the review →

ToolsGroup SO99+ was a service-driven supply chain planning and inventory optimization platform for manufacturers, distributors, retailers, and aftermarket organizations. It focused on businesses managing uncertain, intermittent, or…

Read the review →
  1. Slimstock Slim4Inventory Optimization Software 8.7Pricing on request
  2. ToolsGroup SO99+Inventory Optimization Software 8.6Pricing on request

Strengths and trade-offs

  • Slimstock Slim4 — where it wins

    • Dynamic safety stock and statistical demand forecasting
    • Multi-location, multi-echelon planning with stock-transfer recommendations
    • Integrations with SAP, Oracle, Microsoft Dynamics, and NetSuite

    Where it doesn't

    • Quote-based pricing requires a sales conversation
    • Web platform with cloud or on-premise deployment options
    • Broad supply-chain scope may exceed simpler inventory needs

  • ToolsGroup SO99+ — where it wins

    • Probabilistic forecasting addresses intermittent and long-tail demand
    • Optimizes targets, safety stock, reorder levels, and service levels
    • Supports multi-echelon planning, replenishment, and what-if scenarios

    Where it doesn't

    • Pricing requires contacting sales
    • The SO99+ name is no longer presented as a standalone current product
    • Its broad planning scope may exceed simpler inventory needs
  • Slimstock Slim48.7/10 · Pricing on request

    ERP-connected forecasting and replenishment for complex, multi-location inventory networks.

    Visit SlimstockFull verdict →
  • ToolsGroup SO99+8.6/10 · Pricing on request

    A broad, enterprise-focused optimizer for uncertain demand and multi-location inventory.

    Visit ToolsGroupFull verdict →

More comparisons

All inventory optimization software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update