Migrating from BigCommerce to Shopify? We’re here to help.
First&Third is a senior-led Shopify agency that helps eCommerce brands migrate from BigCommerce to Shopify to cut complexity, improve flexibility, and give your team modern merchandising capabilities and a storefront experience that puts your brand first.
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A platform change is a growth opportunity
We help you turn migration into momentum - simplifying your stack, giving your team more control, and setting up a site that can scale with your business.
You’re hitting walls with BigCommerce flexibility
Rigid templates, limited customization, and dev workarounds slow your team down. We migrate brands to Shopify Plus so they can design freely, iterate faster, and run marketing without tech bottlenecks—all while improving total cost of ownership by up to 31%.
Your merchandising strategy has outgrown the platform
BigCommerce can make even simple merchandising feel hard to scale. Shopify Plus gives you the freedom to tell product stories, build bundles, and run promotions fast—helping brands see up to 12% higher conversion at checkout.
You need a partner who’s done this before
Replatforming is a high-stakes move - and the details matter. We bring proven migration strategy, hands-on dev experience, and deep Shopify Plus knowledge to help your brand move cleanly and unlock performance gains from day one.
Brands we've helped
What our clients say
The First&Third team has quickly become an invaluable extension of our Shopify Plus team. Their efficiency, productivity, expertise and solution oriented approach is second to none and highly valued by our entire organization. I am continually impressed with their work quality and professionalism. They make the vendor, agency relationship both easy and invaluable.
As a Shopify Plus Partner we offer a wide range of services
Hubspot integration
Seamlessly integrate Hubspot to power your marketing campaigns.
Headless integration
Experts in Headless e-commerce for optimal site performance and full site customization.
Custom integrations
Build custom features and reporting dashboards to get exactly what you and your customers need.
Custom theming
You don't need to be limited by Shopify's base feature set.
Campaign & landing page development
Easily create templated landing pages to optimize your ad spend.
Building custom scripts
Use custom scripts to achieve advanced promotions such as tiered discounts and bundling.
Conversion rate optimizations
We'll identify opportunities to optimize conversion rate and run A/B tests to continue to improve.
Migrations to Shopify
Ensure that your business will run seamlessly when migrating to Shopify.
Full-scale design and development
We can run with your ideas, from design to development to launch.
Strategy workshops
We run strategy workshops to understand your goals then build a prioritized product roadmap to achieve them.
Site speed audits
A faster site means happier customers and higher conversions.
Website management
We provide the support you need to run your web store and provide admin documentation.
What our clients say
We've partnered with First&Third for the past 3 years – and the length of our partnership is a testament to the quality of their work and team. Everyone on their team has been attentive, responsive and extremely easy to work with. Our company's needs are ever changing, and we're usually on very aggressive schedules. Despite this, they have successfully tackled all of our Shopify Plus needs, including one-off custom requests. I highly recommend them without hesitation.
Our Process
Discovery & Strategy
We run collaborative Discovery workshops with your team to help us understand your customers along with their goals and your goals for the site as well. We then work with you to create a prioritized feature list and roadmap for the project so your team will know what to expect going forward.
Design
We will run a Design workshop that helps us understand what you like about your current site and where we can take inspiration for improvements. We'll then finalize a brand look and feel and design the pages of the site.
Development
Taking the approved designs, we develop the site with the ultimate goal of letting you manage it. We make sure to keep as much of the management of the site going forward in your hands so you don't need extra development work to keep your business running.
Testing & Launch
Before launch, we run exhaustive QA testing and ensure that you have time for testing as well. This gives you an opportunity to familiarize yourself with the site and gives us the chance to train you on managing the site going forward. Once we're bug free, then we launch and monitor the site for any unforeseen issues over the next 30 days.
What our clients say
First&Third has been an important partner for us as we’ve expanded our DTC capabilities. They were able to quickly understand our backend and work with us to prioritize our projects based on timelines and ROI. They’re extremely responsive, offer sound strategic and tactical support, and are an absolute pleasure to work with. I’d highly recommend working with them!
FAQs
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