How to Build an App Like Shopify: Custom Commerce Platform Guide (2026)

A medical equipment distributor in Texas sells to hospitals under GPO contracts. Each hospital has a negotiated price list, a separate net-60 payment term, and a compliance requirement that their purchasing officer approves every order before it ships. Shopify has none of that. A restaurant supply company in Chicago sells to 400 independent restaurants. Each account has a custom price tier, a credit limit, and prefers to order on net-30 terms by PO, not credit card. Shopify has none of that either.

This is the problem that leads founders to ask how to build an app like Shopify. Not because they want to compete with a $100 billion platform. Because their industry has a purchasing workflow that Shopify's consumer-first model simply cannot support.

The cost to build a platform like Shopify depends on scope. Here is the honest range:

The drag-and-drop storefront builder is the single largest scope variable. It is a visual editor, which is a separate product in itself. Do not put it in V1.

According to Shopify's 2024 Annual Report, the platform processed $273 billion in GMV. But Shopify serves primarily the consumer retail market. Verticals with compliance requirements, B2B pricing complexity, or domain-specific workflows are where custom platforms find defensible ground.

Who actually builds an app like Shopify

Four types of companies build vertical commerce platforms instead of directing merchants to Shopify:

B2B industrial and wholesale operators. Restaurant supply companies, medical equipment distributors, and construction material suppliers all sell to businesses, not consumers. Their buyers need net-30 or net-60 payment terms, tiered pricing by volume, company-level accounts with multiple authorized buyers, and PO-based checkout, not credit card checkout. Shopify's checkout is built for one buyer, one card, one transaction. A B2B industrial commerce platform needs the opposite of that.

Regulated and restricted goods operators. CBD, pharmaceutical supplies, licensed firearms accessories, alcohol, and adult products all sit in Shopify's restricted categories. Shopify can and does suspend merchant accounts selling in these categories, sometimes without warning. A vertical platform for licensed distributors in one of these categories lets you build KYC into the onboarding flow, enforce age verification at checkout, and give merchants a stable home with no policy risk.

Domain-specific workflow businesses. Event ticketing platforms (seat selection, barcode scanning, transfer rules), food service ordering platforms (time-slot routing to kitchen displays, driver dispatch), and equipment rental platforms (availability calendars, damage deposits, scheduled returns) need commerce infrastructure woven into a domain workflow. Shopify apps can approximate parts of this. The seams show immediately once merchants try to use them at scale.

Geographic operators in underserved markets. Southeast Asia, parts of Latin America, and Middle Eastern markets have local payment methods, local tax structures, and local-language requirements that Shopify's infrastructure does not support cleanly. A regional SaaS ecommerce platform built around local payment rails and local regulatory requirements gives merchants in those markets options that Shopify cannot.

V1, V2, V3 feature breakdown

Most vertical commerce platforms scope too much for V1 and end up in an 18-month build that validates nothing. Here is a disciplined breakdown by phase:

V1: Launch (20-30 weeks, $80K-$160K)

Merchant signup and onboarding is the prerequisite for everything. Account creation, Stripe Connect setup, and domain connection. The Stripe Connect KYC onboarding flow alone takes 2-3 weeks to build and test correctly. Do not underestimate it.

Product catalog covers products, variants, images, pricing, and basic inventory. Digital products need a separate download delivery path. Service products need to suppress shipping. Keep the data model flexible because your merchants' catalogs will have edge cases you did not anticipate.

Templated storefront: 3-5 configurable themes, not drag-and-drop. Merchants configure colors, fonts, logo, and layout. This covers what 80% of merchants need at launch and costs a fraction of a visual editor.

Checkout: shipping address collection, method selection with live carrier rates, payment, and order confirmation email. According to Baymard Institute's 2024 cart abandonment research, average documented cart abandonment is 70.19%. A checkout that adds friction on top of that baseline costs your merchants revenue immediately. Build it carefully.

Order management: order list, order detail, fulfillment status, and refund initiation. Merchants need to see and act on orders. That is the minimum viable daily-use surface.

Basic analytics: GMV per day, orders per day, top products. Not a full analytics suite. Enough for a merchant to know if their store is working.

V2: Growth ($55K-$90K additional, build after validating V1)

Drag-and-drop storefront builder. Most requested feature, most expensive to build. A block-based visual editor is $55K-$90K. Launch with configurable templates first. Add the builder after you have real feedback from merchants about what they actually want to change.

Discount and promotion engine: percentage discounts, fixed-amount discounts, buy-X-get-Y, free shipping thresholds. Merchants will request this within 60 days of launch.

