Best Ecommerce CRO Agencies for Shopify Brands in 2026 (and When Software Is Enough)

The best ecommerce CRO agencies for Shopify brands in 2026 include SplitBase, Blend Commerce, craftberry, Swanky, GrowthRock, The Good, Speero and Conversion. Each runs research and A/B testing for online stores. Nudge is the software option: a platform that builds and tests a page for each traffic source, run by your own team.

What does an ecommerce CRO agency actually do?

A CRO (conversion rate optimization) agency finds where shoppers drop off and tests changes that fix it. Most engagements follow the same arc: an audit of analytics, session recordings and the site itself, a prioritized roadmap, then a steady run of A/B tests that a team designs, builds and reports on.

Ecommerce specialists add store-specific work: product page and cart tests, subscription and bundle flows, Shopify theme development, and sometimes a full conversion-led redesign. The best ones leave you with a test library you keep. For the basics of what to test first, see CRO best practices.

CRO agency vs CRO software: which does a DTC brand need?

It depends on who will do the work. An agency brings people: researchers, designers, developers and an analyst who owns the testing program. CRO software brings a system: tests, pages and reporting that your own team runs every day.

For a DTC brand, the deciding question is ownership. If no one in-house can own conversion, an agency fills that gap fast. If you have a growth or ecommerce lead who needs more output than their calendar allows, software is usually the faster and cheaper start. Many brands use both, which the last section covers. If you want to see how AI shoppers currently see your catalog before choosing, the free catalog scan takes a few minutes.

Is it worth hiring a CRO consultant or using an AI testing tool?

A consultant or agency is worth it when the problem is diagnosis: you do not know why the site underconverts, and you need research, judgment and a roadmap. An AI testing tool is worth it when the problem is throughput: you know roughly what to test, but your team cannot design, build and read enough variants.

Two signs point to a tool first. You get traffic from several distinct sources (AI answers, Meta, Google, email) that land on the same generic page, and your test velocity is limited by build time rather than ideas. Two signs point to a consultant first: conversion is low everywhere and no one knows why, or the site itself needs a rebuild.

The best ecommerce CRO agencies for Shopify brands, plus the software option

1. Nudge (software, not an agency)

Nudge is the agentic commerce platform for consumer brands. It is software your team runs, not a service, and it covers two moments: getting your brand recommended where shoppers discover products, and converting whoever arrives.

On the conversion side, Nudge Funnels generates and tests variations of product pages, category pages and landers, built from a ranked opportunity, your catalog data and your brand kit. Each traffic source gets its own experience: for organic and AI traffic, one product URL serves a different journey by origin, and every ad can get its own lander. Every funnel runs against your default page as the control, with significance gating, and reports revenue per visitor, conversion rate and funnel GMV.

The input most CRO programs lack is what the shopper asked before they clicked. Nudge AI Visibility tracks the prompts in your category across ChatGPT, Gemini, Perplexity and Google AI surfaces, so the platform knows which questions bring shoppers to which products. Nudge Catalog Enrichment scans every product for AI readability and ships JSON-LD and Shopify taxonomy fixes behind an approval step.

Honest limit: Nudge does not run qualitative user research, rebuild your theme or give you a dedicated strategist, and it is built for consumer brands selling online, not SaaS or lead generation.

2. SplitBase

SplitBase calls itself a CRO agency for 8 and 9 figure ecommerce brands, and says most of its clients are DTC brands on Shopify doing $10M or more a year. Services include full-site A/B testing, Shopify CRO, landing page design and optimization, conversion-focused redesigns and CRO audits.

It is one of the few with public pricing: its FAQ says CRO programs typically run $8,500 to $15,000 a month, depending on traffic and test volume. Best for larger Shopify brands that want a full testing program run for them.

3. Blend Commerce

Blend Commerce describes itself as a conversion rate optimisation agency built specifically for Shopify brands. Its work is split into CRO Insights (an audit with a prioritized roadmap), CRO Implementation (ongoing A/B testing, quarterly reporting and a learning library) and CRO Redesign, plus Shopify development and integrations such as Rebuy and Recharge.

