MergeGuard vs Shopify’s built-in customer merge
Shopify’s own merge is included with Shopify and merges two profiles at a time, and you start each one yourself. MergeGuard for Shopify finds duplicate groups and shows why each matches. Nothing merges until you confirm, or until you switch on automatic merging for strong matches or groups that need your judgment. Both follow Shopify’s rules: merges are permanent.
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This page is written by MergeGuard.
Shopify’s help page was checked on October 11, 2026. Every Shopify cell below comes from it.
Which one fits your store
Choose Shopify customer merge (built in) if
- You have a handful of duplicates and already know which profiles they are.
- You merge pairs, never groups of three or more.
- You don’t need marketing lists that count people instead of profiles, or History’s record of the details kept, Shopify’s verification and a snapshot of each merged customer.
- You want to spend nothing beyond your Shopify plan.
Choose MergeGuard for Shopify if
- You don’t know how many duplicates your store has.
- Duplicates keep appearing from guest checkout, typos and new emails.
- You need to merge groups of more than two profiles.
- You want to see why profiles matched before you confirm a permanent merge.
- Your newsletter or win-back lists count the same person more than once.
Side by side
Finding and reviewing
| Shopify’s built-in merge | MergeGuard for Shopify | |
|---|---|---|
| Finds duplicates for you | Not described on Shopify’s help page. You start each merge | Finds duplicate groups across the store and sorts them into Strong, Needs your judgment and New, with protected groups shown separately |
| Why profiles match | You compare the profiles yourself | “Why we think it’s one person”: the matching name, email, phone and address details for each group |
Merge controls and records
| Shopify’s built-in merge | MergeGuard for Shopify | |
|---|---|---|
| Profiles per merge | 2. Repeat for each extra profile | A whole group in one confirmed merge |
| Many groups at once | One pair at a time | Confirm every strong match in one pass |
| Automatic merging | Not described on Shopify’s help page | Optional on Growth, Scale and Enterprise, for strong matches, and for groups that need your judgment only if you add them. Protected profiles are never merged automatically, and it stops before your allowance runs out |
| Which details are kept | You review and choose the merged profile’s details before confirming | Your merge rule sets which details the recommended profile prefers, and every profile is considered when none has them. You choose every detail when you review a group; a bulk merge picks each group’s details |
| Marketing consent | “If the customer is subscribed to email and SMS text marketing in one profile, but not in the other, then the merged profile is subscribed.” | The same rule: if any merged profile is subscribed, the merged customer stays subscribed |
| Profiles Shopify blocks | Can’t be merged | Can’t be merged either. Shown as protected profiles with the Shopify blocker for each profile, and the audiences still count them as one person |
| Undo | Not possible | Not possible, because it’s a Shopify merge. MergeGuard keeps a snapshot of each merged customer as a record |
| Record of changes | The customer’s timeline | History adds the details kept, Shopify’s verification of the merged customer, and a snapshot of each merged customer |
Beyond merging
| Shopify’s built-in merge | MergeGuard for Shopify | |
|---|---|---|
| Email typo fixes | Not part of Shopify’s merge | Suggests corrections such as gmial.com → gmail.com. You can check them first, and each fix can be undone once |
| Marketing audiences | Not part of Shopify’s merge | Newsletter cleanup, win-back, VIP and Subscription (subscribers who may cancel) lists that count people. Sync to Klaviyo or export a CSV |
| Cost | Included with Shopify | Free plan with 25 merges once. Paid plans from $29 a month, billed through Shopify |
When Shopify’s built-in merge is enough
You have a few duplicates you already know about. You merge them in pairs. You don’t need audiences or History’s record of each merge. In that case, Shopify’s own merge does the job and costs nothing extra.
When to keep profiles separate
Some profiles look like duplicates and shouldn’t be merged, whichever tool you use:
- Two people share an email, phone or address, such as people who live together, a gift buyer or a business account.
- It isn’t clear the profiles are one person, and you can’t check.
- Shopify blocks the profile, for example because of a subscription contract, a B2B link or store credit.
- The duplicates don’t affect your marketing or reporting, and the cleanup isn’t worth your time.
Merges are permanent, so leaving a pair alone is the safer choice when you’re unsure. The safe merge checklist covers each check.
Rules both share
Both merge through Shopify, so the same limits apply. A merge can’t be reversed. The customer isn’t notified. Nine situations block a merge, listed on why Shopify blocks a merge. Combined notes can be up to 5,000 characters and tags up to 250.
Try MergeGuard on your store
Nothing merges until you confirm, or until you switch on automatic merging for strong matches or groups that need your judgment. See how it works, or install free from the Shopify App Store. To compare MergeGuard with another duplicate-merging app, read MergeGuard and Singulary compared, MergeGuard and UnifyMate compared or MergeGuard and Doppelganger compared. Every comparison is listed on compare Shopify duplicate customer apps.
Sources
Each claim on this page, where it comes from, and when we checked it.
| Claim | Source | Checked |
|---|---|---|
| Shopify merges two profiles at a time and says to repeat the procedure for each additional profile. | Merge customer profiles (help.shopify.com) | |
| Shopify lets the merchant review and choose the merged profile’s details before confirming. | Merge customer profiles (help.shopify.com) | |
| If one profile is subscribed to email and SMS marketing and the other isn’t, the merged profile is subscribed. | Merge customer profiles (help.shopify.com) | |
| A Shopify merge can’t be reversed, and the customer isn’t notified. | Merge customer profiles (help.shopify.com) | |
| Shopify blocks merges in 9 cases, including subscription contracts, B2B links, vaulted cards and store credit. | Merge customer profiles (help.shopify.com) | |
| Shopify’s help page describes merging as an action the merchant starts and doesn’t describe duplicate detection. | Merge customer profiles (help.shopify.com) | |
| MergeGuard’s listing describes finding duplicates as they appear, showing why profiles match, choosing which details to keep, and merging many at once. | MergeGuard on the Shopify App Store (apps.shopify.com) | |
| MergeGuard plans and allowances. | MergeGuard pricing (mergeguard.store) |
See every duplicate group and its evidence
Install MergeGuard for Shopify and see every duplicate group with its evidence. Nothing merges until you confirm, or until you switch on automatic merging for strong matches or groups that need your judgment. The Free plan includes 25 merges and 5 contact fixes, once.