Comparison

ShipExtension vs Shipping+

Full disclosure: we build ShipExtension, so we're not a neutral review site. Shipping+ is a focused rate-shopping tool, and it's genuinely good at that. ShipExtension rate-shops too, but it starts by deciding which box a multi-item order needs and adds retailer packing slips, weather-based rules, and a per-order audit trail. Here's the honest side-by-side, as of July 2026.

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ShipExtension vs Shipping+, side by side

Feature ShipExtension Shipping+

Starting monthly price

 Self-serve subscription from $79/mo — as of July 2026. Beta pricing tiers from about $25 to $1,000/mo, scaled by monthly action volume — as of July 2026.

Free trial

 Free 14-day trial, no credit card required. 14-day trial (as of July 2026).

Rate shopping

 Package-first, cross-account rate shopping: decides the box first, then selects the lowest-cost eligible service across every carrier account you own and writes it back in bulk. Rate shopping between carriers and services, with package-type conditions — its core focus (as of July 2026).

Multi-item 3D cartonization

 Yes — true 3D bin-packing across a mixed cart, with a whole-order consolidation guard, to decide which box (or boxes) an order physically fits. No multi-item 3D cartonization (as of July 2026).

Multi-SKU rule conditions

 Yes — conditions that combine multiple SKUs (contains-all, only-contains, and item counts) that native ShipStation SKU rules skip on multi-item orders. Focused on rate shopping and package-type conditions, not multi-item cartonization (as of July 2026).

Retailer packing-slip templates

 Built-in Home Depot, Macy's, and Lowe's slip templates, with label-interleaved batch PDFs. No retailer packing-slip templates (as of July 2026).

Weather / outside-data rules

 Yes — weather-condition rules, such as heat-pack insertion based on the forecast at the destination. No weather logic (as of July 2026).

Dry-run and audit trail

 Forced-safe dry-run, read-back verification, and a per-order audit trail of every change before anything is written to ShipStation. Rate shopping is the focus; box selection, slips, weather rules, and a full audit trail aren't part of the documented product (as of July 2026).

Choose Shipping+ if…

  • Rate shopping is genuinely your only gap, and you don't need box selection, packing slips, or weather logic.
  • Your package types are already sorted and you just want the lowest-cost service compared automatically.
  • You want a focused, lower-entry-price tool and are comfortable with beta pricing that scales by monthly action volume — as of July 2026.

Choose ShipExtension if…

  • You need the box decided first — which carton (or cartons) a multi-item order physically fits — before any rate is compared.
  • You need retailer packing-slip templates (Home Depot, Macy's, Lowe's), weather-based rules, or a per-order audit trail alongside rate shopping.
  • You want one self-serve tool that covers box decisioning, slips, weather, and rate shopping together, from $79/mo — as of July 2026.

Shipping+ is a solid, focused choice if rate shopping is the one thing you're missing. ShipExtension is the superset: it rate-shops too, but it starts by deciding the right box and layers on retailer slips, weather logic, and an audit trail — at comparable self-serve pricing.

FAQ

Frequently asked questions

What's the difference between ShipExtension and Shipping+?
Shipping+ (shippingplus.co, from Shipping Plus LLC) is a self-serve rate-shopping tool that compares carriers and services and applies package-type conditions, with beta pricing from about $25 to $1,000 per month by action volume and a 14-day trial, as of July 2026. ShipExtension does rate shopping too, but it decides which box a multi-item order physically fits first, then adds retailer packing-slip templates, weather-based rules, and a per-order audit trail. If rate shopping is your only gap, Shipping+ is a focused option; if you need box decisioning and documents as well, ShipExtension is the superset.
Does Shipping+ do multi-item box selection?
No — Shipping+ is focused on rate shopping between carriers and services, and doesn't do multi-item 3D cartonization, as of July 2026. ShipExtension runs true 3D bin-packing across a mixed cart with a whole-order consolidation guard, so it can decide which box (or boxes) an order needs before comparing rates. That box-first step is the main capability difference between the two.
Does Shipping+ work with ShipStation, and does ShipExtension?
ShipExtension is built specifically to extend ShipStation — it reads your live orders, decides the package, rate-shops across your carrier accounts, and writes changes back with an audit trail, without moving you off ShipStation. Shipping+ is a rate-shopping tool that also engages with the ShipStation community; for their current ShipStation support details, check Shipping+ directly, as of July 2026.
Is Shipping+ or ShipExtension cheaper?
Shipping+ can start lower — its beta tiers begin around $25 per month and scale with your monthly action volume, as of July 2026. ShipExtension starts at $79 per month. The comparison depends on what you need: Shipping+ prices for rate shopping alone, while ShipExtension's price covers box selection, retailer slips, weather rules, and rate shopping together. Price both against the specific gaps you're trying to close.

Last reviewed July 17, 2026. Shipping+ pricing and capabilities cited from shippingplus.co; ShipStation capabilities and pricing cited from ShipStation's help center and pricing page — all as of July 2026.

Rate shopping is the start, not the whole job

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