How to Choose the Right UK Marketplace for Your Business

This Experts Guide to UK Marketplaces is aimed at SME business owners, founders, brand owners and product distributors who want to understand which online marketplaces are right for their business. With at least 16 major UK marketplaces now competing for sellers, choosing where to invest your time and money is more important than ever.

Following on from some of my other Experts Guides to Conversion Rate Optimisation (CRO) and Direct to Consumer (D2C) Strategy, this further guide is an in-depth look at how to select the right marketplace for your business, including a decision tree and an interactive form to generate a personalised shortlist.

Guide to UK Marketplace Selection

The UK marketplace landscape has changed beyond recognition in the last five years. What was once a two-horse race between Amazon and eBay is now a crowded field of 16 or more meaningful platforms, ranging from generalist consumer marketplaces to retail-owned platforms, social commerce and B2B wholesale marketplaces.

For most SME companies, the question is no longer whether to sell on marketplaces but which marketplaces, in what sequence, and how do they sit alongside owned D2C channels. Get this right and you can scale revenue significantly without the customer acquisition costs of running a standalone eCommerce store. Get it wrong and you can burn cash chasing volume on a platform that was never going to work for your category.

The best marketplace strategy is not the one with the most platforms, it’s the one with the best sequence of platforms for your specific business.

This free UK Marketplaces Experts Guide is aimed at SME companies but can be used by anyone evaluating the marketplace opportunity. Welcome to the art of marketplace selection.

What is a Marketplace & Why Does Selection Matter?

An online marketplace is a third-party platform where multiple sellers list products to consumers (B2C) or to businesses (B2B). Unlike running your own eCommerce store, the platform owns the traffic, the checkout and usually the customer relationship. You bring the product, the listings, and (usually) the fulfilment.

The commercial value of marketplaces is straightforward; immediate access to a large, ready-to-buy audience without having to build the audience yourself. The trade-off is fees, fulfilment constraints, competitive dynamics and a degree of platform dependency that you would not have running your own store.

Marketplaces give you traffic. They don’t give you a business. The difference matters.

Why Marketplace Selection is Critical

Every marketplace has a different fee structure, a different audience, a different fulfilment model and a different competitive landscape. A product that performs brilliantly on Temu may flatline on Amazon. A brand that sells well on eBay may be gated out of Boots. Selecting the right marketplace (or marketplaces) is the single biggest commercial decision in a marketplace strategy.

Get the sequence right and each platform reinforces the next. Stock turns faster, listings improve through accumulated reviews, and the operation builds the muscle memory to handle increasing volume. Get it wrong and you end up spread thin across multiple platforms, none of which is performing well enough to justify the management overhead.

UK Marketplaces Executive Summary

This is a quick executive summary to explain the what, why, when, who and how of UK marketplace selection. It’s intended to be a one minute read for the CEO, COO and C-suite, with more detailed answers in the following sections.

What is a Marketplace?

A marketplace is a third-party online platform where sellers list products to a ready-made audience. The platform owns the traffic and the checkout. You bring the product. UK marketplaces include consumer platforms (Amazon, eBay, Temu, OnBuy), retail-owned platforms (Argos, Tesco, Boots, The Range, B&Q, Very, Debenhams, Dunelm), social commerce (TikTok Shop), specialist platforms (Wayfair, ManoMano) and B2B wholesale platforms (Faire).

Marketplaces are not all equal and platforms can be categorised into consumer shopping, retail-owned, social commerce, specialist and B2B wholesale.

Why Sell on a Marketplace?

Marketplaces give you immediate access to a large, ready-to-buy audience without having to acquire that audience yourself. For most SME companies, marketplace selling can deliver scale faster than any other digital channel.

When to Start Selling on Marketplaces?

Now, but selectively. The fight for online dominance is greater than ever before. As a small SME company, it is hard to compete with companies with large marketing budgets so marketplaces level the playing field. However, before you rush to onboard onto every available platform, first ensure you have the operational capacity, the margin headroom, and the brand authorisation to do so profitably.

Who Should Be Selling on Marketplaces?

Any SME or mid-market business selling physical products to UK consumers or businesses should be evaluating marketplaces. The question is not if but which.

How to Choose the Right Marketplace?

This article is aimed at this specific question. There’s no single right answer, it depends on your category, your margin, your fulfilment capability and your strategic priorities. The decision tree and interactive form below will help you narrow down the right shortlist for your business.

