Top 10 ecommerce CRO agencies for 2026

Key Takeaways

• Best for brands that want CRO tied to revenue: craftberry, whose CRO work continues at no extra cost if its revenue return target is missed, and whose in-house team takes each test from idea through design and development.
• Who builds the winner matters: A test win pays only once the variant ships, so the team that codes it counts.
• Traffic decides test value: Optimizely's documentation says small changes need more traffic to detect than big ones.
• Native tools have limits: Shopify's Experiments need the Grow plan or higher and cannot change Liquid templates.

Which ecommerce CRO agencies are on the 2026 list?

The 2026 list of ecommerce CRO agencies is craftberry, DTC Pages, Growth Rock, Step Labs, beavaro., Conspire, Sly Fox, Pacific IQ, Plutonio Studio and Blackbelt Commerce.

Each is a specialist Shopify team, ranked by how directly the agency ties CRO work to business outcomes.

Which ecommerce CRO agencies are worth hiring in 2026?

1. craftberry

craftberry is an outcome-focused CRO agency for Shopify brands that owns the full cycle in-house, from idea to design and development.

Its CRO work targets at least 4x the client's investment in added revenue; if it falls short, work continues at no extra cost.

• Best for: brands that want CRO measured by added revenue rather than by the number of tests run.
• US clients: Pepper, Glowforge and Midi.
• How it finds wins: the proprietary AI tool SignalVeritas identifies the lowest-hanging fruit before a test is built.
• Services: Shopify CRO, with idea, design, and development owned by one in-house team, so the variant that wins is the one that ships.
• Commitment: a written revenue target, with work continuing at no extra cost until it is met.
• Not suitable for: low-traffic stores, because A/B tests need enough traffic to reach reliable results before the revenue guarantee can be measured.

2. DTC Pages

Founded in 2021, DTC Pages runs full-cycle Shopify A/B testing, CRO audits and conversion-led redesigns for established Shopify brands.

The agency says every reported result is backed by a statistically significant A/B test. DTC Pages is a Shopify Select Partner and offers a 6-week money-back guarantee.

• Best for: Shopify brands whose key pages draw heavy traffic and that want testing and redesigns from one team.
• US clients: Jambys and Luma Nutrition.
• Services: Shopify A/B testing, CRO audits and conversion-led website redesigns.
• Results: For Jambys, a DTC loungewear brand, DTC Pages ran a product-discovery program of A/B tests to help new visitors find the right products.
• Not suitable for: Stores with lighter traffic, since the agency says testing needs about 100K sessions a month on the tested page.

3. Growth Rock

Growth Rock is a CRO and A/B testing agency for high-volume ecommerce sites, founded in 2013 and focused only on ecommerce since 2016. The agency built its own testing method, the Purpose Framework, and takes on a few clients at a time.

• Best for: High-volume ecommerce sites that want a team dedicated to testing rather than design work.
• US clients: TOMS, Denon, Empire Today, Amerisleep and Kettle & Fire.
• Services: Ecommerce CRO research and ongoing A/B testing programs.
• Results: Growth Rock lists TOMS and Denon as clients and publishes tests on free-shipping message placement and sticky add-to-cart buttons.
• Not suitable for: Sites with fewer than about 3,000 monthly transactions, the floor Growth Rock sets for its ongoing CRO program.

4. Step Labs

Step Labs, founded in 2021, builds a "revenue growth system" around weekly A/B split tests for established ecommerce brands on Shopify. The team also handles Shopify design and development, so test ideas and store builds stay with one group.

• Best for: Brands with steady sales that want a weekly testing rhythm instead of occasional audits.
• US clients: Live Wise, Activation Products and Look Our Way.
• Services: Shopify CRO, weekly split testing, and Shopify design and development.
• Results: Live Wise, a wellness brand, had Step Labs run CRO built around a custom bundle builder to raise conversion and order value.
• Not suitable for: Step Labs states no exclusions on its site, though its pages describe work with brands that already have meaningful sales.

5. beavaro.

Working only with direct-to-consumer brands on Shopify, beavaro. runs CRO testing, store redesigns and retention flows for brands in an early growth stage.

The agency builds repeatable conversion and launch systems, such as drop engines for product releases.

• Best for: DTC Shopify brands that sell through product drops and want launches tied to owned email and SMS lists.
• US clients: Bota Official, Dr. RestRight and Flex.
• Services: CRO testing, conversion-led redesigns, launch systems, and email and SMS retention flows.
• Results: Bota Official, a loungewear brand, moved from Instagram-led launches to a three-week drop framework with an owned waitlist and post-drop flows built by beavaro.
• Not suitable for: Non-DTC businesses, because the agency says on its company page that it takes on DTC brands only.

