Company lists · Data refreshed September 2026

Top 25 Online marketplace platforms based in London, United Kingdom

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

Compiled by the RevenueBase Data Team Data refreshed Sep 13, 2026 226 companies tracked

RevenueBase identified 226 online marketplace platforms headquartered in London, United Kingdom as of September 2026 and tracks 4,085 professional contacts across them, including 1,130 with verified work emails and 323 with mobile numbers. Across the United Kingdom, London is the largest hub for this category.

This list covers online marketplace platforms headquartered in London, 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 13, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 RevenueBase Smart Search rating on every row Refreshed Sep 13, 2026 86% judged on-target in blind review

226Companies

4,085Contacts tracked

1,130Verified emails

323Mobile numbers

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The 25 largest online marketplace platforms based in London, United Kingdom

Ranked by team size

Top 25 of 226 online marketplace platforms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 13, 2026. RevenueBase Smart Search rates how each company's information relates to online marketplace platforms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	COMET	Strong evidence	London, United KingdomHQ checked Sep 13, 2026	n/a	880 contacts →
	Strong evidence “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: RevenueBase Database · checked Sep 13, 2026
2	ATG Auction Technology Group	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	201-500	371 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 13, 2026
3	SWAP	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	201-500	261 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 13, 2026
4	bark.com	Strong evidence	London, United KingdomHQ checked Sep 13, 2026	201-500	250 contacts →
	Strong evidence “Here at Bark, we are on a mission to revolutionise and become the market leader, go to online marketplace for professional services.” Source: RevenueBase Database · checked Sep 13, 2026
5	gumtree.com	Strong evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	209 contacts →
	Strong evidence “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: RevenueBase Database · checked Sep 13, 2026
6	Secret Sales	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	191 contacts →
	Partial evidence “Secret Sales is a premium e-commerce marketplace for fashion, footwear, accessories, and beauty.” Source: RevenueBase Database · checked Sep 13, 2026
7	Qogita	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	184 contacts →
	Partial evidence “Qogita is a leading global wholesale B2B platform that offers a wide variety of products, brands and categories across geographies.” Source: RevenueBase Database · checked Sep 13, 2026
8	Not On The High Street	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	170 contacts →
	Partial evidence “Founded in 2006, Not On The High Street is the best-loved curated modern marketplace connecting small brands with the world.” Source: RevenueBase Database · checked Sep 13, 2026
9	shopper.com	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	n/a	151 contacts →
	Partial evidence “Shopper.com provides creators with tools and APIs for enabling commerce across all platforms.” Source: RevenueBase Database · checked Sep 13, 2026
10	The Brandalley Group	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	201-500	126 contacts →
	Indirect evidence “Founded in 2008, The BrandAlley Group includes BrandAlley.co.uk, the UK’s leading off-price premium and luxury brand e-tailer.” Source: RevenueBase Database · checked Sep 13, 2026
11	ONBUY	Strong evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	126 contacts →
	Strong evidence “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: RevenueBase Database · checked Sep 13, 2026
12	Payhip	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	n/a	66 contacts →
	Partial evidence “Payhip is an e-commerce platform that enables anyone to sell digital products or memberships directly to their fans and followers.” Source: RevenueBase Database · checked Sep 13, 2026
13	Digital Ventures	Strong evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	60 contacts →
	Strong evidence “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: RevenueBase Database · checked Sep 13, 2026
14	Rated People	Strong evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	58 contacts →
	Strong evidence “We’re the UK’s best online marketplace connecting great homeowners with great local tradespeople.” Source: RevenueBase Database · checked Sep 13, 2026
15	BIDOO	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	38 contacts →
	Indirect evidence “Be part of the world's most entertaining, unconventional and revolutionary e-commerce company and work daily with your favourite brands.” Source: RevenueBase Database · checked Sep 13, 2026
16	Materials Market	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	35 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 13, 2026
17	Appear Here	Strong evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	34 contacts →
	Strong evidence “Appear Here is the leading online marketplace for retail space.” Source: RevenueBase Database · checked Sep 13, 2026
18	businessesforsale.com	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	25 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 13, 2026
19	LACED	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	18 contacts →
	Partial evidence “Laced is a marketplace for the buying and selling of authentic luxury goods.” Source: RevenueBase Database · checked Sep 13, 2026
20	Retail Direct	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	16 contacts →
	Indirect evidence “Retail Direct specialises in the resell and promotion of products from some of the biggest brand names across Europe.” Source: RevenueBase Database · checked Sep 13, 2026
21	INDIY	Strong evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	16 contacts →
	Strong evidence “Indie MarketPlace Buy and Sell music services online with peace of mind "Be the music industry"” Source: RevenueBase Database · checked Sep 13, 2026
22	Novafori	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	15 contacts →
	Partial evidence “NovaFori specialises in designing, building and operating highly scalable marketplace solutions powered by auction and trading technology.” Source: RevenueBase Database · checked Sep 13, 2026
23	Dynergy LTD	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	12 contacts →
	Indirect evidence “Dynergy ltd is an established global e-commerce business headquartered in London.” Source: RevenueBase Database · checked Sep 13, 2026
24	lovethesales.com	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	12 contacts →
	Partial evidence “Love the Sales is the world’s leading premium fashion marketplace.” Source: RevenueBase Database · checked Sep 13, 2026
25	KYC PAY	Strong evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	12 contacts →
	Strong evidence “MARKETPLACE FOR DIRECT MATCHING BUSINESS & FINANCIAL PROVIDERS Innovation Fintech 5.0 Platform Solving business needs in the area of payment gateways, transactions and legal…” Source: RevenueBase Database · checked Sep 13, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: online marketplace platforms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names online marketplace platforms.
Partial evidence: Its own public description names part of online marketplace platforms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name online marketplace platforms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 226 online marketplace platforms based in London, United Kingdom

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Online marketplace platforms based in London, United Kingdom at a glance

As of Sep 13, 2026

27.7%Verified-email coverage

7.9%Mobile-number coverage

18.1Average contacts per company

1-10Median size (employees)

Sep 13, 2026Page data refreshed

Companies by employee count

1-10

120

11-50

51-200

201-500

501-1,000

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 15.0d

8930–30

22431–60

561–90

090–180

8180+

Company record updated

Median 78.0d

00–30

1,27331–60

2,04561–90

56190–180

206180+

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 RevenueBase Smart Search 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 Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in London, 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.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names online marketplace platforms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
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 London 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 its RevenueBase Smart Search 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, 1,130 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 13, 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.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names online marketplace platforms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

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

RevenueBase identified 226 online marketplace platforms headquartered in London, 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 in the United Kingdom has the most online marketplace platforms?

London leads the United Kingdom 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 1,130 verified decision-maker contacts tracked across these 226 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 13, 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 Smart Search, 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.