Marketplace Strategy Support

If you would like help selecting, sequencing or launching on UK marketplaces, please get in contact. I offer retail consumer consultancy and advisory services for SME companies in consumer-facing environments, especially eCommerce, D2C and UK marketplaces.

The Seven Criteria That Actually Matter to Select a Marketplace

Before we look at individual marketplaces or run the decision tree, let’s set out the seven criteria that should drive any marketplace selection decision. Most generic best marketplace articles list platforms and fees. That’s not enough. The criteria below are the ones that will determine whether a marketplace works for your specific business.

1. Product-Platform Fit

The single most important criterion. Does the platform’s audience actually buy what you sell? Amazon and eBay are generalist, so almost any product has some fit. Wayfair is furniture and home only. ManoMano is DIY and garden. The Range skews toward home, leisure and household. Boots is health, beauty and pharmacy. Selling premium organic skincare on Temu will not work, no matter how good the listings are. Selling cleaning chemicals on Wayfair is similarly pointless.

2. Fee Structure & Total Cost of Selling

The total cost of selling, not just the headline commission rate. This includes;

1. Referral or Category Fees: a percentage of the sale price, typically 8-15%
2. Fulfilment Fees: if you use the platform’s logistics (Amazon FBA, Fulfilled by TikTok)
3. Payment Processing Fees: often bundled into the commission, sometimes separate
4. Monthly Subscription or Store Fees: applies on some platforms (Amazon Professional, B&Q, OnBuy)
5. Promotional Levies: discounting requirements, sponsored listings, ad spend

The headline fee is rarely the full picture. A platform with a 15% referral fee and free fulfilment may be cheaper than one with a 9% fee plus a fulfilment charge. Afterall, retail is detail.

3. Fulfilment Compatibility

Does the platform require you to use their fulfilment, or can you ship from your own warehouse? For most SME businesses, the answer here drives the decision more than fees do. Amazon FBA requires sending stock to an Amazon warehouse, tying up working capital and removing flexibility. eBay, OnBuy and most retail-owned marketplaces let you ship from your own warehouse. Temu and TikTok Shop have hybrid models. Wayfair operates a drop-ship model where they buy at wholesale and sell at their own retail price.

4. Buy Box and Competitive Dynamics

On platforms with multiple sellers listing the same product (Amazon, eBay), visibility is determined by an algorithm that factors in price, seller performance and fulfilment method. If you are not the lowest price or do not meet the performance thresholds, you lose visibility regardless of listing quality. Other platforms (OnBuy, The Range) operate single-seller models where there is no Buy Box competition.

The platforms with Buy Box competition are a race to the bottom on price. The platforms without it are a race to product quality and listing optimisation.

5. Brand Authorisation & Gating

Some platforms restrict who can sell certain brands. Amazon in particular gates many household and FMCG brands, requiring invoices proving authorised supply before allowing listings. Boots applies similar restrictions in health and beauty. If your business depends on selling branded products, you must confirm authorisation before assuming the platform is open to you.

6. Customer Ownership & Lifetime Value

On Amazon, the customer belongs to Amazon. You cannot contact them, market to them, or build a relationship with them. On your own D2C site you own everything. eBay and the retail-owned platforms sit somewhere in between. This matters for the long-term value of each customer; if you cannot build a relationship, the lifetime value of an order is limited to that single transaction.

7. Platform Risk & Concentration Exposure

How much control does the platform have over your business? Fee changes, algorithm changes that wipe out visibility overnight, account suspension risk, and platform stability concerns. The more revenue you concentrate on a single platform, the greater your exposure to any of these risks. A diversified marketplace strategy is partly about growth and partly about protection.

“Single-platform dependency is the silent risk in most marketplace businesses. By the time you realise you’re exposed, the damage is already done.” – Mark Taylor (Retail Solutions)

Interactive Decision Tree : Find Your Starting Platform

Before we look at the full landscape, let’s narrow down your starting platform with a short decision tree. Answer the questions below and you’ll arrive at a recommended shortlist of 2-3 marketplaces that suit your business profile.

The UK Marketplace Landscape

The UK has 16 marketplaces of meaningful scale, grouped by type. The list below is not exhaustive but it covers every platform an SME should evaluate.

Generalist Consumer Marketplaces

Amazon UK: the dominant marketplace with roughly 350 million monthly UK visitors and around 68% market share. Referral fees of 8-15% by category. FBA available for hands-off fulfilment but adds cost. Brand gating affects many household and FMCG lines.

eBay UK: the second-largest UK marketplace with around 115 million monthly visitors. Commission of 10.9% plus VAT for most business sellers including payment processing. No FBA-equivalent so seller fulfils direct.

