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Conversion

Shopify Development Agency · USA

Shopify Plus development that grows revenue

Custom Shopify and Shopify Plus stores engineered for conversion. Themes, headless Hydrogen, replatforming, and post-launch CRO — by a US-based Shopify Plus Partner.

  • Shopify Plus Partner · 200+ stores launched
  • +38% avg conversion lift in 90 days
  • 1.4s median LCP · Core Web Vitals green
  • Pay-on-results growth model
Conversion service illustration in brand blue and green

Conversion in numbers

200+

Stores launched

+38%

Avg conversion lift

1.4s

Median LCP

Since 2018

Building Shopify

About Conversion

A US-based Shopify Plus Partner that codes, designs, and grows

Founded 2018

8 years building Shopify

Shopify Plus Partner

Since 2019

200+ Brands Launched

DTC & B2B

San Francisco, USA

In-house team

Conversion is a Shopify Plus development agency headquartered in San Francisco, serving DTC and B2B brands across the US, Canada, UK, and Australia. We've launched 200+ Shopify and Shopify Plus stores since 2018 — custom Liquid themes, headless Hydrogen, and replatforms from Magento, WooCommerce, and BigCommerce.

What separates us is simple: we treat your store as a revenue system, not a design project. In-house designers, Liquid devs, React engineers, and CRO analysts work in one room — no subcontracting, no handoffs. Every section ships tied to a conversion hypothesis with a measurable lift target.

Why most Shopify builds fail

A pretty theme isn't a growth strategy

We've inherited 60+ stalled Shopify projects from freelancers and generalist agencies in the last three years. The same three problems show up every single time.

Theme-led, not conversion-led

Generic theme installs with hero sliders, parallax effects, and Figma-pretty animations that look great in a portfolio and tank conversion. We start with funnel data, session recordings, and heatmaps — every section earns its place by lifting a metric.

Performance debt baked in

Bloated apps, render-blocking scripts, hydration loops, and unoptimized Liquid push LCP past 4 seconds and INP into the red. We rebuild on a strict performance budget — sub-1.5s LCP and Core Web Vitals greens by default, on real-world mobile.

No experimentation framework

Stores get launched, then sit. No A/B testing harness, no analytics layer, no CRO roadmap, no retention plan. We ship every build with experimentation, server-side tracking, and a 90-day optimization roadmap already wired up.

Tired of agencies that ship pretty themes and vanish at launch?

Book a free 30-minute strategy call. We'll teardown your current store and show you the conversion-blocking issues a rebuild would fix.

30-minute call · No commitment · Custom quote in 48 hours

Shopify development services

Every part of the Shopify stack, built right

Full-service Shopify and Shopify Plus development — from custom Liquid theme to headless Hydrogen to checkout extensibility, custom apps, and ERP integrations. We work in Liquid, JavaScript, TypeScript, React, Remix, and Next.js.

Custom Shopify Theme Development

Bespoke Shopify themes built from scratch in Liquid — not customized templates. Sectioned 2.0 architecture, theme app extensions, and modular content blocks your merchandising team can edit without breaking the build.

  • Liquid + Tailwind / vanilla JS
  • Online Store 2.0 sections everywhere
  • Editor-friendly content blocks
  • Built-in CRO components

Shopify Plus Development

Enterprise-grade Plus builds with checkout extensibility, Shopify Functions, B2B/wholesale, multi-store, and Launchpad automations for high-volume DTC and B2B merchants processing $1M+ GMV.

  • Checkout UI Extensions + Branding API
  • Shopify Functions (discount, delivery, payment, cart)
  • B2B + wholesale catalogs + company accounts
  • Multi-store + multi-currency + Markets Pro

Headless Shopify with Hydrogen

Headless commerce on Hydrogen + Oxygen, or Next.js consuming the Storefront API. For brands that need editorial-grade content, sub-second LCP, complex personalization, or independent frontend deploys.

