Online shopping isn’t a “trend” anymore, it’s just how the UK shops. Online sales now make up more than a third of all UK retail spend, and the market is worth over £150 billion a year. Behind those numbers sit a handful of household names that most of us use without even thinking about it: Amazon, eBay, Argos, and co.
But what actually makes these sites so successful? It’s not luck. It’s smart platforms, fast checkouts, and websites built to keep people coming back. In this guide, we’re breaking down the 13 biggest e-commerce websites in the UK, what makes each one tick, and what smaller businesses can actually learn from them.
Quick jump: the 13 e-commerce sites on this list
- Amazon UK
- eBay UK
- ASOS
- Argos
- Tesco
- M&S
- ASDA
- Currys
- Gumtree
- Screwfix
- John Lewis
- Next
- Boots
Before we get into each one, here’s a quick look at the bigger picture.
UK e-commerce in 2026: the numbers that matter
A few stats worth knowing before we dive in:
- Online sales now make up over a third of UK retail spending – one of the highest shares in Europe.
- 87% of UK adults shop online, and most of them do it regularly, not just once in a while.
- Mobile now drives more than half of all online orders. If a site’s app or mobile checkout is clunky, it loses customers fast.
- Fashion is the biggest online category, followed closely by electronics and groceries.
- Amazon still sits well ahead of everyone else on pure traffic, but the gap between the “big three” (Amazon, eBay, and fast-growing marketplace Temu) and the rest has been getting tighter.
Keep these in mind as you go through the list – they explain a lot of why these brands do what they do.
1. Amazon UK
No surprises here. Amazon is the biggest online shop in the UK, and it isn’t close. It regularly pulls in over 200 million visits a month, more than double its nearest competitor.
What keeps it on top isn’t just size, it’s convenience. Same-day and next-day delivery through Prime, an enormous product range, and a checkout that takes about ten seconds because your details are already saved. Amazon also leans heavily on customer reviews and “customers also bought” prompts, which do a lot of quiet work in getting people to buy more than they planned to.
Why it works: Amazon removes friction at every single step. That’s the whole playbook.
Traffic breakdown July-2026 (Total: 276.5M)
- Direct: 203.6M
- Organic search: 48.7M
- Referral: 17.6M
- Organic social: 3.4M
- Email: 1.8M
- Paid search: 370.4K
- Display ads: 396.2K
- Paid social: 138.8K
- AI: 368.2K
- Google AI: 175.3K
2. eBay UK
eBay’s been around since 1995, and it’s still one of the most-visited shopping sites in the country, pulling in tens of millions of UK visits every month.
What makes eBay different is that it isn’t really one shop, it’s millions of small sellers under one roof, mixing brand-new items with second-hand and rare finds. That’s a big reason it’s held its ground even as Amazon has grown: eBay is where people go when they want something specific, unusual, or cheaper second-hand, not just “any version of this product.”
Why it works: Choice and price. eBay lets buyers compare loads of sellers for the same item in one place.
Traffic breakdown (total: 127.1M)
- Direct: 89.4M
- Organic search: 20.9M
- Paid search: 7.7M
- Referral: 5.9M
- Organic social: 1.1M
- Email: 1.4M
- Display ads: 229.9K
- Paid social: 116.7K
- AI: 220.4K
- Google AI: 79.9K
3. ASOS
ASOS, short for “As Seen On Screen”, started out selling celebrity-inspired fashion and grew into one of the UK’s biggest online-only clothing retailers. It’s built to appeal to a younger, fashion-first crowd, and it still pulls in tens of millions of visits every month.
Speed matters a lot here. ASOS runs on a modern tech setup designed to load pages quickly, which matters hugely for fashion browsing, where people scroll through dozens of products in one sitting. Its size guides, saved items, and easy returns process also help nervous online shoppers hit “buy” with more confidence.
Why it works: Fast browsing, easy returns, and a strong sense of “this brand gets my style.”
Traffic breakdown (total: 48.9M)
- Direct: 31.5M
- Organic search: 6.8M
- Paid search: 4.6M
- Referral: 3.3M
- Organic social: 675.4K
- Email: 1.2M
- Display ads: 604.7K
- Paid social: 120.7K
- AI: 79.0K
- Google AI: 13.3K
4. Argos
Argos sells over 60,000 products and is one of the most recognisable names on the UK high street and online. It’s part of the Sainsbury’s group now, which has helped it lean further into “buy online, collect same day” shopping.
That click-and-collect model is really Argos’s superpower. A lot of shoppers use the site to check stock before nipping to a local store, which blends online browsing with the instant gratification of walking out with the item that day.
Why it works: It bridges the gap between online convenience and “I want it now.”
