Company lists · Data refreshed September 2026

Top 25 Online marketplace platforms based in the United Kingdom

Name: Online marketplace platforms based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 474 companies tracked

RevenueBase identified 474 online marketplace platforms headquartered in the United Kingdom as of September 2026 and tracks 5,602 professional contacts across them, including 1,541 with verified work emails and 438 with mobile numbers. London is the largest hub.

This list covers online marketplace platforms headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 5, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

474Companies

5,602Contacts tracked

1,541Verified emails

438Mobile numbers

Unlock all 474 companies Free signup · no credit card · 500 free credits

The 25 largest online marketplace platforms based in the United Kingdom

Ranked by team size

Top 25 of 474 online marketplace platforms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names online marketplace platforms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	COMETStrong evidence	London, United KingdomHQ checked Sep 5, 2026	n/a	880
	“Comet is an online electrical marketplace offering stellar deals on technology and appliances from a galaxy of top brands including Samsung, Sony, Acer, Hotpoint, Apple & more.” Source: company website · checked Sep 5, 2026
2	ATG Auction Technology GroupIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	371
	“A global technology company with over 450 employees, ATG is transforming the way billions of pounds, euros and dollars' worth of items are bought and sold globally via auction.” Source: company website · checked Sep 5, 2026
3	SWAPIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	261
	“Swap built the first agentic Storefront that replaces your traditional static website with an immersive agent-led commerce experience, guiding shoppers through product discovery…” Source: company website · checked Sep 5, 2026
4	bark.comStrong evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	250
	“Here at Bark, we are on a mission to revolutionise and become the market leader, go to online marketplace for professional services.” Source: company website · checked Sep 5, 2026
5	LinnworksIndirect evidence	Chichester, United KingdomHQ checked Sep 5, 2026	201-500	223
	“Linnworks helps ecommerce brands and retailers take control of their commerce operations, so they can focus on growth, not firefighting.” Source: company website · checked Sep 5, 2026
6	gumtree.comStrong evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	209
	“Gumtree is one of the UK’s most popular online classifieds platforms, connecting millions of people every month to buy, sell, and trade locally - something we’ve done since But…” Source: company website · checked Sep 5, 2026
7	Secret SalesPartial evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	191
	“Secret Sales is a premium e-commerce marketplace for fashion, footwear, accessories, and beauty.” Source: company website · checked Sep 5, 2026
8	QogitaPartial evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	184
	“Qogita is a leading global wholesale B2B platform that offers a wide variety of products, brands and categories across geographies.” Source: company website · checked Sep 5, 2026
9	Not On The High StreetPartial evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	170
	“Founded in 2006, Not On The High Street is the best-loved curated modern marketplace connecting small brands with the world.” Source: company website · checked Sep 5, 2026
10	shopper.comPartial evidence	London, United KingdomHQ checked Sep 5, 2026	n/a	151
	“Shopper.com provides creators with tools and APIs for enabling commerce across all platforms.” Source: company website · checked Sep 5, 2026
11	fruugo.comPartial evidence	Ulverston, United KingdomHQ checked Sep 5, 2026	51-200	149
	“Fruugo is a unique, fully localised global marketplace where shoppers in 46 countries can buy products from retailers all around the world.” Source: company website · checked Sep 5, 2026
12	The Brandalley GroupIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	126
	“Founded in 2008, The BrandAlley Group includes BrandAlley.co.uk, the UK’s leading off-price premium and luxury brand e-tailer.” Source: company website · checked Sep 5, 2026
13	ONBUYStrong evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	126
	“We’re OnBuy, the British born online marketplace that offers amazing choice, the brands you love, and instantly redeemable Cashback on everything you buy.” Source: company website · checked Sep 5, 2026
14	TAMBOIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	102
	“Tambo is now part of Luzern eCommerce.” Source: company website · checked Sep 5, 2026
15	PayhipPartial evidence	London, United KingdomHQ checked Sep 5, 2026	n/a	66
	“Payhip is an e-commerce platform that enables anyone to sell digital products or memberships directly to their fans and followers.” Source: company website · checked Sep 5, 2026
16	Digital VenturesStrong evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	60
	“Digital Ventures began in the late 1990s, when we identified an online opportunity in the New York flat-sharing market and launched our first platform: Roomgo which grew into one…” Source: company website · checked Sep 5, 2026
17	Rated PeopleStrong evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	58
	“We’re the UK’s best online marketplace connecting great homeowners with great local tradespeople.” Source: company website · checked Sep 5, 2026
18	KRANKIndirect evidence	Cambridge, United KingdomHQ checked Sep 5, 2026	11-50	42
	“Krank is changing the way heavy equipment is traded globally.” Source: company website · checked Sep 5, 2026
19	BIDOOIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	38
	“Be part of the world's most entertaining, unconventional and revolutionary e-commerce company and work daily with your favourite brands.” Source: company website · checked Sep 5, 2026
20	Merkandi.comPartial evidence	Rotherham, United KingdomHQ checked Sep 5, 2026	11-50	37
	“Merkandi is the platform No.” Source: company website · checked Sep 5, 2026
21	Materials MarketPartial evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	35
	“Materials Market is a UK‑based digital marketplace for construction materials, built to make buying and supplying building materials simpler, clearer and more predictable.” Source: company website · checked Sep 5, 2026
22	Appear HereStrong evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	34
	“Appear Here is the leading online marketplace for retail space.” Source: company website · checked Sep 5, 2026
23	BoulevardPartial evidence	Worcester, United KingdomHQ checked Sep 5, 2026	11-50	28
	“Boulevard is empowering the future of E-commerce & Logistics, with expertise in Marketplaces and Innovative Technology.” Source: company website · checked Sep 5, 2026
24	Love Shopping DirectIndirect evidence	Walsall, United KingdomHQ checked Sep 5, 2026	51-200	27
	“In 2008, Nick Kandola noticed something wrong in the industry.” Source: company website · checked Sep 5, 2026
25	businessesforsale.comPartial evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	25
	“BusinessesForSale.com is the leading international advertising platform for buying and selling businesses, attracting over 1.2 million global buyers and sellers every month.” Source: company website · checked Sep 5, 2026

Showing 25 of 474 online marketplace platforms based in the United Kingdom

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Online marketplace platforms based in the United Kingdom at a glance

As of Sep 5, 2026

1-10Median size (employees)

LondonLargest hub · 229 HQs

438Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

269

11-50

138

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Verified emails by last verification

0–30

1,445

31–60

61–90

90–180

180+

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among online marketplace platforms, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “online marketplace platforms”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among online marketplace platforms, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and an evidence rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 1,541 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 5, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Online marketplace platforms by metro

Online marketplace platforms in London229

Frequently asked

How many online marketplace platforms are there based in the United Kingdom?

RevenueBase identified 474 online marketplace platforms headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

COMET, headquartered in London, tops this list with the largest team on record.

Which city has the most online marketplace platforms?

London leads with 229 headquartered companies, followed by Manchester (16) and Birmingham (12).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,541 verified decision-maker contacts tracked across these 474 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 5, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.