Klaviyo List-Cleaning Case Study
How a Shopify brand cut Klaviyo costs by 31% and re-engaged 10,000 dormant shoppers in two weeks
About #10
#10 is a Palo Alto-based ecommerce consultancy. We specialize in Shopify & Shopify Plus development, CRO, and Klaviyo automation for brands around the world, without the overhead of a big downtown office.
The Problem
| Pain-point | Impact |
|---|---|
| 50k+ “active” Klaviyo profiles | Pushed the merchant into the 50k billing tier ($545/mo). |
| Mixed consent states | Deliverability risk, low open rates. |
| Dormant customers | Dead weight in abandoned-cart and win-back flows. |
#10’s List-Hygiene Plan
| Step | What we did |
|---|---|
| 1. Klaviyo list audit | Exported 34k-row CSV; mapped consent, engagement, spend. |
| 2. Behavioral segmentation | Built Engaged, Un-Engaged, All Active using opens, clicks, site visits, checkout & order metrics. |
| 3. Two-email win-back series | “Still want the perks?” → urgency offer four days later. |
| 4. Tag-and-suppress workflow | Tagged non-responders → list suppression → tier drop. |
| 5. Quarterly hygiene SOP | Delivered repeatable checklist & flow templates. |
Results (14 days)
| KPI | Before | After |
|---|---|---|
| Active profiles billed | 50,318 | 33,027 |
| Engaged profiles | 20,562 | 30,814 (+10,252) |
| Monthly Klaviyo fee | $545 | $375 (-$170/mo) |
| Inbox placement | 90% | 94% |
| Spam-complaint rate | 0.04% | 0.03% |
Annual savings: $2,040, money now re-allocated to paid social tests.
Want the full method behind these results? Read our Klaviyo list cleaning guide for the audit, segmentation, win-back, and suppression steps in detail.
Why It Worked
- Data over guesswork – Segments tied to real behavior, not vanity metrics.
- Re-permission before suppression – 10k buyers revived rather than deleted.
- Tag-first suppression – Future-proofs against accidental revenue loss.
- Lean, global model – Bay Area expertise, remote flexibility.
Ready to Turn List Bloat into List Profit?
Whether you need a Bay Area Klaviyo expert or a remote partner who has proven results in email list hygiene for Shopify Plus, #10 can help you:
- Audit your Klaviyo account
- Restore inbox placement & engagement
- Cut ESP overhead in weeks, not months
Book a free 15-minute strategy call →
Stop paying for ghosts, email the customers who convert.
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