99 Growth Agency®

WEB DEVELOPMENT & SHOPIFY

Built to
convert.
Not just
to impress.

We build Shopify stores, custom apps, and CRO-optimised websites with one goal: turning visitors into buyers. A decade of experience. Zero vanity builds.

Shopify BuildShopify PlusInternational StoresCROCustom AppsMobile AppsSpeed OptimisationConversion Audit
Platform
ShopifyShopify PlusFramerKlaviyoGoogle AnalyticsMeta PixelAlgoliaShipturtleShopifyShopify PlusFramerKlaviyoGoogle AnalyticsMeta PixelAlgoliaShipturtleShopifyShopify PlusFramerKlaviyoGoogle AnalyticsMeta PixelAlgoliaShipturtle
Clients
Rebalance VintageUnited VintageKnown SourceThrift Vintage FashionShedd.appSylkHub VintageKiss The HippoFreshman ArchiveUnited VintageShredRebalance VintageUnited VintageKnown SourceThrift Vintage FashionShedd.appSylkHub VintageKiss The HippoFreshman ArchiveUnited VintageShredRebalance VintageUnited VintageKnown SourceThrift Vintage FashionShedd.appSylkHub VintageKiss The HippoFreshman ArchiveUnited VintageShred

0+

Years building e-commerce stores

Across fashion, wholesale, services

0%

Average CVR on our Shopify builds

vs 1.4% industry average

0d

Average turnaround from brief to live

Full Shopify store build

0

Average Google PageSpeed score

Mobile and desktop optimised

CRO PHILOSOPHY

Your site has one job:
get the sale.

Most websites are designed for the brand - not the buyer.

A site that converts at 4% earns five times more revenue on the same traffic. That is the difference between a site that performs and one that just sits there looking good.

+

Mobile-first architecture - 70%+ of e-commerce traffic is mobile. We design for the phone first, desktop second.

+

Sub-3 second load times - Every second of delay costs 7% in conversions. We target 90+ PageSpeed on every build.

+

Checkout friction removal - 70% of carts are abandoned. We analyse where people drop and fix it.

+

Built for paid traffic - Every landing page and collection is optimised for the audiences you're running ads to.

WHY IT MATTERS

Most agencies build websites.
We build growth engines.

The difference between a site that looks great and a site that performs is strategy - and it shows up in your monthly revenue, not your design awards.

Most Web AgenciesStandard Approach
99 Growth AgencyOur Approach
X
Design-first, conversion second
Beautiful Figma mockups. Impressive agency presentations. Stores that launch to 0.8% CVR because no one modelled the customer journey before writing a line of code.
Conversion-first, then design
We map the customer journey before we open a design tool. Every layout decision is justified by buyer behaviour data, not aesthetics. Looks good is a byproduct, not a goal.
X
Months to deliver, weeks to fix
6-12 week build timelines with moving goalposts. Scope creep, revision rounds, and a handover doc that leaves you maintaining something you do not understand.
14-day average turnaround
From brief to live in two weeks for a standard Shopify build. Tight scope, clear communication, and a team that moves fast without cutting corners on quality or performance.
X
No understanding of paid media
Your site is built in a vacuum. No consideration of where paid traffic is landing, what audiences are seeing, or how ad creative translates to page experience.
Built for the ads you're running
We manage paid media too, so every landing page, collection, and product page is built knowing exactly what Meta and Google campaigns are sending traffic to it.
X
Slow, bloated themes
Stock themes loaded with apps, unoptimised images, and third-party scripts. PageSpeed scores of 40-60 that kill ad Quality Scores and cost you in CPCs and CVR.
90+ PageSpeed. Every build.
Performance is a spec, not a bonus. We target sub-3-second load times, optimise every asset, and audit Core Web Vitals before any site goes live.
X
Handover and disappear
You get the keys to a site you do not understand, a support ticket system you cannot navigate, and a junior developer assigned when something breaks.
Responsive senior team. Always.
You deal with the same senior team that built your site. We respond fast, iterate fast, and treat your store like it is our own.
A great website is the foundation of every great marketing campaign.
Book a free site audit - we'll show you exactly what's costing you conversions
Get a Free Audit

HOW WE WORK

Fast. Focused.
No wasted rounds.

DAY 1-2

Brief, Audit & Strategy

We audit your existing site, review your ad account data to understand where traffic lands and where it drops, and agree the full build scope before work begins. No surprises.

DAY 3-5

Design & Architecture

We map the full customer journey - homepage to collection to PDP to cart to checkout - and design the page architecture before writing code. You review and approve a single round of designs before build starts.

DAY 6-12

Build & Integrate

Theme build, product imports, app integrations, tracking setup, Klaviyo forms, and checkout configuration. We build on a development store so you can review everything before it touches live.

DAY 13-14

QA, Speed & Launch

Full quality assurance across mobile and desktop. PageSpeed audit. Tracking verification through the full funnel. DNS migration and go-live. Launch day is never a surprise.

