Ecommerce Infrastructure · Perth, WA

One stack.
Online, in-store,
in sync.

Retail, wholesale, and the systems behind them.

Custom commerce infrastructure for Australian retailers and wholesalers — without the agency overhead. We build, integrate, and support your entire storefront, point-of-sale, and back-office systems as one connected platform. Built in Perth, supported from Perth.

Book an on-site consult See how it works
Online storefront In-Store point-of-sale Back Office inventory + accounting

The Mainstack Platform

One platform. Every part of your retail operation.

Most Australian retailers run their business across five different tools — a website builder, a POS, a spreadsheet, an accounting app, and a marketplace dashboard. Mainstack replaces that stack with one connected platform that talks to itself.

Core
Mainstack Platform
Powered by Adobe Commerce · Online Retail + B2B
Mainstack POS
Linkly
Mainstack Sync
MYOBXero
Mainstack Stock
Multi-warehouse · dispatch tracking
Mainstack Channels
eBayamazon
Customer Engage
☺Klaviyo
Shipping
ShippitAustralia PostStarTrack

Everything synced. Nothing manual. Built on fully customisable commerce architecture and tailored to your business.

How it works

Start with the foundation. Add what you need, when you need it.

01

Foundation

We build your production-ready storefront. Theme, catalogue, payments, shipping, SEO, training. Launched in 4–6 weeks.

02

Modules

Plug in the modules your business needs: in-store register, multi-location inventory, accounting sync, B2B accounts, marketplace channels. Each module connects natively to your Foundation.

03

Ongoing support

We're here when you need us — security patches, updates and new features, billed by the hour, never locked behind a mandatory subscription. As your business grows, your stack grows with it.

Start here

Mainstack Foundation

The commerce platform you own — not a rented SaaS account.

Foundation is the commerce platform every Mainstack build runs on. We start by deploying a customisable Adobe Commerce core on infrastructure you own. A clean storefront and theme are table stakes — what sets Foundation apart is everything you can do once you're off a capped, rented SaaS account.

Your platform, not a rented account

No artificial limits — no caps on admin users, products or domains — and no per-feature subscription fees. Your code stays private, and your order and customer data stays with you, never held on a third-party platform. We handle the technical foundation: cloud server provisioning, security hardening and environment configuration.

Products modelled to your business

We shape the product and inventory model around how you actually sell. Configurable bundles let a customer build a product from parts, with options driven by live stock — a PC builder picks CPU, motherboard and components, and only sees what's in stock. Whatever your purchase logic, we build it into the catalogue and cart.

B2B that replaces your trade catalogue

From one backend, run multiple storefronts — different domains, different designs, different pricing — selling the same products. Wholesale and retail price lists, customer-specific pricing and account terms, all from one source of truth. A full replacement for the traditional B2B catalogue and separate trade portal.

Tired of subscription pricing tricks? So are we.

When the build is done, the code is yours — use it and modify it, for as long as you like, with no limits. (You just can't on-sell it.)

Need new custom features down the track? We bill by the hour for that work — and nothing else. No surprise subscriptions, no per-seat creep, and no fee for simply staying switched on.

Book an on-site consult

Add what you need

Modules that connect natively to your Foundation.

Each module is built to work standalone or as part of your stack. Start with what you need today, add more as your business grows.

Mainstack POS

Turn your stores into connected retail.

Run your physical stores on the same platform as your online store. Mainstack POS connects to Linkly-compatible payment terminals (CBA, Westpac, NAB and more), so you process transactions at bank-direct rates — not the 1.5–2.6% you'd hand a third-party processor.

  • Bank-direct payment processing via Linkly + PinPad
  • Real-time inventory sync between online and in-store
  • Low ~0.5% card fees on both online and in-store sales

From $2,800 + no running fees

Learn more

Mainstack Stock

Multi-location inventory, one source of truth.

