Frequently asked questions
What does 21phi do?
21phi is a Shopify Plus and Hydrogen agency. We design, build and grow DTC ecommerce stores, covering development, UX, analytics, CRO, Klaviyo email and SMS, SEO and AI search optimization.
Who is 21phi a good fit for?
DTC brands on Shopify or Shopify Plus that have outgrown app-heavy themes and want more control, a faster store and growth they can measure.
What is Shopify Hydrogen and why use it?
Hydrogen is Shopify's framework for headless storefronts. It lets us build a fully custom, fast storefront on top of Shopify's checkout and back office, without the limits and app bloat of a standard theme.
Can you migrate an existing store without losing SEO rankings?
Yes. We plan SEO-safe migrations with URL mapping and 301 redirects, keep metadata and structured data, and monitor indexation after launch.
Do you manage email and SMS?
Yes. We run Klaviyo and SMS end to end: flows, launch campaigns, segmentation and win-back, with every change A/B tested.
What is AI search optimization (GEO) and agentic commerce?
AI search optimization makes a brand and its products show up in answers from assistants such as ChatGPT, Claude, Gemini and Siri. Agentic commerce goes one step further: products are described with structured data so AI agents can recommend them and complete a purchase. We set up the schema, content and technical foundation for both.
Do you only build, or also support after launch?
Both. Most clients keep us on after launch as their embedded commerce team for ongoing improvements, analytics reviews, launches and growth work.
Which tools do you work with?
Shopify Plus, Shopify Hydrogen and Oxygen, Sanity CMS, GA4, GTM, Amplitude, Klaviyo, SMS platforms, and integrations with customer service, reviews and fulfillment tools.
Where is 21phi based?
Toronto, Canada. We work remotely with brands across North America.
How do I start a project?
Email admin@21phi.com or use the form below, and tell us about your store and your goals.