What a full-service Klaviyo agency does
A full-service agency typically owns the marketing function end to end: flow and campaign strategy, email/SMS copywriting, template design, send calendar, list growth tactics, and often A/B testing on subject lines and creative. Billing is usually a monthly retainer tied to send volume or account size. This is valuable work, and if what you need is more/better campaigns, this is the right kind of partner.
What we do instead
We do not write copy, design templates, or run campaign strategy. We are a data and tracking engineering practice that works on the layer underneath the marketing function.
- Event architecture - custom event tracking via the Events API for triggers Klaviyo doesn't capture by default.
- Integration wiring - full-fidelity Shopify, WooCommerce, and BigCommerce integration, not just the default connector.
- Revenue attribution - reconciling what Klaviyo reports against your source-of-truth analytics.
- Deliverability infrastructure - authentication, list hygiene, and sending reputation diagnostics.
- Segment data quality - profile deduplication and property hygiene so segmentation logic doesn't rot.
Side by side
| Question | Full-service agency | Webclat (engineering) |
|---|---|---|
| Writes email/SMS copy | Yes | No |
| Designs templates | Yes | No |
| Plans send calendar/campaign strategy | Yes | No |
| Builds custom event tracking | Rarely, not their core skill | Yes |
| Fixes Shopify/WooCommerce integration gaps | Sometimes, via a developer subcontractor | Yes, directly |
| Reconciles revenue attribution vs. GA4/Shopify | Rarely | Yes |
| Diagnoses deliverability infrastructure | Sometimes at a surface level | Yes, at the infrastructure level |
| Engagement shape | Ongoing retainer | Scoped project with a technical deliverable |
How to tell which one you need
If the complaint is "our flows aren't converting" or "our emails look dated," that's creative and strategy - hire an agency. If the complaint is "our Klaviyo revenue doesn't match Shopify," "we can't track a custom event," "our deliverability dropped and we don't know why," or "our segments include people who shouldn't be in them" - that's the data layer, and that's us.
Plenty of accounts need both, run in parallel by two different partners who don't compete for the same budget line, because they're not doing the same job.