Company lists · Data refreshed September 2026

Top 22 Online auction marketplaces based in the United Kingdom

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

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 97 companies tracked

RevenueBase identified 97 online auction marketplaces headquartered in the United Kingdom as of September 2026 and tracks 1,049 professional contacts across them, including 457 with verified work emails. London is the largest hub.

This list covers online auction marketplaces 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 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 20, 2026 86% judged on-target in blind review

97Companies

1,049Contacts tracked

457Verified emails

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The 22 largest online auction marketplaces based in the United Kingdom

Ranked by team size

Top 22 of 97 online auction marketplaces based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to online auction marketplaces: 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	ATG Auction Technology Group	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	201-500	371 contacts →
	Partial 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 20, 2026
2	gumtree.com	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	209 contacts →
	Partial 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 20, 2026
3	Collecting Cars	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	75 contacts →
	Partial evidence “Collecting Cars is the leading global digital auction platform for collectible cars, bikes, and automobilia.” Source: RevenueBase Database · checked Sep 20, 2026
4	BIDOO	Indirect evidence	London, United KingdomHQ checked Sep 20, 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 20, 2026
5	Simon Charles Auctioneers	Partial evidence	Stockport, United KingdomHQ checked Sep 20, 2026	51-200	26 contacts →
	Partial evidence “We are one of Europe's largest auctioneers, with over 70 years' auction experience, we work with top retailers, distributors and manufacturers to bring well-known brands to…” Source: RevenueBase Database · checked Sep 20, 2026
6	Easy Live Auction	Strong evidence	Eastbourne, United KingdomHQ checked Sep 20, 2026	11-50	22 contacts →
	Strong evidence “Live Online Bidding at Real Auction Houses BROWSE, BID, BUY Products Live Auction Bidding Timed Auction Bidding Auction Management Software White Label Websites (Live/Timed…” Source: RevenueBase Database · checked Sep 20, 2026
7	Wellers Auctions LTD	Partial evidence	Guildford, United KingdomHQ checked Sep 20, 2026	11-50	16 contacts →
	Partial evidence “Based in the heart of Surrey, Wellers Auctions, have a wealth of experience in bringing to you an exciting array of weekly & monthly auctions via live and timed auction platforms…” Source: RevenueBase Database · checked Sep 20, 2026
8	Artisio	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	15 contacts →
	Strong evidence “Artisio is a complete front-to-back auction management software solution & online bidding platform, that helps businesses run online auctions and streamline auction back office…” Source: RevenueBase Database · checked Sep 20, 2026
9	Novafori	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	15 contacts →
	Strong evidence “NovaFori specialises in designing, building and operating highly scalable marketplace solutions powered by auction and trading technology.” Source: RevenueBase Database · checked Sep 20, 2026
10	GBM Auctions	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	1-10	12 contacts →
	Partial evidence “GBM is the auction system where bidders make money when they are outbid.$200M+ in bidding volume and over $6M earned by bidders to date!” Source: RevenueBase Database · checked Sep 20, 2026
11	Watch Collecting	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	12 contacts →
	Indirect evidence “Since launching in 2021, Collecting Cars sister brand Watch Collecting has quickly established itself as a leading platform for collectible fine watches, with over 4,500 lots sold…” Source: RevenueBase Database · checked Sep 20, 2026
12	Bonhams Cars Online	Strong evidence	Abingdon, United KingdomHQ checked Sep 20, 2026	11-50	9 contacts →
	Strong evidence “Bonhams Cars Online - Classic & Collectable Car Auctions \| FREE TO SELL \| Our mission is to make the buying and selling of classic and collector vehicles as transparent, secure…” Source: RevenueBase Database · checked Sep 20, 2026
13	Auction News	Partial evidence	Derby, United KingdomHQ checked Sep 20, 2026	1-10	9 contacts →
	Partial evidence “Auction News is the UK’s longest-standing digital auction marketing and media platform.” Source: RevenueBase Database · checked Sep 20, 2026
14	William George	Indirect evidence	Stamford, United KingdomHQ checked Sep 20, 2026	1-10	9 contacts →
	Indirect evidence “Founded in 2012, William George has consistently grown and continues to flourish and innovate.” Source: RevenueBase Database · checked Sep 20, 2026
15	Cottrill & CO	Strong evidence	Birmingham, United KingdomHQ checked Sep 20, 2026	11-50	8 contacts →
	Strong evidence “We are focused predominantly as Online Auctioneers, selling all types of manufacturing assets worldwide.” Source: RevenueBase Database · checked Sep 20, 2026
16	Whoobid Property Auctioneers	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	8 contacts →
	Partial evidence “In a market where online estate agencies are having an ever increasing share of the market and consumer demands are leading towards online services, Whoobid have taken the…” Source: RevenueBase Database · checked Sep 20, 2026
17	Azca Auctions	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	1-10	7 contacts →
	Partial evidence “At Azca Auctions, we connect discerning buyers and passionate sellers through expertly curated auctions of antiques, luxury collectables and fine art.” Source: RevenueBase Database · checked Sep 20, 2026
18	Irostrum Online Auctions	Strong evidence	Reading, United KingdomHQ checked Sep 20, 2026	11-50	6 contacts →
	Strong evidence “iRostrum is enterprise white-label online auction software for organisations running professional auctions under their own brand.” Source: RevenueBase Database · checked Sep 20, 2026
19	The Great Western Auctions LTD	Partial evidence	Glasgow, United KingdomHQ checked Sep 20, 2026	11-50	4 contacts →
	Partial evidence “Great Western Auctions attracts consignments from all areas in the UK and our experts are delighted to visit your property for valuation purposes.” Source: RevenueBase Database · checked Sep 20, 2026
20	Shooting Brake	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	1-10	2 contacts →
	Partial evidence “Shooting Brake is the smartest, safest and easiest auction platform to buy and sell enthusiast cars.” Source: RevenueBase Database · checked Sep 20, 2026
21	Machinery Market	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	1-10	2 contacts →
	Strong evidence “MachineryMarket is the global online marketplace for business and agricultural equipment.” Source: RevenueBase Database · checked Sep 20, 2026
22	Hammer Timed	Strong evidence	Lancaster, United KingdomHQ checked Sep 20, 2026	1-10	1 contacts →
	Strong evidence “Hammer Timed is an online machinery auction offering a wide range of Agricultural, Construction and Commercial equipment.” Source: RevenueBase Database · checked Sep 20, 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 auction marketplaces. 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 auction marketplaces.
Partial evidence: Its own public description names part of online auction marketplaces, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name online auction marketplaces. 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 22 of 97 online auction marketplaces based in the United Kingdom

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Online auction marketplaces based in the United Kingdom at a glance

As of Sep 20, 2026

43.6%Verified-email coverage

10.8Average contacts per company

1-10Median size (employees)

38.1%Largest-city concentration · London

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 97 companies.

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 auction marketplaces, 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 the United Kingdom whose own description of what they do matches “online auction marketplaces”. 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 auction marketplaces), 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 auction marketplaces, 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 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, 457 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 20, 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 auction marketplaces by metro

Online auction marketplaces in London37

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 auction marketplaces, 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 auction marketplaces are there based in the United Kingdom?

RevenueBase identified 97 online auction marketplaces 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?

ATG Auction Technology Group, headquartered in London, tops this list with the largest team on record.

Which city has the most online auction marketplaces?

London leads with 37 headquartered companies, followed by Birmingham (3) and Derby (2).

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 457 verified decision-maker contacts tracked across these 97 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 20, 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.