  • Hydrogen + Oxygen + React Router 7
  • Next.js + Storefront API + ISR
  • Sanity / Contentful / Builder.io integration
  • Edge caching + image CDN

Shopify Migration & Replatforming

Migrations from Magento 1 & 2, WooCommerce, BigCommerce, Salesforce Commerce Cloud (Demandware), Shopware, and custom builds. URL preservation, 301 mapping, and SEO equity protection are non-negotiable.

  • Magento → Shopify Plus
  • WooCommerce → Shopify
  • BigCommerce → Shopify
  • Salesforce Commerce Cloud → Shopify Plus

Custom Shopify App Development

Public and private Shopify apps when off-the-shelf solutions don't fit your business logic. Built on Remix + Polaris with the modern Shopify App Bridge, GraphQL Admin API, and webhook reliability layer.

  • Remix + Polaris + App Bridge
  • GraphQL Admin + Storefront APIs
  • Webhook + bulk operation handling
  • Public app store launch + ASO

Performance & Core Web Vitals

Sub-1.5s LCP, INP under 200ms, CLS at zero. We audit, refactor, and rebuild theme code, app stack, image pipelines, and third-party tag managers until Core Web Vitals are green across the entire catalog on real devices.

  • LCP < 1.5s · INP < 200ms · CLS < 0.05
  • Image CDN + WebP/AVIF + lazy loading
  • Critical CSS + script deferral
  • App audit + Liquid loop optimization

B2B & Wholesale on Shopify Plus

Full B2B implementations on Shopify Plus — company accounts, customer-specific catalogs, volume pricing, net terms, quote requests, draft orders, and gated checkouts. DTC and B2B running on a single store, not two platforms.

  • Company accounts + B2B logins
  • Custom catalogs + volume pricing
  • Net 30 / 60 / 90 + invoice payment
  • Quote-to-order + draft order automation

Shopify CRO & Conversion Design

Conversion rate optimization sprints — landing pages, PDP rebuilds, cart and checkout funnel work, exit-intent flows, and personalization. We run continuous A/B tests with statistically significant lift, not opinions.

  • PDP + collection + cart redesign
  • A/B testing harness (Convert, VWO, GA4)
  • Heatmaps + session replay + form analytics
  • Personalization + segment-based merchandising

Shopify Maintenance & Retainer

Post-launch retainer for ongoing CRO experiments, performance tuning, app conflicts, seasonal campaign builds (BFCM), version upgrades, and security patching. Pay-on-results growth model available.

  • Weekly CRO experiments + reporting
  • BFCM + Q4 launch readiness
  • App stack audits + version upgrades
  • 24/7 monitoring + incident response

Industries we serve

Deep ecommerce experience across 12 high-growth verticals

We've built and scaled Shopify and Shopify Plus stores across the verticals that drive US ecommerce — from fast-moving DTC to regulated B2B.

Fashion & Apparel

Lookbook-led PDPs, size guides, returns flows, drop launches, and merchandising automation. Built to handle BFCM-scale traffic without buckling.

Beauty & Skincare

Quiz funnels, ingredient deep-dives, subscription-first PDPs (Recharge, Skio), bundle builders, and Klaviyo flows that lift LTV.

Health & Supplements

FDA-friendly claims architecture, subscription bundles, recurring billing, and trust-signal-heavy PDPs that pass compliance review.

Food, Beverage & CPG

Subscriptions, perishable shipping logic, multi-pack PDPs, store locators, and high-velocity BFCM builds.

Home & Lifestyle

Catalog-heavy collection pages, room-set imagery, AR product views, and white-glove delivery integrations for furniture brands.

Jewelry & Luxury

High-AOV checkout flows, financing integration (Affirm, Klarna), bespoke product configurators, and editorial-grade Hydrogen builds.

Electronics & Tech

Configurators, comparison tables, technical spec sheets, warranty flows, and post-purchase upsell that lifts AOV by 12-22%.

B2B & Wholesale

Shopify Plus B2B with company accounts, net terms, custom catalogs, quote-to-order, and ERP-driven inventory feeds.

