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Shoppers stopped buying in one place. Someone finds a product on Instagram, checks the price on Google, and buys it on Amazon or your own site — 73% of shoppers use several channels in a single purchase journey.
Selling in more places is the easy half. The half nobody warns you about is what happens behind them: counts that stop agreeing, orders spread across four admin panels, and listings that need editing one at a time.
Below: which channels are worth adding, what actually breaks when you do, and how to assemble the tooling that holds them together.
What the term means
“Multichannel ecommerce solutions” is a category name rather than a product. In practice it covers three jobs that are often sold separately: getting listings onto each channel, keeping one stock pool truthful across all of them, and collecting the resulting orders somewhere you can fulfil from.
Some tools do all three shallowly, some do one properly. Working out which you need is cheaper than buying the biggest thing on the shortlist. We do the second and third across 11 channels and don’t attempt the first.
Where to sell
Channels aren’t interchangeable, and the right second one depends on what you sell, not on which has the most buyers. The last column is the part most round-ups leave out: whether a syncing tool can hold that channel’s stock for you at all.
| Channel | Best for | What it gives you | QuickSync connects it |
|---|---|---|---|
| Shopify | Your own storefront | Control of brand, checkout and data | Yes |
| Amazon | Reach | The largest built-in audience, on Amazon’s terms | Yes |
| Etsy | Handmade and niche | Buyers already looking for that category | Yes |
| eBay | Used, spares and auction | International buyers and long-tail demand | Yes |
| TikTok Shop | Social discovery | Demand you didn’t have to buy | Yes |
| WooCommerce | WordPress sites | Ownership, at the cost of maintenance | Yes |
| Squarespace | Design-led small catalogues | Fast to launch, limited to extend | Yes |
| Square / Clover / Lightspeed | Selling in person | A till whose stock can match the website | Yes |
| Walmart Marketplace | US retail reach | High trust, strict performance rules | No |
| Google Shopping | Discovery, not a shop | Visibility rather than a checkout | No |
| Instagram Shop | Social browsing | Sales inside the feed | No |
A till counts as a channel too. A shop floor that sells the last unit is no different from a marketplace doing it, and it’s the case sellers most often forget to plan for.
What breaks as you add them
Every channel you add multiplies the same three failures instead of adding new ones.
- The counts disagree. One shop sells, the rest keep advertising stock you no longer have. Multichannel inventory management covers how quickly each channel can be corrected.
- The orders scatter. Fulfilment means opening every admin panel in turn, and marketplaces measure how long you took. Multichannel order management sets out which channels can receive an order and which can only hand one out.
- The listings drift. A price change made in one place is a to-do list everywhere else, and the copies diverge quietly.
The first two are worth solving before you add channel three. Preventing overselling gets harder in proportion to how many places can sell the same unit at once.
Picking your stack
Match the tool to the job you actually have. Buying the largest platform on the shortlist is the common and expensive mistake.
| If your problem is | What you need | What it looks like |
|---|---|---|
| Two to eight shops whose counts disagree | A syncing tool | Tens of pounds a month, live the same day |
| Getting one catalogue listed on new marketplaces | A listing tool | Per-listing or per-channel pricing |
| Purchase orders, warehouses and accounts in one place | An ERP | Hundreds a month and an implementation project |
| Shoppers crossing between online and a shop floor | An omnichannel retail platform | POS-led, priced per till |
We sit in the first row. If you’re in the third or fourth, say so early and we’ll tell you the same thing. Our comparison pages put the same questions to named alternatives, and marketplace integration goes into the connecting work in more detail.
The names you’ll be comparing
Search for the best software here and you get the same dozen names in a different order each time, sorted by who paid for the placement rather than by what they do. Sorted by job instead, the shortlist is shorter than it looks.
- Stock syncing between shops. Trunk, Stock Sync, Syncio and QuickSync live here. Cheapest to run, quickest to prove, and the right answer more often than the market admits.
- Listing and marketplace management. Sellbrite and Linnworks sit closer to this, which is a different buy from keeping counts in step.
- Retail and till-led. Shopventory and SKU IQ come at it from the counter, not from the website.
- Full operations platforms. Cin7, Katana, Zoho Inventory and the ERPs. Buy one when stock ordering and warehouses are the real job, not when two shops disagree about a number.
Each linked page above asks the same questions of that tool and of us, including the ones we lose. How these tools price themselves is worth a read first, because per-order and per-SKU billing diverge sharply once you grow.
Where we don’t fit
- We connect 11 channels. Walmart Marketplace, Google Shopping and Instagram Shop aren’t among them, whatever a table elsewhere on the internet says.
- Eight shops per plan. Past that, you want a larger platform.
- eBay, Etsy and Squarespace stock is checked every 2 minutes, and Etsy orders every 5. Etsy publishes no webhook, so this is true of every tool in the market.
- No purchase orders, no bin locations, no demand forecasting, and we don’t create listings on your behalf.
Getting started
Give every product the same SKU in each shop, connect two of them, and sell one thing. The matching runs on SKUs, so that single piece of preparation decides how well the rest goes.
Across our sellers we write about 67,000 stock corrections a day, measured over the 30 days to 10 August 2026. You’re meant to stop noticing them by the second week.
More reading: multichannel selling for the commercial case, omnichannel inventory management if you also trade from a shop floor, and product syncing for what copies between shops.