Intern
What you actually do
Find two welcomes. Kill one. Opt-out test. You are not 'using both to be safe'.
Library / Compare / Shopify Email vs Klaviyo: one lifecycle owner, not a free sender plus a paid one
Shopify Email is included. Klaviyo is the lifecycle tool. Running both as brand mail is the leak — duplicate welcome, stacked discounts, unsubscribes that do not propagate. Shopify Email can be right for a tiny shop with no Klaviyo yet, or transactional-only. Klaviyo is right when flows are the economics. Choose one marketing sender. This is not 'free vs paid quality'.
Shopify Email is included. Klaviyo is the lifecycle tool. Running both as brand mail is the leak — duplicate welcome, stacked discounts, unsubscribes that do not propagate. Shopify Email can be right for a tiny shop with no Klaviyo yet, or transactional-only. Klaviyo is right when flows are the economics. Choose one marketing sender. This is not 'free vs paid quality'.
Klaviyo is right when you will operate flows, events, RPR, segments. It is wrong if you buy it and still send Shopify Email 'because it’s easy'.
Shopify Email is right as a stopgap for a shop that has not installed Klaviyo, or for Shopify transactional. It is wrong as a second campaign channel beside live Klaviyo flows.
Shared leak: two welcomes, two cart panics, unsubscribe islands, dirty events blamed on Klaviyo while Shopify Email also fires.
How to choose: if Klaviyo is in the stack, it wins marketing. If it is not, Shopify Email can exist until the week you turn Klaviyo on — then cut.
Wiring implication: inventory both. Kill duplicate journeys. Check unsubscribe. Event truth still required in Klaviyo. Do not 'A/B the two tools' as dual newsletters.
Intern
Find two welcomes. Kill one. Opt-out test. You are not 'using both to be safe'.
Operator
One lifecycle owner. Transactional vs marketing line. Cut dates, not weans.
CEO
Included email plus Klaviyo is often a mute tax. One owner is the decision. Until collisions are dead, you are paying Klaviyo to fight yourself.
Shopify Email campaigns, Klaviyo flows/campaigns, consent, unsubscribe sync, Placed Order, welcome collision, from-identity.
If Klaviyo is on → Shopify Email marketing off (transactional Shopify may stay)
If Shopify Email only → no Klaviyo campaign/flow until you migrate, then cut Shopify marketing
Unsubscribe in one → respected in the other during any overlap week
Welcome exists in one place
Active automations and campaigns both sides.
Why: You may have two welcomes already.
Done when: A collision list.
Klaviyo if present. Else Shopify Email dated until Klaviyo.
Why: Included is not a reason to dual-run.
Done when: One sentence.
Welcome, abandon, win-back in one tool.
Why: Collisions are the customer-visible leak.
Done when: A test buyer gets one welcome.
Opt out in one, confirm the other respects during overlap.
Why: Islands are how you earn complaints.
Done when: A test opt-out.
Date to disable Shopify Email marketing.
Why: Weaning forever is dual-run.
Done when: A disable date this month.
Flows, events, RPR. Wiring: Shopify Email marketing off, one welcome, unsubscribe true, events audited.
No Klaviyo yet, tiny catalog, or transactional only. Wiring: do not also run Klaviyo campaigns. When Klaviyo turns on, cut Shopify marketing the same week.
Two senders, stacked journeys, island unsubscribes. Free vs paid is not the leak. Dual-run is.
Klaviyo in stack → it owns marketing. Else Shopify until the cut date. Inventory, kill collisions, test opt-out. No forever wean.
Because the tax is mute and unsubscribes, not the invoice. Free second senders are expensive.
Shopify will add features. The rule remains one owner. If you stay Shopify-only, stay. If Klaviyo is the lifecycle, it is the owner.
Transactional can stay. Marketing journeys cannot double. Draw the line on the spec.
This week
This week: collision inventory, pick owner, one welcome, opt-out test, disable date for the loser. No dual campaign calendar.
Both can be a filing cabinet. Neither is a system until write-in and stages are jobs.
Read ↗Pretty vs native does not matter if two links both take Discovery.
Read ↗DTC lifecycle and coaching spines are different jobs. Two senders is a tax.
Read ↗Rebuilding from memory every client is how you never productize. Blasting a zip is how you never train.
Read ↗Working notes
Score your Klaviyo and lifecycle system the way an operator would. Request the file. It arrives by email — not a public dump, not a drip of slogans.
Email and WhatsApp stay open. A call is for installing the system — not for a tour of tools.