Cannabis, CBD & Regulated

Age-gating, geo-restriction, payment-processor compliance, and content moderation for restricted verticals on Shopify and headless.

Outdoor & Sports

Sizing tools, pre-order and waitlist flows, gear bundles, and seasonal collection launches built for traffic spikes.

Pet & Subscription

Quiz-driven sub onboarding, recurring shipments, dietary preferences, and lifecycle Klaviyo flows that lower churn.

Art, Print & POD

Print-on-demand integrations, artist royalty engines, custom configurators, and licensing-aware checkout.

Whatever your stack — we've already built it

Talk to a Shopify Plus engineer about your build. Quotes within 48 hours, fixed scope, and a measurable lift target on day one.

30-minute call · No commitment · Custom quote in 48 hours

Our development process

From audit to launch in 8–12 weeks

Conversion's four-stage growth process visualized in brand blue and green
01

Audit & strategy

CRO audit, technical audit, and analytics review. We surface every conversion-blocking bottleneck and set a measurable lift target — not just deliverables. Output: written strategy doc and roadmap.

02

Design & architecture

Wireframes and high-fidelity visual design tied to conversion hypotheses. Theme architecture, component library, content model, and integration map — designed to be edited by your team.

03

Build & integrate

Custom Liquid or Hydrogen development, Shopify app and integration work, ERP/PIM/3PL hookups, payment gateways, search, reviews, subscriptions, and pre-launch QA across devices.

04

Launch & optimize

Phased launch with real traffic, GSC + GA4 monitoring, performance verification on real devices, then we wire up A/B testing and start the CRO sprint cycle. The store keeps getting better, week over week.

How we compare

Conversion vs the other options on your shortlist

A side-by-side look at what you actually get from a freelancer, a generalist agency, and Conversion.

FeatureShopify FreelancerGeneralist AgencyConversion
Shopify Plus Partner status——✓
In-house design + dev + CRO—Often subcontracted✓
Headless Hydrogen capability—Rarely✓
Checkout extensibility (Plus)—Limited✓
Migration without ranking lossRiskyInconsistent80+ migrations, zero ranking loss
Core Web Vitals SLA——✓
Conversion lift target on day 1——✓
Pay-on-results growth model——✓
Dedicated US-based teamSometimesOften offshore✓
Post-launch CRO retainer—Add-on✓
Typical project size< $5K$10K – $50K$15K – $250K+
Typical launch timelineSlips often12–24 weeks8–20 weeks, on time

Shopify case studies

Real builds. Real revenue.

Shopify Plus — Skincare DTC

+340%

ROAS lift

From $20K to $80K monthly revenue in 90 days

“They rebuilt our PDP architecture, fixed our app stack, and the conversion rate moved within the first 30 days. The Hydrogen migration paid for itself in 4 months.”

Shopify — DTC apparel

−62%

LCP reduction

Black Friday survived 14× traffic without a single page error

“Our previous theme buckled at 3× normal traffic. Conversion's rebuild handled BFCM with sub-1.2s LCP and zero errors. Best Black Friday we've ever had.”

Shopify Plus — Industrial B2B

+184%

B2B revenue

B2B + DTC running on a single Shopify Plus store

“We were running B2B on Magento and DTC on Shopify. Conversion consolidated us onto Plus with B2B catalogs, custom net terms, and a checkout that actually works for our buyers.”

See what a +38% conversion lift would mean for your store

Most calls end with a number — we run a quick model on your traffic and AOV to estimate the revenue lift a rebuild would unlock.

30-minute call · No commitment · Custom quote in 48 hours

What founders say

Trusted by 200+ DTC and Shopify Plus brands

We had three agencies pitch us. Conversion was the only one who walked in with a teardown of our existing PDP and a hypothesis-driven roadmap. 90 days later we were doing 3.4× the revenue.

Lauren K.

