Shopify speed optimization service
· 4 min read
Our Shopify speed optimization service measures the speed real customers experience and fixes what slows them down. We test changes to pages and features to learn what helps people buy, as your ongoing development team rather than a one-off score cleanup.
Talk through your store’s performance
Start with what your customers experience
If you lead ecommerce or run a Shopify brand, the question is not just whether a test score looks better. It is what slows your customers down and which improvements are worth making next.
Our Shopify performance optimization work starts with real-user performance: measuring page-load speed from customers’ visits, tracking what slows them down, and fixing the problems. We keep measuring after changes rather than treating speed as a finished checklist.
Want a first read before we talk? Run our free Shopify speed test to see your PageSpeed scores, real-user Core Web Vitals and the apps slowing your store down.
Real-user performance · A/B testing · Ongoing development
Does your store need cleanup or ongoing development?
A standard theme store with too many apps may first need simple cleanup. Start with Shopify’s own store-speed guidance before assuming you need a custom storefront or a larger development engagement.
We can improve an existing store; a rebuild is not the starting assumption. We use available features and apps when they do the job, and recommend custom development when the benefit is worth the cost of building and maintaining it.
Ongoing Shopify store speed optimization fits a team that wants to keep improving pages and features after the first project. If you also need complex content operations or custom product experiences, explore our headless Shopify development approach. Headless adds complexity and ongoing maintenance; speed alone is not a reason to choose it without comparing the options.
Measure, fix, then test what helps people buy
Measure the speed real customers experience
We measure page-load performance from actual visitors. Kastel’s storefront includes performance measurement and experimentation tools, with ongoing work after launch.
Fix what slows them down
We track what affects speed and work on the problems. The priorities should follow your current store and what you want to improve, not a promise of the same score or load time for every merchant.
Test changes to the buying experience
Speed work sits alongside experiments on pages and features. For Kastel, we worked on discounts, shipping thresholds, product recommendations and bundles, testing different ways to present them after launch.
Keep improving after the first project
We look after what we have built and continue improving it with you. We agree the priorities, scope and commercial terms together, so you know what the ongoing work includes.
Relevant work, with the results in context
Kastel: measurement and experimentation after launch
We built Kastel’s headless Shopify storefront with performance measurement and experimentation tools to keep improving the buying experience after launch. The work included product and campaign pages and shared content across markets, followed by testing discounts, shipping thresholds, recommendations and bundles.
Kastel’s +22% average order value and +6% conversion rate YoY compare the first year after launch with the year before. They describe the store’s performance over that period, not the isolated effect of speed optimization or any one change. They are not a forecast for your store.
Epivity: a performance-focused subscription storefront
Epivity’s headless Shopify storefront combines a self-serve subscription model with a focus on performance. Its case study describes the site as “Built for performance — Sub-second page loads.” That is a delivered project example, not a load-time promise for every store.
Explore the Epivity storefront
Frequently asked questions
What does your Shopify speed optimization service include?
We measure the speed real customers experience, fix what slows them down, and test changes to pages and features to learn what helps people buy. We agree the priorities and scope with you, then continue improving the work as your development team.
How do you measure Shopify site speed?
We measure page-load speed from real customers’ visits and track what slows them down. Our focus is the experience people have in the store, rather than treating a one-off test score as the whole outcome.
Do we need a new headless storefront to make our store faster?
Not necessarily. We can improve your current store and recommend rebuilding when it is worth the cost and effort of moving. A standard theme store with too many apps may need simple cleanup first; start with Shopify’s own speed guidance and compare that with your wider requirements.
Will speed optimization increase our conversion rate?
We test changes to learn what helps people buy; we do not promise a conversion uplift from speed work. Kastel’s +22% AOV and +6% conversion rate YoY compare the first year after launch with the year before, across the store’s work during that period. They are not the isolated effect of speed optimization.
Can you work alongside our existing team?
Yes. We can take on part of the work alongside your team. On the first call, we discuss who is involved and who will handle what.
What happens after the first project?
We look after what we have built and continue improving it with you. We agree the priorities, scope and commercial terms together, so you know what the ongoing work includes.
What is slowing your store down?
Tell us what you want to improve and what you have tried. We can help compare the options, whether that means improving your current store or evaluating a larger change.