For retailers running multiple stores, warehouses, or fulfilment locations. Mainstack Stock keeps inventory synchronised across every location — including stock transfers, low-stock alerts, and automated reorder rules. Your team always knows what's where.

  • Multi-location stock pools with real-time sync
  • Cross-store visibility (store A sees store B's stock)
  • Low-stock alerts and reorder automation

From $1,500 + no running fees

Learn more

Mainstack Sync

Your books, always up to date.

Two-way synchronisation with your accounting platform. Mainstack Sync pushes sales, refunds, and customer data into MYOB or Xero automatically — no end-of-month reconciliation marathons, no manual data entry.

  • Two-way sync with MYOB or Xero
  • Customer, sales, and refund mapping
  • Daily automated reconciliation

From $800 + no running fees

Learn more

Mainstack B2B

Wholesale built into your retail platform.

Run retail and wholesale from the same backend — while giving each customer a completely different front end, right down to their own domain. Mainstack B2B adds company accounts with multiple buyers, custom pricing tiers, quote workflows, and credit limits. Our wholesale clients run entire trade networks through setups like this.

  • Company accounts with multiple buyers and roles
  • Custom pricing per company or buyer group
  • Quote-to-order workflow with approval chains

From $2,000 + no running fees

Learn more

Every module is live and running with Australian businesses. Talk to us about scoping the right combination for yours.

Why Mainstack

For Australian businesses that have outgrown off-the-shelf platforms.

One core. Every channel.

Your online store, retail counter and wholesale accounts run on a single backend — one product catalogue, one inventory pool, one customer database. Update something once and it's live everywhere: no double entry, no end-of-day reconciliation, no third-party sync subscription, and no selling stock you don't have.

Connected to your bank, not a middleman.

Card payments settle through your own bank's Linkly-compatible EFTPOS terminal at bank-direct rates — around 0.5%, not the 1.5–2.6% a third-party processor takes. And banking with an Australian institution means disputes follow established local processes with real merchant protections — not a global platform's chargeback rules and ticket queue.

A Perth team, on-site and in your corner.

We're Perth-based and in your timezone — not offshore support behind a ticket queue. We build the system around your business, come to you for an on-site consultation, and when you have a question you talk directly to the people who built your stack.

Real Perth local businesses

What we've built.

A snapshot of recent work — just a couple of the systems we've shipped lately.

Wholesale distribution · Welshpool, WA

Their entire trade network, one unified portal.

A Western Australian wholesale distributor needed to consolidate dozens of trade customers onto a single platform — each with their own pricing tiers, account approvals, and credit terms. Mainstack delivered a custom B2B portal that handles the full quote-to-order flow with account-level controls.

Modules used: Foundation, B2B, Sync

Multi-store retail · Perth & Sydney

Two stores, one inventory, bank-direct payments.

A multi-location retailer running two storefronts — one in Perth, one in Sydney — needed synchronised inventory across both physical sites and their online channel — plus bank-direct POS processing to escape high third-party transaction fees. The result: one connected stack with lower fees, where every sale, order, customer, and refund across both stores and the online channel flows into MYOB in real time. No manual exports, no end-of-day reconciliation — just a leaner workflow, sharper efficiency, and inventory they can finally trust.

Modules used: Foundation, POS, Sync, Stock

Want details? We can share specifics under NDA during your consultation.

Local team

Built in Perth. Supported from Perth.

Mainstack is a Perth-based team you can actually reach, in your timezone. No offshore ticketing systems. No account managers who don't know your business. When you have a question — about a payment that didn't reconcile, a stock-take that looks off, or a new feature you want to scope — you talk directly to the person who built your stack.

We work with Australian retailers and wholesalers who need infrastructure that fits how they actually run their business. If that sounds like you, let's talk.

Ready to talk?

Book a free on-site consultation.

Tell us about your current setup — your platform, your stores, your pain points. We'll come to you, sit down in person, and show you exactly what's costing you money and what a Mainstack stack would look like for your business. No pressure, no sales pitch.

Or email us directly: [email protected]