Temu UK: the fast-growing challenger with around 60 million monthly UK visitors. Currently operates a consignment-style model with low effective fees in promotional periods. Highly price-sensitive audience suited to volume FMCG.

OnBuy: UK-founded marketplace with around 10 million monthly visitors. Fair fee model (5-15% commission depending on category), no Buy Box competition with the platform, low subscription fee. Strong choice as a second marketplace for FMCG and household sellers.

Retail-Owned Marketplaces

Argos: owned by Sainsbury’s, third-largest UK eCommerce site. Strong general merchandise audience. Currently invite-only for marketplace sellers.

Tesco Marketplace: new marketplace from the UK’s largest grocer, opening to selected non-grocery and adjacent categories. Currently invite-only with limited transparency on fees.

Boots: established pharmacy retailer with growing marketplace. Strong for health, beauty and personal care. Application-based with selective onboarding.

The Range: rapidly growing home and lifestyle marketplace with around 15 million monthly visitors. Commission of 11-15%, no listing fees, no monthly subscription. Curated seller base (around 1,100 sellers) and an exclusive listing model.

B&Q: DIY-focused marketplace, around 38% of B&Q’s online sales now come through the marketplace. £39 monthly subscription plus 7-15% commission. Application required.

Very: fashion, home and electronics marketplace within The Very Group. Application-based.

Debenhams: now online-only under Boohoo. Fashion and beauty focus with declining relevance versus pre-acquisition era.

Dunelm: home furnishings specialist with established UK position. Marketplace newer, application-based.

Social Commerce

TikTok Shop UK: around 20 million UK users on the TikTok app. Commission of 9% on GMV plus a £0.50 self-ship fee per order. Algorithm-driven discovery via content. Strong for beauty, household impulse lines and lifestyle products.

Specialist Platforms

Wayfair UK: home and furniture specialist with around 16 million monthly visitors. Operates a wholesale-buying model rather than a traditional marketplace; Wayfair buys from you at an agreed wholesale price and sets the retail price.

ManoMano UK: DIY and garden specialist with around 1 million monthly UK visitors. UK is the platform’s fastest-growing market. Commission negotiated individually.

B2B Wholesale Marketplaces

Faire: the largest B2B wholesale marketplace globally. Connects brands and distributors with independent retailers. Commission of 15% on new retailer orders plus a one-time £10 per new customer fee, and 0% on Faire Direct orders from retailers you brought to the platform. Free to join.

Consultancy & Advisory Services

The decision tree and form above will help you build a starting shortlist, but every business has nuances that a generic tool cannot capture. I offer consultancy and advisory services for companies in consumer-facing environments, especially eCommerce, D2C and UK marketplaces. If you would like a tailored marketplace strategy for your business, please get in contact.

The Hidden Costs Most Marketplace Articles Don’t Mention

The fee tables on platform websites show you the commission rate. They do not show you the total economic cost of selling on a marketplace, which is invariably higher than the headline number suggests. Below are the hidden costs that most articles ignore and that every marketplace seller eventually discovers the hard way.

1. Returns Rates by Platform

Returns are a cost of doing business on any marketplace but the rates vary significantly. Amazon returns are typically higher than eBay returns because the customer experience is so frictionless. Fashion categories on any platform run at 35-50% return rates. Household and FMCG categories run at 5-10%. Build the expected return rate into your margin model from the start, not as an afterthought.

2. Customer Service Overhead

Marketplaces have strict customer service SLAs. Amazon requires responses within 24 hours, with penalties for missed responses including account health degradation and potential suspension. As volume grows, customer service moves from a part-time afterthought to a meaningful operational cost. For 1,000 orders per month at a 3% query rate, that is 30 queries to handle. At 10,000 orders, it is 300. The economics change.

3. Advertising as a Tax on Visibility

On Amazon especially, organic visibility for new listings is minimal. Sponsored Products advertising is effectively a tax on visibility, and ACOS (Advertising Cost of Sale) of 15-25% is common in competitive categories. This needs to come straight off the gross margin before calculating contribution.

The headline commission rate is the start of the cost calculation, not the end. Build the total cost model before you commit to a platform.

4. Multi-Channel Fulfilment Complexity

Selling on one marketplace is straightforward. Selling on three or four creates operational complexity that compounds quickly; stock allocation across channels, separate dispatch SLAs, different carrier requirements, different returns processes, different customer service tooling. Order management software (Linnworks, Khaos Control, ChannelAdvisor) can solve some of this but adds its own cost.

