For Shopify store owners who carry products from different vendors, controlling combined shipping is an important challenge. By preventing products from different manufacturers or brands from being ordered together, you can streamline inventory management and shipping. This article explains in detail how to use the Shopify app "RuffRuff Order Limits" to control combined shipping for products from different vendors.
The blog article below introduces recommended Shopify apps for controlling combined shipping on Shopify. Please use it as a reference.
What Is a Vendor on Shopify?

On Shopify, "vendor" refers to the "Vendor" field that can be set in product management.
Some Shopify store owners set the vendor field to a manufacturer or brand name. By using the method introduced in this article, you can control combined shipping not only by vendor, but also to prevent products from different manufacturers or different brands from being ordered together.
The blog article below introduces use cases for the Shopify vendor field. Please use it as a reference.
How to Control Combined Shipping for Products from Different Vendors
Outcome
If your Shopify store carries many products from different vendors, applying the settings in this article will enforce the following combined shipping restrictions on your store:
- Products from the same vendor can be purchased together
- Products from different vendors cannot be purchased together
Preparation
This article's setup uses the Shopify app "RuffRuff Order Limits."
If you haven't installed RuffRuff Order Limits yet, please install it via the link below.
RuffRuff Order Limits is a Shopify app that lets you implement every kind of purchase restriction—quantity limits, amount limits, combined shipping restrictions, customer restrictions, payment restrictions, and more—with a single app. It was the first in Japan to adopt the Cart and Checkout Validation API, achieving a more robust validation system than existing combined shipping restriction apps.
Setup Steps
Step 1. Enable the Embedded App
If you're already using RuffRuff Order Limits and have enabled the embedded app, you can skip this step.

(1) Go to "Online Store > Themes"
(2) Click "Customize" on the Shopify theme where you want to add the app

(3) Click the "App embeds" icon on the left of the theme editor
(4) Enable the app named "RuffRuff Order Limits"
(5) Click "Save"
Step 2. Create a Collection That Extracts All Products

(1) From the Shopify admin, go to "Products > Collections"
(2) Click "Create collection"

(3) On the collection creation page, set the collection name and the condition to extract all products
* In the attached image, the condition is set to extract products with a price greater than 0.
(4) Click "Save"

(5) In the sales channels, confirm that "Online Store" has a published status
* If "Online Store" does not have a published status, the app will not work correctly, so please be careful.
Step 3. Create a Combined Shipping Rule in the App

(1) From the left menu of RuffRuff Order Limits, click "Combined Shipping Rules"
(2) Click "Create Rule"

(3) On the combined shipping rule creation page, configure the following settings
- Rule name: Enter any name
- Combinable scope: Select "Products with the same vendor can be combined"
- Target products: Select the collection created in Step 2
- (Optional) Product message: Enter any text
- (Optional) Alert message: Enter any text
(4) Click "Save"
Conclusion
To control combined shipping for products from different vendors on Shopify, using the "RuffRuff Order Limits" app is an effective approach. With this app, you can prevent products with different vendors, manufacturers, or brands from being ordered together. This can be expected to streamline store operations and improve customer satisfaction. By thoroughly understanding the setup steps and configuring them correctly, you can achieve smoother store operations.
Finally, the blog article below summarizes how to implement purchase restrictions on Shopify. Please use it as a reference.