Traffic breakdown (total: 40.9M)
- Direct: 28.7M
- Organic search: 5.9M
- Paid search: 4.4M
- Referral: 1.2M
- Email: 343.0K
- Organic social: 164.0K
- Display ads: 156.8K
- AI: 81.8K
- Google AI: 12.7K
- Paid social: 6.7K
5. Tesco
Tesco is best known for groceries, but its online store covers everything from electronics to homeware, and it delivers to well over a million customers every week between stores and online orders.
The site is built entirely in-house, which gives Tesco full control over things like stock updates, delivery slot management, and loyalty scheme integration (Clubcard). That in-house control is a big deal at Tesco’s scale – a smaller, off-the-shelf platform simply couldn’t handle that volume of daily orders.
Why it works: Reliability at scale, plus a loyalty scheme that keeps people ordering from the same place out of habit.
Traffic breakdown (total: 26.2M)
- Direct: 18.2M
- Organic search: 5.6M
- Referral: 1.2M
- Paid search: 722.5K
- Email: 233.5K
- Organic social: 119.1K
- Paid social: 46.5K
- AI: 25.6K
- Display ads: 32.8K
- Google AI: 9.6K
6. M&S
Marks & Spencer covers food, clothing, and homeware, and it’s built a strong reputation for quality over the decades. Online, it’s become one of the more trusted names for clothing shoppers who want something a bit more premium than fast fashion.
The site is built to make quality and material details easy to find, which matters when you’re paying a bit more and want to know it’s worth it. M&S has also worked hard on connecting its food delivery service with its high street stores, so shoppers can order online and collect nearby.
Why it works: Trust in the brand does a lot of the selling before the customer even reaches checkout.
Traffic breakdown (total: 20.2M)
- Direct: 13.7M
- Organic search: 4.2M
- Referral: 701.5K
- Paid search: 1.1M
- Email: 181.3K
- Organic social: 116.3K
- Paid social: 85.2K
- AI: 40.3K
- Display ads: 13.7K
- Google AI: 6.1K
7. ASDA
ASDA has been serving UK shoppers since the 1960s, and its online store now runs alongside a huge network of supermarkets and superstores.
Its e-commerce platform was built using a mix of custom development and established retail tech, all aimed at keeping grocery delivery slots and stock levels accurate, which is the single biggest thing that can go wrong with an online supermarket. Get that wrong and customers won’t come back.
Why it works: Dependability. People shopping for groceries online want zero surprises.
Traffic breakdown (total: 25.4M)
- Direct: 18.4M
- Organic search: 4.5M
- Referral: 638.9K
- Paid search: 1.2M
- Email: 567.1K
- Organic social: 53.5K
- Paid social: 15.4K
- AI: 13.9K
- Display ads: 11.5K
- Google AI: 5.9K
8. Currys
Currys is the UK’s biggest electronics retailer, covering everything from laptops to washing machines, both online and in-store.
What sets it apart from a pure marketplace like Amazon is expert advice – buying guides, comparison tools, and support that helps people choose the right laptop or fridge rather than just scrolling a list of specs. For big-ticket, “I don’t buy this every week” purchases, that guidance builds real trust.
Why it works: It sells confidence, not just products – important when the average basket size is much higher than a typical online order.
Traffic breakdown (total: 24.2M)
- Direct: 16.6M
- Organic search: 4.8M
- Referral: 709.1K
- Paid search: 1.8M
- Paid social: 126.3K
- Organic social: 39.2K
- Email: 42.4K
- AI: 48.6K
- Display ads: 23.0K
- Google AI: 12.8K
9. Gumtree
Gumtree has been a go-to classifieds site since the early 2000s, built around local, person-to-person listings, everything from furniture to jobs to flats to rent.
Unlike most sites on this list, Gumtree isn’t selling anything itself. It’s a marketplace for regular people, which means its main job is making local search fast and safe. That’s a very different (and honestly harder) problem to solve than running a normal online shop.
Why it works: It fills a gap none of the big retailers can – local, second-hand, person-to-person trade.
Traffic breakdown (total: 10.5M)
- Direct: 7.6M
- Organic search: 2.1M
- Referral: 287.3K
- Email: 373.7K
- Organic social: 47.5K
- AI: 22.1K
- Paid search: 8.1K
- Google AI: 2.6K
- Paid social: 688
- Display ads: 0
10. Screwfix
Screwfix sells tools, hardware, and trade supplies, and it backs up its huge online range with over 700 physical stores across the UK.
Its site is built for speed and simplicity, not browsing, most customers know exactly what they need (a specific drill bit, a certain size of screw) and want to find it fast, check it’s in stock nearby, and collect it within the hour. Screwfix’s whole online experience is designed around that “I need this today” mindset.
Why it works: It respects the customer’s time. Trade customers especially don’t want a slow, fussy checkout.
