Custom Shopify theme or template: how to decide
What changes between adapting an existing theme and building your own, and what to check before choosing for your Shopify store.
Read articleShopify Email vs Klaviyo: choosing for your operation
Compare Shopify Messaging and Klaviyo against the journeys, data and ongoing work your store actually needs rather than business size alone.
Shopify Email, now part of Shopify Messaging, may fit when you want campaigns and automations managed within Shopify through a straightforward operation. Klaviyo may offer more value where events, segments and customer journeys justify a dedicated tool and its maintenance.
Business size alone should not decide it. A small store may have a complex strategy; a high-selling store may need only a few well-maintained automations. Ask what work needs doing and who will do it.
What changed in Shopify's tool
Comparisons describing Shopify Email as merely a newsletter editor fall short. Current Shopify Messaging documentation includes campaigns, segments and automations. Check features and channels for your store and recipients.
This does not make the tools equivalent. It means testing your required journey in current versions instead of relying on an old table labelling all native segmentation “basic”.
| Decision | Shopify Messaging | Klaviyo |
|---|---|---|
| Working environment | Campaigns and automations inside Shopify's ecosystem. | A dedicated platform receiving data through integrations. |
| Data and segments | Check which customer conditions and events meet your case. | Review the events, properties and integrations you will actually use. |
| Operations | May reduce tools if it covers the required scope. | Needs data, flows, forms and deliverability maintenance. |
| Cost | Compare usage and sends with the current rate. | Compare profiles, volume and contracted products. |
Automations: compare a complete journey
Write three cases before opening a builder: subscriber welcome, abandonment recovery and post-purchase communication. Define trigger, wait, exclusion, content and expected result, then check implementation in each alternative.
Block count is not the main issue. Establish whether the correct event arrives, the customer has permission for the message and the flow stops when it loses relevance. A complex diagram with incorrect data does not improve retention.
Segments and data quality
Klaviyo publishes which Shopify data it synchronises and how it represents it. This supports event- and property-based segments only when data arrives with the expected meaning. Check products, amounts, discounts and statuses before using them in rules.
In Shopify, work with its segmentation conditions too and check entry and exit. More filters do not make segmentation better: they should identify a message or timing difference worth the extra effort.
Forms, permissions and opt-outs
Define where subscriptions are captured and which list or segment receives them. If Shopify forms feed Klaviyo, verify synchronisation and the welcome flow. A successful form message does not prove the contact entered the correct journey.
Preserve opt-outs and avoid reactivating contacts during migration. Acceptance of one channel should not transfer to another by default. Test subscribing, confirmation where applicable and unsubscribing before contacting a real audience.
Deliverability matters with both options
Authenticate the domain following provider guidance and review database origin and activity. The tool does not turn purchased or outdated lists into healthy audiences, or guarantee that accepted emails reach the primary inbox.
Work on frequency and exclusions. Compare bounces, complaints, clicks and opt-outs alongside attributed revenue. Opens have limitations and should not be the only measure of campaign quality.
Actual cost and team workload
Calculate cost using your contacts and frequency, including extra channels and expected growth. Then add design, content, analysis and maintenance time. A more advanced platform pays off only if you use and sustain its capabilities.
Request scenarios and check what counts as a billable profile or send in each contract. A website's starting price is not an annual budget for the whole strategy.
When to choose each option
We would keep Shopify Messaging if it covers the journeys and simplifies team work. We would consider Klaviyo for a demonstrable need in segmentation, events, channels or analysis, with someone responsible for maintaining it.
Before switching, review whether the problem is the tool or its execution. Without an acquisition strategy, a permission-based database and worthwhile content, software alone will not solve it.
A review of your Shopify ecosystem can define scope before migrating forms and flows. Choose a tool you can use well rather than accumulating functions nobody maintains.
Further reading for your store
- Implementing Klaviyo with Shopify
- Comparing Shopify email tools
- SMS marketing: countries, permission and cost
Sources and review
- Shopify Messaging: multichannel marketing
- Klaviyo: data synchronised from Shopify
- Shopify: marketing automations
- Klaviyo: diagnosing list- or segment-triggered flows
- AEPD: unwanted advertising and electronic communications
Editorial review: the Migraciones.io team · 30 October 2026. Features, plans and availability are checked against the linked sources.