It serves brands across the US, Canada, the UK, Europe, the Middle East and Australia. Pricing is not public; work typically starts with a one-off audit, then monthly optimization.

4. craftberry

craftberry is a Shopify Premier Partner that works with ecommerce brands generating $2M+ a year. Alongside Shopify design, development and migrations, it offers conversion rate optimization, Shopify A/B testing and AI CRO. Its footer lists Varna, Bulgaria, and it serves clients in Europe and the Americas.

A good fit if you want CRO from the same team that builds and maintains your Shopify store. Pricing is quoted after contact.

5. Swanky

Swanky is a full-service Shopify Plus agency and a Shopify Platinum Partner, with offices in the UK, Australia and France. Conversion rate optimisation sits in its Grow practice next to data and analytics, email, paid media, SEO and agentic commerce.

It suits Shopify Plus brands, especially in the UK, that want CRO inside a broader growth engagement. No pricing is listed.

6. GrowthRock

GrowthRock leads with conversion optimization through A/B testing, built on analytics, user recordings and qualitative feedback. It says the service is available to ecommerce sites on any platform making $10 million or more a year, and it adds a Shopify development team for Shopify and Shopify Plus brands.

Best for established brands that want a testing-first program with in-house Shopify builds. Pricing is discussed after a contact form.

7. The Good

The Good is headquartered in Portland, Oregon, and calls its work Digital Experience Optimization, run as its DXO Program. Its ecommerce line covers UX improvement, ROAS, conversion, abandonment, customer research and validating design decisions, using UX research, behavioral analytics and A/B testing.

It also serves SaaS, so ask for ecommerce examples. Pricing is not public.

8. Speero

Speero runs experimentation programs and lists Ecommerce, DTC and Retail first among the industries it serves, alongside SaaS and travel. Services include CRO, experimentation maturity audits, research and strategy, analytics audits and growth engineering, with offices in Austin, Tallinn and London.

It fits brands that want to build an in-house experimentation practice with outside support, not only outsource tests. Pricing is not published.

9. Conversion

Conversion says it has over 100 CRO specialists across the UK and North America. It offers A/B testing and optimization roadmaps, personalization, product and pricing experimentation, research and conversion-centered design, plus Liftmap, its own experiment repository and reporting app.

Its clients span ecommerce, financial services, media and SaaS, so it suits larger brands running an enterprise-scale testing program. Pricing is not public.

How do the options compare?

Details are as published on each site on 2026-11-11 and can change.

How to choose an ecommerce CRO agency

• Ask how tests are measured. Look for a control, a stated significance threshold and revenue per visitor, not just conversion rate.

• Ask who builds the tests. Agencies with in-house Shopify developers ship faster than those that hand designs to your team.

• Ask about traffic segments. Paid social, search, email and AI-referred shoppers arrive with different intent. Ask whether the program tests by source or treats all traffic as one.

• Ask for relevant case studies. DTC or Shopify examples, with the metric and the time period.

• Ask what you keep. The test library, designs and learnings should stay with you if the contract ends.

For a do-it-yourself start before you hire anyone, the guide to starting A/B testing on Shopify covers the setup.

Agency vs software vs both: when is Nudge enough?

Nudge alone is enough when you have a growth or ecommerce lead who can review opportunities and approve pages. The platform proposes the funnel, builds the variants, runs them against your default page and reports the result, so one owner can run more tests than a small team building by hand. For how the tooling fits together, see CRO experimentation tools for commerce brands and the top CRO platforms for ecommerce.

An agency alone makes sense when the site needs a rebuild, conversion is weak everywhere and the cause is unclear, or no one in-house can own the program.

Both works well, and agencies are a strong channel for it. The agency brings research, design judgment and theme work; Nudge gives them source-level pages and a controlled read on every variant, so retainer hours go to the ideas rather than the builds. The same split applies to AI search work, covered in the best AEO agencies for ecommerce.

Whichever route you pick, remember that more of your traffic now arrives after a conversation with an AI assistant. The page it lands on should match what that shopper asked. To see both moments in one platform, book a demo.