Founder & CEO · DTC Skincare Brand

The Magento → Shopify Plus migration was flawless. URL parity, structured data, redirects — every detail handled. Organic traffic actually went up 18% in the 60 days post-launch.

Daniel R.

Head of Ecommerce · Industrial B2B Manufacturer

They don't ship pretty themes. They ship stores that convert. The CRO retainer alone has paid for itself five times over. We finally have a partner, not a vendor.

Priya M.

VP Digital · Health & Supplement Brand

Hydrogen build delivered in 14 weeks. LCP went from 4.2s to 1.1s. Our editorial team can finally publish without an engineering ticket. This was the right rebuild.

Marcus T.

CTO · Lifestyle DTC

We came off a freelancer disaster — three months over and a broken theme. Conversion took over, scoped a recovery in 48 hours, and shipped a stable Plus store six weeks later.

Sara J.

Founder · Apparel DTC

I've worked with five Shopify agencies in ten years. This is the first one where the engineers, designers, and CRO people are actually in the same room. The output speaks for itself.

Jordan W.

Director of Ecommerce · Beverage Brand

Why Conversion

We're not a theme shop. We're a growth team that codes.

Shopify Plus Partner since 2019

Direct line to Shopify's launch engineers, early access to Functions, checkout extensibility, Hydrogen, and Commerce Components. Your build benefits from the platform's roadmap before it ships publicly.

CRO-first, not design-first

Every section, every component, every interaction is tied to a conversion hypothesis with a measurable lift target. We don't ship pretty stores — we ship stores that convert and keep converting.

In-house US team — no subcontracting

Designers, Liquid devs, React engineers, performance specialists, CRO analysts, and project leads work in one room from our San Francisco HQ. Fewer handoffs, faster iteration, better outcomes.

Pay on results — for growth work

After launch, you can move into our pay-on-results growth retainer. We earn fees only when revenue grows. No flat retainers. No upfront. The incentive structure that aligns us with your P&L.

Headless or traditional, decided by data

Most agencies sell you what they can build. We pick the architecture — Liquid, Hydrogen, or Next.js — based on your traffic profile, content needs, team capacity, and total cost of ownership.

Migration without losing rankings

We've migrated 80+ stores onto Shopify with zero ranking loss. Detailed URL mapping, 301 redirect chains, structured data preservation, and 90-day Search Console monitoring built into every plan.

What you walk away with

A complete revenue system, not just a Shopify store

Every Conversion engagement ships with these artifacts in your hands — yours to keep, edit, and own.

Everything included in a Conversion engagement, laid out as tangible deliverables

Strategy

  • CRO + tech audit deck
  • 12-month optimization roadmap
  • Conversion hypothesis register
  • KPI scorecard + benchmark
  • Competitive teardown

Design

  • Figma design system + tokens
  • Component library
  • All template designs (mobile + desktop)
  • Brand-extensible theme
  • Editorial guidelines

Build

  • Custom Shopify / Plus theme
  • Checkout extensions (Plus)
  • App + ERP integrations
  • GA4 + GTM + server-side tracking
  • QA + accessibility report (WCAG 2.2)

Launch

  • Migration / 301 redirect map
  • Performance baseline + SLA
  • Training videos for your team
  • 30 / 60 / 90-day CRO plan
  • Documentation + runbooks

Ready to ship a Shopify store that actually converts?

One call. One audit. A clear plan with timelines, scope, and a revenue lift target. No retainers. No upfront commitment.

