Who We Are

Sixth Stack Fulfillment is a major full-service fulfillment and warehousing company providing best in class 3rd party services. Established in 2020 and strategically located in WA and CA, our warehouse facilities total over 40,000 sq. feet. We specialize in full-service, multi-channel custom e-commerce fulfillment, product distribution, and value-add services including kitting, subscription box fulfillment, bundling, light assembly, and custom packing solutions. Our flexible systems simplify integration with client websites and are maintained in-house to ensure quick response to update requests and troubleshooting. We provide client tailored reporting and real-time visibility to daily operations via our web-based portal. We have a strong company culture based on core values of honesty, integrity, and reliability. We understand the importance of partnership, the value of quality, and the commitment needed to secure success. A fulfillment company is an extension of you and your brand. Our core focus statement says it all – strengthening our customer’s brand through industry leading fulfillment services.