Abandoned cart recovery. Automatic email sequence triggered on abandoned checkouts. Direct revenue impact for merchants. Add this once the core checkout flow is proven and stable.

Customer accounts and loyalty. Repeat purchase flows, order history, wishlist, saved addresses. Lower priority than getting first purchases working correctly.

V3: Scale ($80K-$150K additional, relevant above 500 merchants or $50M platform GMV)

App marketplace API. Open your API to third-party developers. This requires a stable, documented API and developer tooling. Do not open to external developers until you are no longer making breaking API changes.

POS integration. If your vertical has brick-and-mortar merchants, this extends their online store into their physical location.

B2B wholesale module: net-30 terms, company-level accounts, quote workflows, volume pricing. Significant scope, but it opens the door to higher-value merchants in the industrial and medical equipment space.

International expansion: multi-currency, translated storefronts, local payment methods. Each market adds operational overhead. Expand to a second market only after the first is profitable.

White-label Shopify clone vs. custom build

This is the decision most founders get wrong. Before scoping a custom build, they look at WooCommerce white-label, Magento, and BigCommerce reseller programs. Here is what each actually costs and where each breaks.

WooCommerce white-label

WooCommerce is a WordPress plugin for single stores. Turning it into a multi-merchant SaaS requires bolting on a plugin like Dokan or WC Vendors, which adds a marketplace layer on top. Setup cost: $5K-$15K for a developer to configure, plus $500-$2,000/year in plugin licenses.

It breaks in four specific ways:

First, no real multi-tenancy. Dokan stores all merchants in one WordPress installation. There is no data isolation between merchants at the database level. A misconfigured plugin, a rogue query, or a plugin update can expose one merchant's order data to another.

Second, no platform fee collection. Stripe Connect exists in WooCommerce only through a plugin layer that was bolted on after the fact. The payment splitting logic is fragile and breaks when plugin versions conflict. You cannot reliably collect a percentage of every transaction as a platform operator fee.

Third, maintenance dependency hell. WooCommerce, WordPress, Dokan, WC Vendors, and your theme all update on independent schedules. A WooCommerce major version update breaks Dokan. A Dokan update breaks a payment plugin. You spend a week every quarter testing and fixing update conflicts instead of shipping features.

Fourth, no merchant-level customization without per-merchant overrides. Every merchant shares the same theme and configuration layer. Giving one merchant a different checkout flow or a different product type requires workarounds that accumulate into unmaintainable technical debt.

Magento (Adobe Commerce)

Magento handles large catalogs and complex B2B pricing. It is genuinely powerful for single-tenant enterprise deployments. But it was not designed as a multi-merchant SaaS platform. Licensing costs: Adobe Commerce Cloud runs $22,000-$125,000 per year depending on GMV tier. On-premise open source is free but requires a $50K-$150K implementation from a certified Magento agency.

The specific failure points for a Shopify-like use case: no native platform fee collection (you are building a revenue model on top of single-store infrastructure), no tenant isolation by design (Magento's data model assumes one merchant), and the admin interface is built for large enterprise buyers managing one catalog, not for hundreds of small merchants managing their own stores. Merchants find Magento's admin overwhelming. Churn follows.

BigCommerce reseller program

BigCommerce offers a Partner Program that lets agencies white-label BigCommerce stores and resell them to merchants. It is the closest of the three to a real multi-merchant architecture because BigCommerce is a hosted SaaS platform.

The problem: you do not own the platform. BigCommerce owns the infrastructure, the checkout, and the pricing. Your merchants are BigCommerce merchants who happen to see your brand in the UI. When BigCommerce raises prices, you absorb it or pass it on. When BigCommerce changes the checkout flow, your merchants experience the change. You cannot add a compliance layer for regulated goods because you do not control the onboarding flow. You cannot collect a custom platform fee on transactions because BigCommerce collects the payment.

Reseller monthly costs: $400-$2,000/month per merchant store depending on the plan, which you are paying wholesale and marking up. At 50 merchants, you are paying BigCommerce $20,000-$100,000/month in platform fees before your own margin.

The honest comparison

The white-label options look cheaper at the start. They stop looking cheaper when you hit 50 merchants and cannot collect a platform fee, cannot control compliance, and cannot give merchants the workflow they actually need.

"Most of the interesting commerce infrastructure being built today is happening in the verticals Shopify ignores: regulated goods, complex B2B pricing, specific geographic markets, and niche business models. That is where platform builders find defensible ground."