5. Platform Risk and Concentration Exposure

The longer you depend on a single marketplace, the greater the risk that something will change and damage your business. Fee increases, algorithm changes, account suspensions, policy shifts. None of these are hypothetical. Amazon raises fees most years. Temu has restructured its commission model multiple times. A diversified marketplace strategy is partly a growth play and partly an insurance policy.

6. Brand Erosion

Selling premium products on highly price-sensitive marketplaces can damage brand equity over time. Customers who first encounter your brand on a discount-driven platform may anchor to that lower price point and never accept full price elsewhere. This is particularly relevant for own-brand products that you sell across multiple channels.

AI Discovery & The Future of Marketplaces

Marketplace selection cannot be assessed in isolation from agentic commerce and AI-driven discovery. The way consumers find products is changing rapidly, and the platforms that will win in the future are not necessarily the platforms that won in the past.

ChatGPT Shopping and the End of Generic Search

ChatGPT shopping and similar agentic commerce features are starting to bypass traditional marketplace search entirely. A consumer asking “what is the best value paper towel for a family of four” no longer types that into Amazon’s search bar; they ask ChatGPT and receive a curated answer. The platforms with strong AI integrations (Amazon’s Rufus, Shopify’s integration with ChatGPT) are positioned to benefit. The platforms without are at risk of becoming less discoverable, even if their fees and audience metrics remain attractive.

Visa Intelligent Commerce

Visa Intelligent Commerce is another signal of where the market is heading. The payments network is positioning itself as an enabler of AI-driven transactions, where the AI agent makes the purchase on behalf of the consumer. In that world, the platform’s discoverability inside AI agents becomes more important than its position in Google search.

AI Search Analytics

Measuring success on marketplaces in the AI era requires new metrics. AI Search Analytics is increasingly important to understand traffic, revenue and success in a zero-click world. Marketplaces that publish product data in formats AI agents can consume (structured data, schema markup, clean product feeds) will outperform those that do not.

The marketplaces that will win in the future are the ones that AI agents can recommend, not just the ones with the biggest current audience.

What This Means for Marketplace Selection

For businesses making marketplace selection decisions today, the AI factor adds a seventh consideration to the seven criteria above; how AI-ready is the platform? Amazon and Shopify are clearly investing heavily in this area. TikTok Shop’s content-driven discovery model already aligns with AI-style curation. eBay, OnBuy and the retail-owned marketplaces are further behind. None of this should override the core selection criteria but it should inform your medium-term thinking.

Bringing It All Together : The Marketplace Selection Framework

So let’s bring this all together into a practical framework you can use. Marketplace selection is not a one-off decision; it’s an ongoing strategic discipline that should be reviewed at least annually as platforms evolve and your business grows.

1. Start with the seven criteria. Run your business through product-platform fit, fee structure, fulfilment compatibility, Buy Box dynamics, brand authorisation, customer ownership, and platform risk.
2. Use the decision tree or form above to generate an initial shortlist. The output is an indicative ranking, not a final answer.
3. Validate against your operational capacity. Can you actually fulfil the volume the recommended platforms would generate? Without the operation to support it, no marketplace works.
4. Sequence, do not parallel. Launch on one platform first, get it stable, then add the second. Concurrent multi-platform launches almost always end badly.
5. Build the margin model before you commit. Include all fees, returns, advertising, customer service overhead and a stock-tie-up cost for FBA-style models. If the unit economics do not work on paper, they will not work in practice.
6. Plan the diversification. Even if your first platform is performing brilliantly, plan the second and third platforms as insurance against the concentration risk.
7. Review and refine. Marketplaces evolve constantly. Fees change, algorithms change, new platforms emerge. Review your marketplace mix at least annually and rebalance accordingly.

“The best marketplace strategy is the one that fits your business, not the one with the most platforms. Sequence and discipline matter more than coverage.” – Mark Taylor (Retail Solutions)

Guide to UK Marketplace Selection

This Guide to UK Marketplace Selection is primarily aimed at SME business owners, founders, brand owners and product distributors who want practical guidance on choosing the right marketplaces. If you would like help with marketplace strategy, platform selection, onboarding or optimisation, please get in contact.

Consultancy & Advisory Services

I offer consultancy and advisory services for companies in consumer-facing environments, especially eCommerce, D2C and UK marketplaces. Whether you need a marketplace strategy review, platform onboarding support, or interim eCommerce leadership, I can help. Get in contact for a free initial conversation.