POST-LAUNCH

CRO & Ongoing Optimisation

30 days of post-launch monitoring. We watch the conversion funnel, identify any drop-off that was not visible pre-launch, and fix it. Then we transition to a monthly CRO retainer if you want the numbers to keep compounding.

RESULTS

Stores we've built.
Numbers they hit.

Second Wave
+22%
Store conversion rate post-rebuild

Shopify store conversion rate optimisation, with full product page redesign, cart drawer optimisation and trsut signal implementation across site.

Xtreme Steam Cleaning
£4 CPL
Leads per month

Six-page custom site built with local SEO, conversion-optimised landing pages, and WhatsApp CTA. GBP4 CPL on paid traffic routed to purpose-built landing pages.

United Vintage
+150%
Revenue growth on rebuilt store

Full Shopify plus rebuild with CRO architecture, speed optimisation, and paid media-aligned collection pages. Launch of new UK website.

Rebalance
+8%
Conversion Rate Optimisation

Product page overhaul combines with design optimisation to increase site speed, let to an 8% increase in conversion rate with expected increase post A/B test.

Sylk
92
PageSpeed score post-optimisation

Theme audit and rebuild of an inherited Shopify store. Page speed improved from 38 to 92. Core Web Vitals all green. CVR lifted within 30 days of relaunch.

FREE SITE AUDIT

Your site is probably converting at a fraction of what it should be.

The average e-commerce site converts at 1.4%. Our builds average 4.2%. The gap is not design - it is strategy, speed, and friction removal. We'll audit your current site, identify every conversion leak, and tell you what it is costing you in revenue every month. No charge. No obligation.

Book a Free Site Audit
30 minutes / Senior team / No pitch

Client Testimonials

What brands say

after working with us

4.9

4.9

/5

We’ve delivered 56+ projects that help companies generate real results.

99 Growth Agency®

56+

Trusted by

clients worldwide

United Vintage

Shopify Rebuild · Wholesale E-Commerce

"The rebuild changed everything. We went from a site we were embarrassed to send paid traffic to, to one that actually converts. The speed alone made a visible difference within a week of going live."

United Vintage

Shopify Rebuild · Wholesale E-Commerce

"The rebuild changed everything. We went from a site we were embarrassed to send paid traffic to, to one that actually converts. The speed alone made a visible difference within a week of going live."

Rebalance Vintage

Shopify Build + Tracking Stack

"14 days from brief to live. I've worked with agencies that took 6 months and delivered less. The tracking setup alone was worth it — we could finally see what our ads were actually doing."

Rebalance Vintage

Shopify Build + Tracking Stack

"14 days from brief to live. I've worked with agencies that took 6 months and delivered less. The tracking setup alone was worth it — we could finally see what our ads were actually doing."

Sylk

CRO & Speed Optimisation

"The site went from a 38 to a 92 on PageSpeed. Our CVR went up without us changing our ads. That's the best ROI we've ever seen from a web project — and it took two weeks."

Sylk

CRO & Speed Optimisation

"The site went from a 38 to a 92 on PageSpeed. Our CVR went up without us changing our ads. That's the best ROI we've ever seen from a web project — and it took two weeks."

FAQ

Questions we get

every time

How long does a Shopify store build actually take?
icon

Our standard Shopify build takes 14 working days from signed brief to live site. This covers: brand and strategy review (days 1–2), design and architecture sign-off (days 3–5), full build and integration (days 6–12), and QA, speed audit, and launch (days 13–14). Shopify Plus or custom app builds take longer depending on complexity — we scope that upfront.

Do you use templates or build from scratch?
icon

Both, depending on your budget and requirements. For most DTC builds we start with a premium Shopify theme (Dawn, Impulse, or similar) and customise it heavily — this is faster and gives you a well-maintained codebase. For complex builds or Shopify Plus, we build custom sections and templates on top. We'll always recommend the right approach for your budget and the level of control you need.

What's included in the tracking setup?
icon

Every build includes: GA4 with enhanced e-commerce events, Google Tag Manager, Meta Pixel with Conversions API (server-side for accurate attribution), and Klaviyo web tracking. We verify every event fires correctly using test orders before launch. If you're running TikTok Ads, we add TikTok Pixel and Events API. Tracking is never an afterthought — it's day one.

Can you migrate our existing store without losing data?
icon

Yes. We migrate products, collections, customer data, and order history. For Shopify-to-Shopify migrations, this is straightforward. For migrations from WooCommerce, Magento, or other platforms, we handle the data mapping and import — with a full audit before and after to confirm nothing was lost. SEO redirects are set up before launch so you don't lose organic rankings.

What's the difference between Shopify and Shopify Plus — do I need it?
icon

Shopify Plus is worth it when you're doing £1M+ per year in revenue, need multi-currency/multi-language stores, want custom checkout scripting, or need B2B wholesale functionality. Below that threshold, standard Shopify with the right theme and apps does everything you need. We'll tell you honestly which one makes sense for your current stage — we don't upsell Shopify Plus to brands that don't need it.

