MergeGuard vs Doppelganger for merging duplicate customers
Doppelganger and MergeGuard for Shopify both help you find and merge duplicate customer accounts. Doppelganger’s listing has a free plan for stores with few orders and a paid plan at $5 a month. MergeGuard prices by merges, shows why each group matches, and adds audiences that count people. Doppelganger’s details come from its listing on October 26, 2026.
Last updated
Listings checked
This page is written by MergeGuard.
Both apps were checked on their Shopify App Store listings on October 26, 2026. Prices are in USD and either company can change them. Read both listings before you choose: Doppelganger and MergeGuard.
Everything about Doppelganger on this page is what Doppelganger says on its listing. We haven’t tested Doppelganger ourselves.
Which one fits your store
Choose Doppelganger if
- You want a paid plan at $5 a month.
- You run a small store and want its Free Plan, which is free for stores with less than 50 orders a month, with unlimited linking of customer accounts, email and live chat support.
- You want a more accurate customer lifetime value, and linking accounts from the same company.
- You want email and live chat support on every plan.
Choose MergeGuard for Shopify if
- You want to see why each group matched, field by field, before a permanent merge.
- You want automatic merging for strong matches, and to decide yourself whether groups that need your judgment merge too.
- You want newsletter, win-back, VIP and subscription lists (subscribers who may cancel) that count each person once.
- You want a History record of every change, with Shopify’s verification and a snapshot of each merged customer.
- You want suggested fixes for mistyped emails, each one undoable once.
Side by side
Finding and reviewing
| Doppelganger (from its listing) | MergeGuard for Shopify | |
|---|---|---|
| Finding duplicates | The feature list says find, link and merge duplicate accounts | Finds duplicate groups across the store and sorts them into Strong, Needs your judgment and New, with protected groups shown separately |
| What it matches on | Not listed | Name, email, phone and address, shown as evidence for each group |
| How a match is explained | Not listed | “Why we think it’s one person”: the matching name, email, phone and address details for each group, with a recommended profile to keep |
Merge controls and records
| Doppelganger (from its listing) | MergeGuard for Shopify | |
|---|---|---|
| Merging | Merges duplicate accounts | A whole group in one confirmation, or every strong match in one pass |
| Automatic merging | Not listed | 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 |
| Record of changes | Not listed | History: every change, the details kept, Shopify’s verification, and a snapshot of each merged customer |
Beyond merging
| Doppelganger (from its listing) | MergeGuard for Shopify | |
|---|---|---|
| Customer value | The headline says “Merge duplicate accounts and get a better view of the actual Customer Lifetime Value” | VIP lists count a person’s spend across all their profiles |
| Contact data fixes | Not listed | Suggested corrections for mistyped emails, such as gmial.com → gmail.com. Throwaway emails are flagged and never changed. Each fix can be undone once |
| Marketing audiences | Not listed | Newsletter cleanup, win-back, VIP and Subscription (subscribers who may cancel) lists that count each person once |
| Integrations | no integrations listed | Klaviyo list sync when you choose it, or CSV export |
Plans and listing
| Doppelganger (from its listing) | MergeGuard for Shopify | |
|---|---|---|
| Free plan | Free Plan: free for stores with less than 50 orders a month, with unlimited linking of customer accounts, email and live chat support | 25 merges and 5 contact fixes, once |
| Paid plans | Basic Plan at $5 a month: unlimited linking of customer accounts, email and live chat support and a 7-day free trial | Starter $29 a month (150 merges). Growth $49 (300). Scale $99 (500). Enterprise: contact us |
| Built for Shopify | No | No |
| App Store reviews | Rated 3.6 from 7 reviews | None yet |
| Developer | Marquee Development, launched October 14, 2021 | Caelena Software Labs, launched January 13, 2026 |
“Not listed” means we didn’t find it on Doppelganger’s listing. It may exist in the app. Reviews and ratings show what a few merchants wrote. They don’t measure how either app will work on your store.
What stays the same with any app
Shopify refuses some merges, for example when a profile has, or has ever had, a subscription contract. Doppelganger’s listing doesn’t say how it treats those profiles. See why Shopify blocks a merge. Shopify’s own merge can’t be reversed, and MergeGuard’s merges are permanent too, so check what any app does before you rely on its undo, if it lists one.
How to decide
Try both on your own store. Look at a group you know well and check whether each app explains the match in a way you trust. Before your first merge, run the safe merge checklist.
With MergeGuard, 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 compare it with Shopify’s built-in merge, Singulary or UnifyMate. All the comparisons are on one page: compare duplicate customer apps.
Sources
Each claim on this page, where it comes from, and when we checked it.
| Claim | Source | Checked |
|---|---|---|
| Doppelganger lists these features: find, link and merge duplicate accounts. | Doppelganger on the Shopify App Store (apps.shopify.com) | |
| Doppelganger’s headline is “Merge duplicate accounts and get a better view of the actual Customer Lifetime Value”, and the listing describes a more accurate customer lifetime value, and linking accounts from the same company. | Doppelganger on the Shopify App Store (apps.shopify.com) | |
| Doppelganger’s Free Plan is free for stores with less than 50 orders a month, with unlimited linking of customer accounts, email and live chat support. | Doppelganger on the Shopify App Store (apps.shopify.com) | |
| Doppelganger’s paid plan: Basic Plan at $5 a month: unlimited linking of customer accounts, email and live chat support and a 7-day free trial. | Doppelganger on the Shopify App Store (apps.shopify.com) | |
| Doppelganger is made by Marquee Development, launched on October 14, 2021, shows a rating of 3.6 from 7 reviews, and isn’t Built for Shopify. | Doppelganger on the Shopify App Store (apps.shopify.com) | |
| MergeGuard’s listing has 0 reviews and isn’t Built for Shopify. | MergeGuard on the Shopify App Store (apps.shopify.com) | |
| MergeGuard plans, allowances and which plans include automatic merging. | 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.