A print-on-demand studio for Shopify merchants who need more than tees — built for both humans and AI.
Shipping personalized goods with Customei in 42 countries
01 — The studio
Customei is built on six years of print-on-demand experience. Every tool is here because it fixed a real merchant's real problem — not because it looked good in a pitch deck.
Drag the warp handles to wrap artwork around a mug's curve or a sleeve's seam. The print bends to the real surface — cotton weave, glazed ceramic, matte leather — instead of floating on top. Every mockup angle refreshes the moment your customer types.
Text, photos, shapes, QR codes, calendars, maps, star maps, moon phases, Spotify cards, string art — plus word clouds, word searches, and crossword generators. All first-class layers, all live-editable, all print-ready.
Connect a template to as many mockup frames as your product has sides — front, back, in-hand, flat-lay. Every preview refreshes live together, so a customer can flip the mug and watch their name wrap around.
Displacement maps render your print against the real bump of cotton, the curve of a ceramic rim, the crease of a seam. What shows on screen is what ships from the printer.
Text, swatch, color, date, slider, checkbox, upload, dropdown, map, star map — each one hides or shows based on what your customer already picked. No code, just rules.
Colors, fonts, images, categories, trash, restore. Your whole palette, one search away — in every template, every swatch, every editor.
Drop a single block into your theme. Personalization fees sit on real Shopify products so they play nicely with discount codes, abandoned-cart emails, and anything else that reads a cart.
Templates go live on a global CDN the moment you hit save. Whether you sell one mug a week or a thousand a minute, previews and 300-dpi print files load the same.
02 — Niche generators
Every other personalization app gives you “add text to a tee”. Customei ships with five dedicated generators for the POD categories that actually make money.
Tell Customei what you want to sell. In one pass, it drafts the option set, the design template, the Shopify product listing, and a marketing plan — editable before anything touches your store.
Your sky, your date, your place.
Render the exact night sky for any date and latitude/longitude. Powered by d3-celestial. Merchants sell these as anniversary, wedding, and birth-night prints.
Threads from your photos.
Upload a face, a pet, a logo — our algorithm resolves it into thread paths on a circular board, rendered live with progressive zoom, pan, and mobile-aware batching.
Anniversary words. Baby names. Proposals.
A Lambda-hosted smart-placement algorithm renders crossword puzzles at 3000×3000 with four theme presets and four grid styles. Upload a word list — print-ready in 250ms.
Where you met. Where you live.
Mapbox Static Images proxied through our app — pick a style, lat/long, zoom, bearing, pitch, and marker. Runs identically in the admin preview and on the storefront.
03 — How it works
From install to live storefront, most merchants are taking personalized orders in under twelve minutes. We've timed it.
Click Install on the Shopify App Store. Customei scaffolds your shop automatically.
Open the canvas editor. Drag, type, swatch, warp, curve — save when it feels right.
One button. Templates are hashed, uploaded to CDN, and wired into your theme.
Customers personalize live on the storefront and check out — in any currency.
04 — Merchants
"We tried six personalization apps in 2024. Customei is the only one that did not crumble on mobile Safari. The rest is a bonus."
"Our conversion rate on custom orders went up 38% in the first month. Our fulfilment team stopped emailing us about broken artboards."
"The fact that I can edit a template at 11pm and see it live by 11:01 is unreasonable. I keep testing it to see if something breaks."
"Customei's Lambda print pipeline is the first tool where 'print ready' actually means print ready. Our fulfiller finally trusts us."
05 — Questions
Something we missed? Ping hello@customei.app and a real human will write you back within the hour.
Final word
Install Customei in one click. Free plan stays free forever; the paid tiers ship with a 14-day trial. No card. No commitment. No forgotten craft.
Every order ships with something nobody else can buy — a name, a date, a place, a memory.
Start your free trial