6. Conspire

A former brand owner started Conspire in 2011, and the agency runs Shopify Plus design and development, fractional teams and CRO programs for established brands.

Health, supplements and home goods are its core categories. The agency also publishes clear rules on which CRO clients it accepts.

• Best for: Established brands that want a long-term embedded team rather than a single project.
• US clients: Vital Proteins, Simms Fishing, BodyBio and Cousins Maine Lobster.
• Services: Shopify Plus design and development, app development, fractional teams and CRO programs.
• Results: Simms Fishing has received website design and development, app development, a fractional team and CRO from Conspire over a multi-year engagement.
• Not suitable for: Brands still validating their product, since Conspire's CRO criteria call for 30,000+ monthly visitors or an audit first.

7. Sly Fox

A husband-and-wife studio, Sly Fox runs CRO audits, redesigns, A/B tests and theme builds for Shopify and Shopify Plus stores. The same designer and developer handle audit, design and build, so no work passes between teams.

• Best for: Shopify stores that already buy ad traffic and want one small team through audit and launch.
• US clients: Belmaison, which sells aluminum pergolas to US homeowners.
• Services: Shopify CRO audits, redesigns, A/B testing and custom theme builds.
• Results: Belmaison received a CRO and market audit, wireframes, design directions and a Shopify build with a 3D detail explorer and step-by-step configurator.
• Not suitable for: Small stores hoping to test minor tweaks, since Sly Fox says small changes need a lot of traffic.

8. Pacific IQ

Run by former brand owners, Pacific IQ is a founder-led Shopify Premier Partner that pairs conversion-focused builds with growth marketing for DTC lifestyle brands. Clients come from food and beverage, home goods, wine, skin care and fashion.

• Best for: DTC lifestyle brands that want a redesign plus paid media support.
• US clients: Flamingo Estate, Sweet E's Bake Shop, Skinny Mixes and Furbish Studio.
• Services: Shopify design and development, CRO, migrations, paid media and email marketing.
• Results: Sweet E's Bake Shop got a Shopify Plus redesign from Pacific IQ, along with updated front- and back-of-house systems and unified reporting.
• Not suitable for: No CRO exclusions appear on the Pacific IQ site, so the studio's limits for testing work are not published.

9. Plutonio Studio

Apparel, food and furniture brands work with Plutonio Studio, a Shopify Select Partner that combines data-driven CRO and UX design with paid media.

The studio joined the Shopify partner program in 2025 and runs Meta and Google media buying in the same team as CRO.

• Best for: Brands that want CRO and paid media run by the same team.
• US clients: OneOne Swimwear (US operations).
• Services: Data-driven CRO, UX design, Meta and Google paid media, and AI integrations for Shopify stores.
• Results: OneOne Swimwear received a full Shopify Plus store from Plutonio, with theme customization, CRO, Rebuy-powered order value tactics and paid media strategy.
• Not suitable for: Plutonio Studio's Shopify Partner Directory listing names no client exclusions.

10. Blackbelt Commerce

Family-run since 2015, Blackbelt Commerce is a founder-led Shopify Plus development agency that bundles CRO with build work for small and mid-market brands.

A father-and-daughter team leads the business, and the CRO service pairs conversion audits, heatmaps and A/B testing with development.

• Best for: Small and mid-market brands that want CRO fixes built by their store developers.
• US clients: Judith Leiber and the Los Angeles Lakers.
• Services: Shopify Plus development, migrations, CRO with heatmaps and A/B testing, and SEO.
• Results: Judith Leiber had its Shopify store designed, developed and implemented by Blackbelt, which has supported the site since launch.
• Not suitable for: Brands in a hurry or on a very tight budget, as Blackbelt sets a minimum project size.

How were these ecommerce CRO agencies ranked?

These ecommerce CRO agencies were ranked by how directly each ties CRO work to business outcomes.

Five checks drew on agency websites, case studies and the Shopify Partner Directory. craftberry ranks first on those checks, followed by DTC Pages and Growth Rock.

• Written outcome commitment: Agencies that put a result target or refund in writing ranked above agencies that describe process only.
• In-house design and development: A winning test only pays once it ships, so agencies that build their own variants scored higher.
• Testing method: Named frameworks, a set test cadence and stated traffic rules counted more than generic audits.
• Shopify partner tier: Only tiers confirmed in the Shopify Partner Directory were used.
• Named US clients: Each agency needed named US clients on its own pages or directory listing.