30-minute call · No commitment · Custom quote in 48 hours

Frequently asked

Shopify development questions

What does a Shopify development agency do?
A Shopify development agency designs, builds, and maintains Shopify and Shopify Plus stores end-to-end. That covers custom theme development with Liquid, app and integration work, checkout extensibility on Plus, headless Hydrogen and Next.js builds, B2B and wholesale flows, replatforming from Magento or WooCommerce, and ongoing performance, accessibility, SEO, and CRO work after launch. A senior agency owns strategy, design, engineering, QA, and post-launch growth so the merchant gets one accountable partner instead of stitching together freelancers.
How much does a Shopify development agency cost in the USA?
In the US market, custom Shopify theme builds typically run $15K–$50K. Shopify Plus builds with checkout extensibility, B2B, custom Functions, and ERP integrations run $50K–$250K+. Headless Hydrogen builds usually start at $80K and scale up with editorial CMS, multi-region routing, and personalization. Conversion offers a pay-on-results option for growth work post-launch — you only pay when revenue grows. Get a fixed-scope quote in 48 hours after a 30-minute discovery call.
How long does it take to build a custom Shopify store?
A focused Shopify theme build runs 6–10 weeks. A full Shopify Plus rebuild with custom apps, checkout extensions, B2B catalogs, and ERP integration runs 12–20 weeks. Migrations from Magento, WooCommerce, BigCommerce, or Salesforce Commerce Cloud usually run 8–14 weeks depending on catalog size, customizations, and content volume. We publish a week-by-week roadmap on day one and run a weekly status call for the duration of the engagement.
What's the difference between Shopify and Shopify Plus?
Shopify Plus is the enterprise tier. It unlocks checkout extensibility (custom checkout via Functions and UI Extensions), Shopify Flow automations, Launchpad for scheduled launches, multi-store management for up to 9 expansion stores, B2B/wholesale catalogs with company accounts, dedicated APIs, higher rate limits, and a dedicated launch manager. If you're processing $1M+ GMV, running B2B alongside DTC, expanding internationally, or need custom checkout logic — you need Plus. Conversion is a Shopify Plus Partner with direct access to launch engineers.
Should I hire a Shopify freelancer or a Shopify development agency?
Freelancers work well for small theme tweaks and sub-$5K projects. For replatforming, Shopify Plus, headless Hydrogen, custom apps, performance optimization, or anything with a launch deadline — agencies have the design, dev, QA, and project management depth to actually ship on time. We've inherited 60+ stalled freelancer projects in the last three years. The hidden cost of a freelancer is rebuilding from scratch six months later.
Can you redesign and rebuild my existing Shopify store?
Yes. Most of our work is redesign and rebuild — not new launches. We start with a CRO and tech audit, identify the conversion-blocking issues, and rebuild theme architecture, product pages, collection pages, search, and checkout (on Plus) with measurable lift targets. We retain SEO equity through careful URL preservation, 301 redirect mapping, structured data, and 90-day Search Console monitoring after launch.
Do you build headless Shopify storefronts with Hydrogen?
Yes. We build headless Shopify with Hydrogen + Oxygen, or with Next.js consuming the Storefront API. Headless makes sense when you need editorial-grade content, multi-region routing, complex personalization, or sub-1.5s LCP at scale. For most stores under 100K monthly sessions, a well-built Liquid theme outperforms a poorly-built headless setup — we'll tell you which architecture fits before pitching either.
Do you migrate stores from Magento, WooCommerce, or BigCommerce to Shopify?
Yes. We've migrated 80+ stores to Shopify and Shopify Plus from Magento 1 & 2, WooCommerce, BigCommerce, Salesforce Commerce Cloud (Demandware), Shopware, and custom builds. Every migration includes catalog mapping, customer and order history import, URL preservation with one-to-one 301 redirects, structured data, and post-launch GSC monitoring. Zero ranking loss is the bar — and the metric we report against.
How do I choose a Shopify development agency in the USA?
Look for: Shopify Plus Partner status (verifiable on the Shopify Partner Directory), 5+ years of Shopify-specific work, public case studies with real metrics (not just screenshots), in-house design and dev (not subcontracted offshore), a written CRO methodology, and Core Web Vitals scores on their own client storefronts. Ask to speak to two clients in your stage of growth. We'll connect you to ours on the first call.
