Kase
Fontana, CAFounded 2015kase.com ↗+1 800-728-9984
General fulfillment operation with a verified FBA prep service. Never ranked and never counted in our prep-specialist stats.
Kase is the ecommerce fulfillment brand of WSI (Warehouse Specialists, LLC), a logistics group based in Appleton, Wisconsin. It started as ShippingTree, a Southern California 3PL that WSI bought in February 2024 and renamed Kase in March 2025. The listed network is five buildings: Fontana, CA (the published main address), Sunnyvale, TX in the Dallas market, Sauk Village, IL near Chicago, Whitehall, OH beside the Columbus airport, and Northampton, PA. FBA prep is one line inside a DTC, retail and B2B fulfillment business. The prep page describes inspecting and counting each inbound unit, applying Amazon barcode labels, polybagging or bubble wrapping items that need protection, building bundles and kits as single sellable units, and tracking stock from receipt through prep to the outbound shipment to Amazon. Kase also offers its clients Amazon Shipping parcel rates through a partnership. Pricing is quote-based; no prep rates are published. Cautions: the dedicated FBA prep page was published in January 2026, after Amazon ended its own US prep service. ShippingTree's 2021 homepage listed 'FBA Prep Services' as a one-line item, but we found no earlier description of the work, so treat prep as a recently built-out line inside an established 3PL. Onboarding, account management and case studies are aimed at mid-size brands, not small resellers. The site's 13 million sq ft figure covers the wider WSI network; the five Kase buildings it lists total about 1.1 million sq ft. The 25.8-hour dock-to-stock figure is the operator's own.
- 2015 (11 yrs)
Services offered
- FNSKU labeling
- Inspection
- Bundling
- Shopify fulfillment
- Prep
- Polybagging
- Bubble wrap
- B2B fulfillment
- Long-term storage
- Returns processing
- Kitting
- Multi-channel fulfillment
- DTC fulfillment
Quote-based; no published rates as of 2026-09-29 (https://kase.com/pricing/ says pricing is built per brand; https://kase.com/fba-prep-services/ lists no prep rates).
Collecting rates like these from a dozen centers is a week of quote emails. Tell us your monthly volume, categories, and region and an editor replies with up to 5 verified centers that fit, each with its per-unit pricing and last-verified date. We pick on fit, so a center other than Kase can come back. About 2 minutes, no account.
Get matched to verified centers →This listing cleared our 4-point operator standard before being published. We run automated liveness checks on published listings, re-verify on user reports, and update when the operator edits details directly via the claim flow.
Centers can pay us per click we send to their site, or for a clearly-labeled Featured placement. They can never pay for ranking, for placement here, or for this verification.
What sellers say about Kase.
Write a review →No reviews yet. If you have worked with this prep center, your first-hand experience is the most useful thing a future seller can read here.
Common questions about Kase.
Where is Kase located?
What services does Kase offer?
What does Kase charge?
Is Kase currently accepting new clients?
Does Kase handle hazmat?
How long has Kase been operating?
Comparable options.
Next things to read.
- Amazon fulfillment center locations. Where your inventory lands after this center ships it inbound.
- FBA prep fees. Per-unit rates across the directory, dated and sourced.
- How to choose an FBA prep center. The 5-question buyer checklist to run before committing volume.
- How we verify. The 4-point standard behind the verification date on this profile.
- Best FBA prep centers 2026. The full verified ranking with side-by-side rate cards.
- FBA prep centers in California. Other verified centers in the same state, with rate cards.
- Best FBA prep centers for returns processing. The data-driven roster for this service.