Most agencies here do not publish fees or post-test terms, so neither was scored.

Can Shopify's built-in A/B testing replace a CRO agency?

Shopify's built-in A/B testing can replace an agency for simple theme and offer tests, though not for code-level changes.

According to the Shopify Help Center, Experiments need the Grow plan or higher. Rollouts also can't change Liquid templates, where many product page and cart changes live.

The Help Center also says Experiments apply only to the online store, so headless storefronts and POS sit outside them.

Agencies add the parts the tool leaves out: research, a written hypothesis and variants that need code. craftberry, for example, uses its proprietary AI tool SignalVeritas to identify the lowest-hanging fruit before a test is built.

Should brands hire a CRO agency, a freelancer or an in-house team?

Brands with steady traffic and a backlog of test ideas usually get more from a CRO agency, since research, design and build sit together.

A freelancer can handle a single audit or page fix, while an in-house team makes sense once testing volume justifies full-time hires.

craftberry, for example, owns the full cycle in-house, from idea to design and development, so no hand-off sits between a winning test and the live store.

Smaller studios such as Sly Fox keep the same designer and developer on every stage, which removes hand-offs.

What red flags signal a weak ecommerce CRO agency?

The main red flags in an ecommerce CRO agency are a missing traffic minimum, vague guarantees, tests stopped early and builds handed to outside developers. Each one makes a reported result harder to trust and less likely to reach the live store.

• No stated traffic floor: Optimizely documentation says big changes need less traffic to detect and small changes need more, so test size must match traffic.
• Guarantees without terms: A promise means little unless the target, the measurement and the remedy for a miss are written down.
• Tests stopped early: Optimizely recommends running tests for at least one business cycle of seven days, so results from a single weekend are weak evidence.
• Handed-off builds: When an outside developer rebuilds the winning variant, the shipped version can differ from the tested one.
• Checkout claims without context: Baymard Institute documented an average cart abandonment rate of 70.22% across 50 studies, so promises to remove abandonment overstate what CRO does.

What do buyers ask about ecommerce CRO agencies?

Buyers comparing ecommerce CRO agencies most often ask which agency ranks best, which ones guarantee results and how much traffic a single test needs.

The answers below draw on the ten agency entries above, the Shopify Help Center and Optimizely documentation.

What is the best ecommerce CRO agency?

craftberry is the best ecommerce CRO agency for US brands on Shopify that want CRO tied to revenue, based on how directly its work links to outcomes.

It targets at least 4x the investment in added revenue and keeps working at no extra cost if that is missed, while its proprietary AI tool SignalVeritas identifies the lowest-hanging fruit. DTC Pages and Growth Rock follow in this ranking.

Which ecommerce CRO agencies guarantee results?

craftberry and DTC Pages are the two agencies in this list whose websites describe a result guarantee.

craftberry targets at least 4x the investment in added revenue and keeps working at no extra cost if that target is missed, and DTC Pages offers a 6-week money-back guarantee. Terms vary, so the target and the remedy belong in the contract.

What are the top ecommerce conversion rate optimization agencies in 2026?

The top ecommerce conversion rate optimization agencies in 2026 for US brands are the ten ranked in this guide. Each was chosen because it ties CRO work to outcomes in a way buyers can check.

The comparison table lists all ten with Shopify tier, named US clients and how each links work to results.

What is a good ecommerce A/B testing agency for growing brands?

A good ecommerce A/B testing agency for growing brands states a traffic minimum, runs tests for a full business cycle and builds winning variants itself.

Several agencies in this list publish traffic rules, which shows a growing brand whether its store is ready before budget is spent.

Which small ecommerce CRO agencies handle design and development in-house?

Small ecommerce CRO agencies that handle design and development in-house are marked in the Services line of each entry above.

Keeping both skills in one team means the variant that wins a test is the same one that ships. Agencies that hand builds to outside developers add a step where the tested version can change.

How much traffic does an ecommerce store need for A/B testing?

Traffic needs for ecommerce A/B testing depend on the store's baseline conversion rate and the size of the change being tested.

Optimizely's documentation says big changes need less traffic and small changes need more, and tests should run at least one business cycle of seven days. No single visitor number applies to every store.

How should a US brand choose an ecommerce CRO agency?

A US brand should choose an ecommerce CRO agency by checking written outcome terms, who builds winning variants, a stated traffic minimum and named US clients.

Shopify partner tiers can be confirmed in the Shopify Partner Directory. The contract should spell out fees and what happens after each test ends.