Do you offer ongoing support after the site launches?
icon

Yes. Every build includes 30 days of post-launch monitoring and bug fixes. After that, we offer monthly CRO retainers — where we continue testing, iterating, and optimising the store based on live data. We can also stay on as your development partner for ongoing feature builds, seasonal updates, and app integrations. Nothing drops off after launch day.

How does a good website affect our ad performance?
icon

Dramatically. Your landing page experience affects your Meta Ads Quality Score, your Google Ads Quality Score, and your actual CVR once someone clicks. A slow or confusing site raises CPCs and destroys the ROAS your ad campaigns are trying to deliver. We've seen brands double their ROAS purely from improving site speed and fixing checkout friction — without changing a single ad. The site is the single most leveraged place to invest before scaling spend.

Can you build a custom app if Shopify's native tools don't do what we need?
icon

Yes. We've built custom Shopify apps for everything from automated fulfilment routing to bespoke loyalty programmes to B2B buyer portals. If you can describe the problem, we can tell you whether it needs a custom app, a configuration of existing tools, or a Shopify Plus feature you're not currently using. We scope all custom work upfront with a fixed price — no hourly billing surprises.

How long does a Shopify store build actually take?
icon

Our standard Shopify build takes 14 working days from signed brief to live site. This covers: brand and strategy review (days 1–2), design and architecture sign-off (days 3–5), full build and integration (days 6–12), and QA, speed audit, and launch (days 13–14). Shopify Plus or custom app builds take longer depending on complexity — we scope that upfront.

Do you use templates or build from scratch?
icon

Both, depending on your budget and requirements. For most DTC builds we start with a premium Shopify theme (Dawn, Impulse, or similar) and customise it heavily — this is faster and gives you a well-maintained codebase. For complex builds or Shopify Plus, we build custom sections and templates on top. We'll always recommend the right approach for your budget and the level of control you need.

What's included in the tracking setup?
icon

Every build includes: GA4 with enhanced e-commerce events, Google Tag Manager, Meta Pixel with Conversions API (server-side for accurate attribution), and Klaviyo web tracking. We verify every event fires correctly using test orders before launch. If you're running TikTok Ads, we add TikTok Pixel and Events API. Tracking is never an afterthought — it's day one.

Can you migrate our existing store without losing data?
icon

Yes. We migrate products, collections, customer data, and order history. For Shopify-to-Shopify migrations, this is straightforward. For migrations from WooCommerce, Magento, or other platforms, we handle the data mapping and import — with a full audit before and after to confirm nothing was lost. SEO redirects are set up before launch so you don't lose organic rankings.

What's the difference between Shopify and Shopify Plus — do I need it?
icon

Shopify Plus is worth it when you're doing £1M+ per year in revenue, need multi-currency/multi-language stores, want custom checkout scripting, or need B2B wholesale functionality. Below that threshold, standard Shopify with the right theme and apps does everything you need. We'll tell you honestly which one makes sense for your current stage — we don't upsell Shopify Plus to brands that don't need it.

Do you offer ongoing support after the site launches?
icon

Yes. Every build includes 30 days of post-launch monitoring and bug fixes. After that, we offer monthly CRO retainers — where we continue testing, iterating, and optimising the store based on live data. We can also stay on as your development partner for ongoing feature builds, seasonal updates, and app integrations. Nothing drops off after launch day.

How does a good website affect our ad performance?
icon

Dramatically. Your landing page experience affects your Meta Ads Quality Score, your Google Ads Quality Score, and your actual CVR once someone clicks. A slow or confusing site raises CPCs and destroys the ROAS your ad campaigns are trying to deliver. We've seen brands double their ROAS purely from improving site speed and fixing checkout friction — without changing a single ad. The site is the single most leveraged place to invest before scaling spend.

Can you build a custom app if Shopify's native tools don't do what we need?
icon

Yes. We've built custom Shopify apps for everything from automated fulfilment routing to bespoke loyalty programmes to B2B buyer portals. If you can describe the problem, we can tell you whether it needs a custom app, a configuration of existing tools, or a Shopify Plus feature you're not currently using. We scope all custom work upfront with a fixed price — no hourly billing surprises.

THE FOUNDATION

Great marketing starts
with a site that
actually works.

You can have the best Meta Ads strategy in the world. Perfect creative. Dialled-in audiences. A senior team managing every pound of spend. And still see mediocre ROAS - because the site bleeds the traffic you're paying for.

A website is not a brochure. It's your most important sales tool. We build Shopify stores that are engineered for one thing: turning the visitors your ads send into paying customers. Fast. Clear. Frictionless. Built for the buyer, not the brand.

If your site is not converting at 3%+, you're leaving money on the table every single day. We'll show you exactly how much in a free 30-minute audit.

30-day rolling agreements / Direct senior team access / No lock-in contracts