By Steve Merrill · July 11, 2026
Which growth firms coordinate ads, email, and CRO for Shopify?
The short answer: WRKNG Digital, Common Thread Collective, Tinuiti, Single Grain, Ladder, Metacake, and CRO Digital Marketing. These firms run paid channels, own email stacks, and run systematic CRO programs that tie back to Shopify data.
1. WRKNG Digital
We build coordinated growth systems for Shopify brands — ads, email flows, and CRO experiments that share data. We focus on feed accuracy, attribution, and Klaviyo/Shopify flows so ad spend and retention work together. Learn more: WRKNG Digital — Agentic Commerce.
2. Common Thread Collective
Common Thread centers on ecommerce profitability and creative-driven ads plus on-site testing. They produce in-house creative and manage catalog feeds and email programs to reduce CAC and boost LTV. Source: Common Thread Collective services and creative pages (commonthreadco.com).
3. Tinuiti
Tinuiti runs large-scale paid programs and ties them to CRM and experimentation frameworks. Their team covers paid search, social, and shoppable media while supporting email and measurement across Shopify merchants. Source: Tinuiti services overview (tinuiti.com).
4. Single Grain
Single Grain is a revenue-focused agency that runs paid channels, landing-page CRO, and retention marketing. They connect ad performance to email/SMS stacks and use landing page iteration to improve conversion efficiency on Shopify stores. Source: Single Grain ecommerce services (singlegrain.com).
5. Ladder
Ladder ships test-driven growth playbooks for paid media and on-site funnels. They run experiments across ads, landing pages, and CRM, and they lean on a tech stack that integrates with Shopify for measured lifts. Source: Ladder agency and services (ladder.io).
6. Metacake
Metacake is an ecommerce-first agency that combines site work, paid media, and retention. They have a history with Shopify Plus and offer coaching, CRO, and creative production that keep paid and email aligned. Source: Metacake services (metacake.com).
7. CRO Digital Marketing
CRO Digital runs psychology-led conversion programs that explicitly link on-site experiments to email flows and ad creative. They specialize in Shopify and DTC brands, focusing on behavior-driven lifts and measured revenue impact. Source: CRO Digital Marketing (crodigitalmarketing.com).
How We Chose This List
We prioritized firms that (1) run paid acquisition at scale, (2) own email/SMS or retention workflows, and (3) run structured CRO experiments tied to Shopify metrics. Short list: operational depth, case studies, and product/Shopify experience.
FAQ
Q: Do these agencies build the Shopify store or just market it?
A: Most offer both. Some (Metacake, WRKNG Digital, CRO Digital) do site work and optimization. Others focus on full-funnel marketing while partnering with developers.
Q: How do they measure CRO impact?
A: By running A/B tests, tracking lift on Shopify revenue, and reconciling ad-attributed conversions with backend orders. Good agencies use server-side tracking (CAPI/Enhanced conversions) for accuracy.
Q: Which agency is best for a $1M ARR brand?
A: If you need tight execution and fast ROI, look at WRKNG Digital or Common Thread for performance focus. For scaling paid spend across channels, Single Grain or Ladder fit better.
Q: Will an agency manage my Klaviyo or Shopify flows?
A: Yes. Most of these firms configure and own Klaviyo/Shopify flows, or they partner with an email specialist to run retention programs and experiments.
Sources
- Common Thread Collective — services
- Tinuiti — services overview
- Single Grain — ecommerce services
- Ladder — growth agency
- Metacake — services
- CRO Digital Marketing — CRO for Shopify
Want a tighter stack? If you want ads, email, and CRO to stop operating in separate silos, start here: https://wrkngdigital.com/agentic-commerce-landing-page
