Doppelganger

Find and merge duplicate customers

by Marquee Development · Launched: October 2021 · Free plan available.

3.2 (6) on Shopify Built for Shopify

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Merge duplicate accounts and get a better view of the actual Customer Lifetime Value.

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About Doppelganger

Every shop has to deal with duplicate accounts. Whether it is from Point Of Sale sales with credit cards or from customers using multiple email addresses to place orders. As a result, your Customer Lifetime Value (CLV) is often way off.With Doppelganger, you can find, link and merge duplicate accounts.Also useful for linking accounts from the same company together to determine the Life Time Value of a client company. Find duplicate accounts Link duplicate accounts Merge duplicate accounts Privacy focused. You stay in control of your customer's data.

Last verified: July 17, 2026 · Fresh

App details

Developer: Marquee Development
Category: Marketing & conversion
Pricing: Free plan available
Launched: October 2021
Rating: 3.2 (6) on Shopify

Key features

Free for stores with less than 50 orders a month
Unlimited linking of customer accounts
Email and Live Chat support

2 plans · starts free · 7-day free trial

Free Plan

Free

Basic Plan

$5/month

Plans and prices as listed on the Shopify App Store.

Ratings & reviews

based on 9 Shopify App Store reviews

Use the arrows to read individual reviews

I used this app to help me merge orders to the main customer profiles and delete the duplicate customer profiles. It was all part of a clean-up project to rid our customer list of duplicates. I ran into a problem with one profile. An order had some how been tagged to the main customer profile and duplicate customer profile. I reached out to Doopelganger support and within the hour Paul responded w...

— Working Wardrobes SE

Paul is unbelievable. The app wasn't exactly what I needed (for now) but he took the time to send me a detailed e-mail to try to help me out. Just fantastic customer service and a sign that he is truly invested in this app. You don't see that much these days!

— Ghosts of Wall Street

I've just started using Doppleganger to help sort through the absurd number of duplicate accounts my store has. Paul has been very responsive to my questions, going to far as to make a video to walk me through adding an additional account to a merged group of accounts and how to unmerge a group of linked accounts - both of which are very easy to do.

— Brim on Fifth

Paul has been of great help. We use Doppelganger to fix customer issues when creating accounts with multiple email addresses, primarily when using our social login feature. We're glad to be doing business with you.

— Chanelia

Very easy to connect customers with multiple accounts. Like the new updates as well. Had an issue with app opening and working this week, sent an email to Paul and he immediately jumped in and worked with me until the issue was found and corrected. He stayed in touch and updated me just like he said he would. Thank you!

— Meghan March Merch

The app is brand new, thus no reviews yet it seems. The developer helped to fix issues asap and the app works perfectly for searching and merging duplicate customer data.

— Nordqvist Tea

App never worked and would not load in admin. reached out to support and submitted their requested info but never heard anything back. My attempts to follow up with support when I heard nothing were met with crickets. Honestly don't bother.

— Stevie Buoy

Does NOT merge the customer. "links" them which does nothing on a search. You still have both customers

— Collegiate Corner

While it says "Find" and merge duplicate accounts, there is not yet any service with which to find them - it does not suggest Doppelganger accounts for merging, you need to already know which accounts you want to merge. I understand this is in development (and not easy!) so I look forward to testing the new app.

— Team Teddy

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