A Shopify development agency that ships stores built to convert
Horizon is a Shopify development agency and Shopify Plus partner shipping fast, conversion-first stores. Shopify development services covering custom themes, headless builds, private apps, migrations and CRO — the difference between a store that looks good and one that hits a real revenue target.
What you gain working with Horizon
Shopify development that ranks and converts
As a Shopify development agency we ship product and collection pages with real on-page SEO, Core Web Vitals in the green, and a checkout tuned to shave abandonment — not just a pretty theme.
Headless when it earns its keep
Shopify development services include headless (Hydrogen, Next.js) when the store genuinely needs the speed and control — and honest advice to stay on a themed build when it doesn't. No overselling.
Custom apps and integrations
Private Shopify apps, custom flows, ERP/3PL sync, subscriptions, B2B pricing and wholesale portals. If the app store doesn't have it, we build it.
Ongoing CRO, not just a launch
Post-launch we run A/B tests, product page rewrites, cart optimizations and analytics reviews on a monthly cadence. Compounding revenue is where a Shopify agency earns its retainer.
Everything you get in the package
- Store audit, IA and conversion strategy
- Custom Shopify or Shopify Plus theme development
- Headless build (Hydrogen / Next.js) when warranted
- Payments, shipping, taxes and product catalog setup
- Private apps and third-party integrations (ERP, 3PL, CRM)
- On-page SEO, Core Web Vitals and monthly CRO
Shopify development agency
Shopify and Shopify Plus builds — custom themes, headless, apps and CRO.
from €498
Request a tailored quoteFrequently asked questions
What does a Shopify development agency do?
A Shopify development agency designs and builds stores on Shopify or Shopify Plus — custom themes or headless front-ends, private apps, integrations with ERP/3PL/CRM, plus ongoing conversion optimization. A proper Shopify agency owns performance, SEO and revenue outcomes, not just visuals.
How much does Shopify development cost?
A conversion-first custom theme build typically runs $8k–$25k. Shopify Plus and headless projects range from $25k–$80k depending on integrations and custom apps. Monthly CRO and development retainers start at $2k/mo. Fixed scope, fixed price per milestone.
Shopify vs custom ecommerce — which is right for me?
Shopify is the right answer for 90% of DTC and B2B brands under ~$50M — it ships faster, costs less, and Shopify Plus scales further than most founders assume. We only recommend fully custom ecommerce when Shopify genuinely can't handle your business model, and we'll tell you so upfront.
Do you migrate from other platforms to Shopify?
Yes. WooCommerce, Magento, BigCommerce, Wix and legacy custom stacks. We migrate products, customers, orders and 301-redirect old URLs to preserve SEO — one of the most common ways we lose or save clients five figures.
Do you also build custom Shopify apps?
Yes. Private and public Shopify apps for subscriptions, B2B pricing, wholesale portals, custom checkout flows, ERP/3PL sync and anything the public app store doesn't cover. Built as a Shopify development company, not a WordPress shop dabbling in Shopify.
Book your free consultation
Pick a day and time that suit you. We talk 1:1 about your business — no obligations.
July 2026
Almost there
Select a day and time, then fill in your details to confirm the free consultation.