Best Klaviyo Email Marketing Agencies for Shopify Brands in 2026

• Shopify depth. Can the team fix the store-side data that flows depend on, or does it hand those problems to someone else?
• Klaviyo standing. Klaviyo’s partner tiers run from Bronze to Elite, with a Master track for agencies that manage client accounts. Tiers are earned through referred and managed revenue plus training, so they are a rough proxy for volume.
• Transparency. Does the agency say what it costs before a sales call?
• Proof. Can it name a client and an outcome?
• Specialization. Retention-only firms at the top Klaviyo tiers bring lifecycle depth and scale that a combined agency may not.

Netalico was founded in 2013, has been a Shopify Partner since 2016, and is now a Shopify Plus Premier Partner, one of the two highest tiers in Shopify’s partner program. It is also a Klaviyo Gold Partner. Netalico says most of its clients are DTC brands doing $2M to $50M in GMV.

What sets it apart is that the developers and the email team are the same company. Custom events, catalog feeds, subscription data, and B2B logic are built by the same in-house team that then writes the flows, so a broken abandoned cart flow does not turn into a ticket bounced between two vendors. For Oatly, the team moved order, shipping, and subscription emails that were spread across Shopify, AfterShip, and Recharge into Klaviyo. For Milestones by Ashleigh Bergman, it rebuilt capture and the core flows and launched SMS; email revenue went from $13K in 2019 to more than $2.2M in 2024.

Its rate card is public. An audit is $1,000, flow packages cost between $2,500 and $6,000, and ongoing campaigns are $1,200 to $5,000 each month. Details are on its Shopify Klaviyo agency page, and it also sells a standalone Klaviyo audit for existing programs.

The team is fully in-house and spread across the Americas, with hubs in New York, Los Angeles, San Francisco, and Miami, and it works US hours.

Andzen describes itself as the first Klaviyo Elite Master Partner in the Asia-Pacific region and the fifth in the world, and says it was named Klaviyo’s APAC agency partner of the year in 2025 and 2026. It has teams covering Australia, the US, and Europe, and it is also a Shopify Plus Partner. Clients listed on its site include Janie and Jack, Lectric eBikes, and MAAP. Andzen focuses on lifecycle marketing, CRM, loyalty, and SMS rather than store builds.

PAASE, based in Bedfordshire, says it was the first UK agency to reach Klaviyo Platinum Master status and the first Elite Master partner headquartered in the UK. Beyond Klaviyo it works with Bloomreach, Salesforce Marketing Cloud, Mapp, and Dotdigital, which suits brands running more than one platform or planning a move between them.

The Orchard Agency is a Melbourne firm that says it has worked with businesses for more than 15 years and holds Klaviyo Master Platinum status. Its services cover email strategy, design, copywriting, database growth, automation, and SMS.

Altum Media is a UK-based Klaviyo specialist holding Master Gold status. Its emphasis is on content, copywriting, and turning first-party data into revenue across email, SMS, and retention.

Email Uplers, formerly Email Monks, runs large email production teams in India and works with brands and agencies worldwide. It is an official Klaviyo partner and builds templates, flows, and automations, often on a white-label basis for other agencies and in-house teams.