Comparisons

MergeGuard vs Doppelganger — Which Shopify Duplicate Customer App Actually Wins? (2026)

Head-to-head comparison of MergeGuard and Doppelganger. Features, pricing, and automation compared.

8 min read•Last updated Feb 23, 2026

The 30-Second Answer

MergeGuard

Automation, safety, and scale. Best for growing stores with 100+ orders/month that need hands-off duplicate management.

Doppelganger

Budget option at $5/mo. Best for micro-stores or B2B stores that need account linking without merging.

Head-to-Head Feature Comparison

Feature	MergeGuard	Doppelganger
App Store Rating	⭐ 5.0/5.0	⭐ 3.0/5.0 (7 reviews)
Free Plan	5 merges forever	Free for < 50 orders/mo
Starting Price	$29/month	$5/month
Automatic Detection	✅ Continuous scanning	❌ Manual only
Bulk Merging	✅ One-click bulk merge	❌ One at a time
Auto-Merging	✅ Set rules, auto-merge	❌ Not available
Confidence Scoring	✅ High / Medium / Low	❌ Basic matching
Guest Checkout Abuse	✅ Built-in monitoring	❌ Not available
Pre-Merge Snapshots	✅ Full backup	❌ No mention
Audit Trail	✅ Complete, timestamped	❌ Limited
Real-Time Monitoring	✅ Alerts for new dupes	❌ Manual re-scan
Account Linking	❌	✅ Link without merging
B2B Company Accounts	❌ Not specialized	✅ Company linking
CLV / LTV Insights	✅	✅

Where MergeGuard Wins

🤖

Automation That Actually Works

Doppelganger requires manual scanning and one-by-one merging. MergeGuard runs continuously — detecting, scoring, and optionally auto-merging without you touching anything.

🛡️

Safety You Can Trust

Pre-merge snapshots, complete audit trail, and confidence scoring prevent false positives. Merging is permanent in Shopify — safety features are essential, not optional.

🎯

Guest Checkout Abuse Monitoring

MergeGuard detects customers creating new accounts at the same shipping address to re-use first-time discounts. Doppelganger doesn't address this.

Where Doppelganger Wins

💰

Lower Price Point

At $5/month vs $29/month, Doppelganger costs significantly less. For a pre-revenue store or side project, that matters.

🔗

Account Linking

Doppelganger can "link" duplicate accounts without fully merging them — keeping both profiles intact while showing the connection.

🏢

B2B Company Accounts

Need combined Lifetime Value of all contacts from the same company? Doppelganger can link individual accounts under a company umbrella.

Pricing: What You're Actually Paying For

Plan Tier	MergeGuard	Doppelganger
Free	5 merges + duplicate count + health snapshot	Free under 50 orders/month
Entry	$29/mo → 100 merges, manual review	$5/mo → basic find + merge
Mid	$49/mo → 200 merges + auto-merge + abuse monitoring	—
Top	$99/mo → 500 merges + full suite + priority support	—
Annual Savings	14–16% off	None mentioned

The real question: How much is your time worth? Manually finding and merging 100 duplicates takes hours. MergeGuard does it in minutes.

The Verdict

Your Situation	Our Pick
100+ orders/month, need automation	MergeGuard
Guest checkout enabled	MergeGuard — abuse monitoring is critical
Need audit trail for GDPR/compliance	MergeGuard
Multiple retail POS locations	MergeGuard — multi-signal detection
Under 50 orders/month, tight budget	Doppelganger — free tier is hard to beat
B2B store linking company contacts	Doppelganger — unique linking feature
Want to link (not merge) accounts	Doppelganger

Try Both. Free.

Both apps offer free plans. Install both, scan your store, compare what they find.

Install MergeGuard Free Install Doppelganger

Disclosure: This comparison is published by MergeGuard. We've done our best to be accurate and fair. Feature information was sourced from public Shopify App Store listings as of February 2026.

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