Do you offer Shopify maintenance and support after launch?
Yes. Most of our clients move into a retainer for ongoing CRO experiments, performance optimization, app integrations, and seasonal campaign work (BFCM, Q4, product launches). We handle Shopify version upgrades, theme updates, third-party app conflicts, and security patching. Our pay-on-results growth retainer covers post-launch optimization — you pay a percentage of incremental revenue, not a flat retainer.
Are you a Shopify Plus Partner?
Yes. Conversion has been a Shopify Plus Partner since 2019. That gives us direct access to Shopify's launch engineers, early access to Shopify Functions, checkout extensibility, Hydrogen, and Commerce Components releases, plus partner-only training and Plus Academy resources. Your build benefits from Shopify's roadmap before it goes public.
Do you build custom Shopify apps?
Yes. We build private and public Shopify apps using Remix, Polaris, App Bridge, and the GraphQL Admin API. Common builds include: ERP/PIM/3PL connectors, custom subscription logic, B2B pricing engines, advanced product configurators, and headless content APIs. We can also publish to the Shopify App Store if you're building a SaaS app on top of the platform.
Will my Shopify store be SEO-friendly?
Every build ships with technical SEO baked in: server-rendered pages, semantic HTML, structured data (Product, FAQ, Article, Breadcrumb), XML sitemaps, optimized canonicals, hreflang for international stores, and Core Web Vitals greens by default. We also offer Shopify SEO and content services as an ongoing engagement — see our Shopify SEO Agency service for details.
Do you work with US-based Shopify stores only, or international too?
We're headquartered in San Francisco and most of our clients are US-based, but we work with brands across North America, the UK, EU, and Australia. Multi-region storefronts (Markets, Markets Pro, geo-routing, currency switching, hreflang, localized checkout) are a core part of our Plus practice.
What's the best Shopify agency for a B2B build under $80K?
For a B2B Shopify Plus build under $80K, look for a Shopify Plus Partner with real B2B/wholesale experience — company accounts, customer-specific catalogs and price lists, net-terms checkout, quote-to-order flows, and ERP integration — not a theme shop that bolts on a wholesale app. Conversion scopes most B2B Plus builds in the $50K–$80K range: we run a fixed-scope discovery, deliver a week-by-week roadmap, and build the DTC and B2B experiences from a single Plus instance. Book a call and we'll give you a fixed quote within 48 hours.
Can you migrate my store to Shopify Plus for around $50K?
Yes — a focused replatform or wholesale migration to Shopify Plus typically lands in the $40K–$60K range depending on catalog size, customer/order history, integrations, and content volume. That covers catalog and customer/order migration, one-to-one 301 redirect mapping, structured data, a B2B or wholesale catalog if you need it, and 90 days of post-launch Search Console monitoring so you don't lose SEO equity. Migrations from Magento, WooCommerce, BigCommerce, and Salesforce Commerce Cloud are our most common engagements.

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One partner for development, marketing, and SEO

Most Conversion clients run all three workstreams with us — fewer handoffs, one P&L, one team accountable for the revenue number.

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Technical SEO, collection page optimization, schema, content, and AI search (GEO) for Shopify stores. Built on top of every Conversion build.

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Meta + TikTok ads, Google, Klaviyo email/SMS, and CRO sprints engineered to scale Shopify and Shopify Plus DTC brands profitably.

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Shopify Plus Agency

Enterprise Plus builds: checkout extensibility, Shopify Functions, B2B + DTC from one instance, and multi-store international expansion.

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Shopify Migration Agency

Zero-ranking-loss replatforms from Magento, WooCommerce, BigCommerce, and Salesforce Commerce Cloud — 80+ migrations shipped.

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Shopify B2B Development

Native Plus wholesale: company accounts, customer-specific price lists, net terms, and quote-to-order workflows with ERP sync.

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Ready to build?

Build a Shopify store that actually converts

Book a free 30-minute strategy call. We'll review your current store, identify the conversion-blocking issues, and show you exactly what a rebuild — or a CRO sprint — would lift in revenue over the next 90 days.

No credit card · No commitment · Pay only on results