Shopify Plus development agency
Shopify Plus, set up to earn its monthly fee
For brands upgrading from Shopify or arriving from another platform, and for Plus merchants whose checkout and discounts still run on Scripts. We handle checkout UI extensions, Shopify Functions for discounts and bundles, B2B with company accounts, price lists and net terms, Markets, multi-store setups, Launchpad and Flow. You pay for all of it already.
Happy clients
Every project begins with a written scope and a fixed price, and starts within 3–5 business days. You get a staging store to click through, an update at least every 48 hours in one shared Slack channel, and a weekly call. The senior engineer on the first call is the one writing the Functions.
We have worked with more than 40 Shopify Plus merchants and app owners. emma&noah runs a checkout address-validation extension and a mix-and-match bundle creator we built, and average order value went up 61% after the bundle creator launched. Ryzon’s custom bundle app, Odd Bunch’s storefront and Better Health’s theme are Plus builds of ours too.
What Shopify Plus work includes
- 01Checkout UI extensionsAddress validation, delivery notes, gift options, upsells and custom fields in the checkout, built as checkout UI extensions so they keep working after Shopify updates the checkout. The emma&noah address-validation app is one of these.
- 02Shopify FunctionsDiscount, bundle, shipping and payment logic as Functions: tiered discounts, bundle pricing, hiding a payment method for wholesale orders. Ryzon’s bundle app runs this way. If you still have Scripts, we list each one and rebuild it as a Function.
- 03B2B on the same storeCompany accounts, customer-specific price lists, net payment terms and a wholesale storefront on the same Plus store as retail, so one catalogue and one order flow serve both sides of the business.
- 04Markets and multi-storeSelling into new countries with Markets, local currencies and domains, or a separate expansion store where the catalogue or the team differs. We set up the stores, sync the theme and wire the shared integrations.
- 05Launchpad and FlowScheduled drops with Launchpad, with the theme, prices and inventory switching at the minute you set. Flow automations for tagging, fraud holds, restock alerts and the manual jobs your team repeats every week.
- 06ERP, 3PL and CRM integrationsOrders, inventory, customers and fulfilment status moving between Shopify Plus and the systems you already run. We have built these with ERPs, fulfilment systems and CRMs, with a log you can read when a sync fails.
PIXLIP
Four steps, and you can see every one of them
- 01A 30-minute callWe look through your store before the call and come with questions about what is slowing it down, so the time goes on your store and not on a pitch.
- 02A written scope with a fixed priceWhat we will build, what it costs and when it starts, on one page. Most projects start within 3–5 business days of you saying yes.
- 03Build in the openA shared Slack channel, a staging store you can click through at any point, an update at least every 48 hours and a call every week.
- 04Launch, then stay closeWe launch, watch the first weeks of data and fix what the data says to fix. Most clients keep us on for the next thing.
Founders and managers we worked with, in their own words.


Grumspot's team successfully revamped the SEO ReRank app. The team made sure I'm kept up to date on the progress of the project at all times and were very quick to adapt any requested changes.



Very competent team who do the work diligently and professionally while still maintainting an agile approach to accomodating changing business needs.



We're impressed with their professionalism and quick reaction times to issues and requests.



We loved working with Grumspot! They created a custom app for our Shopify checkout that fixed our address issue perfectly. Their quick and effective solution made a big difference for us. Highly recommend!

Grumspot were exceptionally great to work with. They always offered their best advice and were readily available. I thoroughly enjoyed working with them and highly recommend them.

It has been a pleasure working with Grumspot, and we are extremely satisfied with their services. Their communication was exceptional, and their meticulous attention to detail in data gathering stood out. Grumspot consistently exceeded expectations in their deliverables, completing the project on time and providing unwavering support for any questions our team had. We highly recommend Grumspot for any Shopify Plus projects and look forward to collaborating with them again in the future.

Working with Grumspot was a pleasure. They were highly professional in their communications and the final work product, even under a tight deadline.

Questions about Shopify Plus
Tell us what your store needs.
Send a few lines about the store and what is slowing it down. We read it, look at the store, and come back with questions and a price range.

