You can find eligible CSS partners on Google’s Comparison Shopping Partners portal. Filter by one or more countries, industries, or supported languages to find CSSs that fit your specific needs. You can also set filters to search for partners that offer API feed technology or for premium partners that have additional technical certification and offer conversion tracking for merchants.

If you’d like to keep an existing Merchant Center account, but work with a different CSS, Google can migrate your account from one CSS to another. This is only possible if both CSSs consent to this migration. Ask your new CSS to reach out to Google support for the migration. Note that a Merchant Center account can be associated with only one CSS at a time.

Google Ads accounts do not need to be migrated. Your Merchant Center account determines which CSS your ads and free listings are associated with. If you use product data from a Merchant Center account that is associated with a specific CSS for any campaign in any Google Ads account, that campaign is considered to belong to the associated CSS.

Ads on Display remarketing and surfaces beyond general search

If the CSS you migrate to is not opted in to serving ads on Display remarketing and surfaces beyond general search, your ads will only appear on Google’s general search results pages and will stop serving on other surfaces.

Product data for countries where the CSS program is not available:

If the migrated Merchant Center account contains product data for countries where the CSS program is not available, these ads and free listings will stop serving if the new CSS has not chosen to place ads and free listings in those countries. If you want to continue to place ads and free listings both in countries where the CSS program is available and in countries where it’s not, you have two options:

1. Create a new Merchant Center account with Google Shopping for your product data for countries where the CSS program is not available.
2. Migrate the existing Merchant Center account to the CSS to place ads and free listings in CSS program countries. Ask the new CSS to create a new Merchant Center account for your product data for CSS program countries. Keep the existing Google Shopping Merchant Center account to place ads and free listings in countries where the CSS program is not available.

When migrating your Merchant Center account from one CSS to another CSS, two different setups are possible:

1. The account is migrated as a sub-account of the CSS’s multi-client account. In this case, the CSS automatically gets access to your account. Note that the CSS associated with the multi-client account and the CSS associated with the sub-account need to be identical.
2. The account is migrated as a stand-alone account. In this case, the CSS does not automatically get access to your account. CSS staff need to be added manually as users to the account.