Traffic breakdown (total: 19.2M)
- Direct: 11.6M
- Organic search: 4.6M
- Paid search: 2.3M
- Referral: 468.9K
- Paid social: 60.2K
- Organic social: 34.8K
- AI: 35.0K
- Email: 92.2K
- Google AI: 9.1K
- Display ads: 5.5K
11. John Lewis
John Lewis is one of the UK’s most respected department stores, known for a “never knowingly undersold” reputation and genuinely helpful customer service.
Its website leans on that same reputation – clear product information, honest reviews, and a returns policy that doesn’t feel like a fight. John Lewis has also worked to make its online store feel like an extension of its in-store experience, right down to how staff picks and recommendations show up on product pages.
Why it works: Customer trust, built over decades, carries over from the high street to the website.
Traffic breakdown (total: 17.3M)
- Direct: 11.0M
- Organic search: 3.6M
- Paid search: 1.6M
- Referral: 566.9K
- Email: 354.9K
- Organic social: 62.8K
- Paid social: 24.3K
- AI: 52.2K
- Google AI: 9.9K
- Display ads: 11.2K
12. Next
Next sells clothing and homeware for men, women, kids, and babies, and it’s one of the more consistently strong UK fashion retailers online.
One thing Next does particularly well is audience targeting, showing shoppers products that actually match their previous browsing and buying habits, rather than a generic homepage. It also has one of the highest “pages per visit” rates of any UK retail site, which means people don’t just land and leave, they properly browse.
Why it works: Personalisation that feels useful rather than creepy, plus a huge, well-organised product catalogue.
Traffic breakdown (total: 24.7M)
- Direct: 18.2M
- Organic search: 3.5M
- Paid search: 1.6M
- Referral: 949.5K
- Email: 265.8K
- Organic social: 97.1K
- Paid social: 55.6K
- AI: 39.5K
- Display ads: 16.3K
- Google AI: 5.5K
13. Boots
Boots is the UK’s leading health and beauty retailer, with well over 2,000 stores and a strong pharmacy service alongside its beauty and wellness range.
Its site benefits from the same trust that built the high street chain, people already believe Boots on health and skincare advice, so buying products from the same brand online is an easy next step. The Boots Advantage Card loyalty scheme also does a lot of heavy lifting, rewarding repeat purchases in a way that keeps customers coming back.
Why it works: A loyalty scheme people actually use, paired with genuine trust in health and beauty advice.
Traffic breakdown (total: 23.9M)
- Direct: 15.7M
- Organic search: 4.4M
- Paid search: 1.9M
- Referral: 523.9K
- Email: 1.2M
- Organic social: 73.7K
- AI: 25.8K
- Display ads: 47.6K
- Google AI: 11.9K
- Paid social: 7.5K
What These Top E-Commerce Sites All Have in Common
Looking across all 13, a few patterns keep showing up:
- Fast, simple checkouts. Every single one of these sites has stripped out unnecessary steps between “add to basket” and “order confirmed.”
- Mobile-first design. With over half of UK online orders now happening on phones, a clunky mobile site is a dealbreaker.
- Loyalty schemes that actually pay off. Tesco Clubcard, Boots Advantage Card, and similar schemes keep customers loyal by rewarding them in ways that feel worth the effort.
- Click-and-collect where it makes sense. Argos, Tesco, and Screwfix all lean on the “order online, collect nearby” model, blending the best of online and in-store shopping.
- Trust signals everywhere. Reviews, clear returns policies, and honest product information show up again and again, because uncertainty is the number one reason people abandon an online basket.
If you’re building or improving your own e-commerce site, these five points are a genuinely good checklist to work through.
Challengers worth keeping an eye on
The list above covers the established names, but a few newer players are shaking things up and are worth a mention:
- Temu has grown fast in the UK on the back of very low prices and constant promotions, and now sits close to the top of UK shopping traffic.
- Etsy continues to grow as the go-to spot for handmade, vintage, and personalised items, a different kind of shopping to the big mainstream retailers.
- TikTok Shop has turned social media browsing into direct, in-app buying, especially for beauty and fashion, and it’s becoming a genuine competitor rather than just a novelty.
None of them have knocked Amazon or eBay off the top spot yet, but they’re changing what shoppers expect – faster discovery, more impulse buying, and shopping that happens inside apps people already use for something else.
What makes a successful e-commerce website in the UK?
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How does social media marketing help e-commerce businesses?
Which is the biggest e-commerce website in the UK?
Is Argos still relevant with Amazon around?
What UK e-commerce sites are growing fastest right now?
Do I need to be this big to run a successful online shop?
The takeaway
Amazon still leads the pack, but every site on this list earned its place by solving a specific problem well, whether that’s speed, trust, choice, or convenience. If you’re running your own online shop, you don’t need Amazon’s budget to borrow its best habits: make the checkout easy, make your site work properly on mobile, and give people a reason to trust you and come back.