• Harley Finkelstein, President of Shopify (Shopify Unite, 2023)

Build vs. buy decision

Keep directing merchants to Shopify when: they sell standard physical or digital products, their business model is straightforward, they are in a geography Shopify serves well, and they can use the 10,000-app ecosystem Shopify has built over 15 years. Shopify's checkout conversion rates are difficult to match from scratch. If your merchants can use it, they should.

Keep using Shopify when:

• Your merchants sell consumer products with standard SKUs (clothing, electronics, home goods, books).

• Your merchants are small (less than $500K annual GMV) and do not need a workflow Shopify cannot handle.

• You are testing market demand before committing to a platform build.

Build custom when:

Your vertical has compliance or data requirements Shopify cannot guarantee. Shopify's acceptable use policy restricts specific regulated product categories. A custom platform gives merchants in those categories a stable home with no policy risk.

Your business model requires transaction economics Shopify does not support. Wholesale platforms need net-30 credit, quote workflows, and tiered pricing. Rental platforms need deposit holds, availability calendars, and damage fee collection. Auction platforms need bid management and reserve prices.

Your merchants need a workflow inseparable from the commerce layer. Ticketing platforms need seat selection wired into inventory. Food platforms need order routing to kitchen displays wired into checkout. These are platform design problems, not Shopify app problems.

Your geography requires payment or language support Shopify cannot provide. Regional markets with local payment methods, local tax structures, and local-language merchant support are a real reason to build.

The specific thresholds that make custom the clear choice:

You have 100+ potential merchants in a specific vertical. That is enough density to justify the platform investment and build a moat against Shopify entering your niche.

Your average merchant GMV exceeds $1M per year. At 1% platform fee on $1M GMV, you earn $10,000 per merchant per year. At 100 merchants, that is $1M in annual platform revenue from transaction fees alone, before subscription fees.

Your merchant workflow requires more than 3 Shopify apps working together. The integration tax on stringing together multiple apps is real. Merchants pay $300-$800/month in app fees, deal with data sync failures between apps, and cannot get support when an issue spans multiple vendors. A unified vertical platform eliminates all of that.

According to a 2023 McKinsey study on platform economics, vertical SaaS platforms targeting a specific industry with purpose-built workflows generate 2-3 times the customer lifetime value of horizontal platforms trying to serve all markets.

Where ecommerce platform builds go wrong

The multi-tenancy retrofit. Most teams start with row-level isolation (all merchants in shared tables, every row tagged with a merchant ID, all queries filtered by that ID). It is the right starting architecture. It scales to tens of thousands of merchants without changes.

The failure mode: two enterprise prospects surface six weeks into the build with HIPAA or SOC2 requirements that need database-level isolation (each merchant gets their own database). Retrofitting the data layer mid-build costs 4-6 weeks and breaks everything that was already built. Make the isolation decision before writing the first query. If you have any chance of serving compliance-heavy merchants in the medical equipment or regulated goods space, plan for it from the start.

Scoping the drag-and-drop builder in V1. This is the most common reason vertical commerce platform builds run over budget and miss their launch date. Founders want to give merchants full design control from day one. The visual editor turns into a 6-month project that delays every other feature. Launch with 3-5 configurable templates. Merchants can choose a theme, set colors and fonts, upload a logo, and arrange a homepage. That covers 80% of what they need. Add the visual editor in V2 after you know what merchants actually want to customize.

How RaftLabs approaches ecommerce platform builds

We have built multi-tenant SaaS platforms and marketplace products for B2B industrial operators, regulated goods companies, and regional commerce operators. The pattern we follow on every engagement: first, define the merchant workflow before writing code. The product catalog structure, the checkout flow, and the payment architecture all depend on understanding exactly what your merchants do daily and where the current tool (often spreadsheets, QuickBooks, or a patched Shopify setup) breaks down.

Second, we scope V1 to validate one core merchant workflow end-to-end. Not every feature. Not the drag-and-drop builder. The minimum surface that lets a real merchant sign up, list products, and get paid. That is what 20-30 weeks buys. Once real merchants are using V1, the V2 prioritization becomes obvious.

The engagements we do most often in this category are B2B wholesale platforms with net-30 credit and quote workflows, compliance-specific commerce for regulated categories, and regional platforms in markets where Shopify's payment support is inadequate.

If you are evaluating whether a custom build makes sense for your vertical and you have 50+ potential merchants in a specific industry, here is what the first 90 days with RaftLabs looks like: a two-week scoping engagement to document your merchant workflow, define your data model, and produce a fixed-scope V1 estimate; followed by a phased build starting with merchant onboarding and the core product catalog. You get a working merchant portal before week 10. Request a 30-minute scoping call.