Company lists · Data refreshed September 2026

Top 25 Custom ecommerce development firms based in the United Kingdom

Name: Custom ecommerce development firms based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 510 companies tracked

RevenueBase identified 510 custom ecommerce development firms headquartered in the United Kingdom as of September 2026 and tracks 10,567 professional contacts across them, including 660 with verified work emails. London is the largest hub.

This list covers custom ecommerce development firms 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 19, 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 19, 2026 86% judged on-target in blind review

510Companies

10,567Contacts tracked

660Verified emails

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The 25 largest custom ecommerce development firms based in the United Kingdom

Ranked by team size

Top 25 of 510 custom ecommerce development firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to custom ecommerce development firms: 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	Sweans	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	136 contacts →
	Partial evidence “Sweans® is a London-based independent eCommerce agency & Shopify Expert.” Source: RevenueBase Database · checked Sep 19, 2026
2	BSS Commerce	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	201-500	93 contacts →
	Indirect evidence “BSS Commerce is a global All-in-One E-Commerce Solutions Agency that combines enterprise expertise with startup agility to deliver measurable results.” Source: RevenueBase Database · checked Sep 19, 2026
3	TOM & CO	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	79 contacts →
	Indirect evidence “Who We Are: At Tom & Co, we’re a forward-thinking Adobe Commerce agency dedicated to designing, building, and maintaining high-performance e-commerce websites, always with the…” Source: RevenueBase Database · checked Sep 19, 2026
4	Williams Commerce	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	74 contacts →
	Partial evidence “Established in 2009, Williams Commerce is a ecommerce agency focused on Building, Optimising and Growing ecommerce brands.” Source: RevenueBase Database · checked Sep 19, 2026
5	Tacit Knowledge, A Grid Dynamics Company	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	48 contacts →
	Indirect evidence “Tacit Knowledge is the digital commerce consultancy that delivers Silicon Valley innovation to brands around the world.” Source: RevenueBase Database · checked Sep 19, 2026
6	Space 48	Indirect evidence	Manchester, United KingdomHQ checked Sep 19, 2026	51-200	39 contacts →
	Indirect evidence “Space 48 is now part of Glass Atlas.” Source: RevenueBase Database · checked Sep 19, 2026
7	247 Commerce Seamless Ecommerce. Integrated Growth	Partial evidence	Brentford, United KingdomHQ checked Sep 19, 2026	51-200	39 contacts →
	Partial evidence “247 Commerce fuels ambitious ecommerce brands.” Source: RevenueBase Database · checked Sep 19, 2026
8	RED Technology	Partial evidence	Eynsham, United KingdomHQ checked Sep 19, 2026	11-50	38 contacts →
	Partial evidence “Red Technology is a leading ecommerce solutions provider, combining ecommerce agency services and authoring a sophisticated ecommerce platform.” Source: RevenueBase Database · checked Sep 19, 2026
9	RVS Media LTD	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	36 contacts →
	Strong evidence “RVS Media is an established creative eCommerce development company based in London.” Source: RevenueBase Database · checked Sep 19, 2026
10	YYT	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	n/a	33 contacts →
	Partial evidence “YYT is a modern eCommerce agency based in London.” Source: RevenueBase Database · checked Sep 19, 2026
11	Vortex IQ	Indirect evidence	Brentford, United KingdomHQ checked Sep 19, 2026	11-50	32 contacts →
	Indirect evidence “At VortexIQ, we are driven by a fundamental belief in the transformative power of technology to enhance the lives of e-commerce retailers and their dedicated teams.” Source: RevenueBase Database · checked Sep 19, 2026
12	Ebusiness Guru	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	32 contacts →
	Indirect evidence “Ebusiness Guru is one of the leading multi channel solutions catering to companies from a wide range of industries.” Source: RevenueBase Database · checked Sep 19, 2026
13	Unified	Partial evidence	Richmond, United KingdomHQ checked Sep 19, 2026	51-200	28 contacts →
	Partial evidence “We are an ecommerce agency based in London As experts in Magento (Adobe Commerce), Shopify Plus and BigCommerce, brands come to us looking for bold strategies that put growth…” Source: RevenueBase Database · checked Sep 19, 2026
14	TSD	Partial evidence	Hole In The Wall, United KingdomHQ checked Sep 19, 2026	11-50	28 contacts →
	Partial evidence “The Site Doctor is a web design and development company based in Herefordshire.” Source: RevenueBase Database · checked Sep 19, 2026
15	IWEB	Partial evidence	Stafford, United KingdomHQ checked Sep 19, 2026	11-50	25 contacts →
	Partial evidence “iWeb are a full-service eCommerce agency, Magento Enterprise Solution Partner and Akeneo Gold Partner, with over 24 years experience designing and developing eCommerce websites…” Source: RevenueBase Database · checked Sep 19, 2026
16	Fluid Commerce	Strong evidence	Manchester, United KingdomHQ checked Sep 19, 2026	11-50	25 contacts →
	Strong evidence “Fluid Commerce is a multi-award-winning B2B ecommerce agency with specialist expertise in delivering ecommerce websites, customer portals and integrations with all major B2B…” Source: RevenueBase Database · checked Sep 19, 2026
17	RA Creative	Partial evidence	Nottingham, United KingdomHQ checked Sep 19, 2026	11-50	22 contacts →
	Partial evidence “A full-service eCommerce agency based in Nottingham.” Source: RevenueBase Database · checked Sep 19, 2026
18	Infovinity Systems Pvt. Limited	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	21 contacts →
	Partial evidence “Infovinity Systems offers the e-commerce development solutions that will act as the link between your internet business and world."Clever Technology can be easy to use, Really…” Source: RevenueBase Database · checked Sep 19, 2026
19	Iconography LTD	Partial evidence	Ilminster, United KingdomHQ checked Sep 19, 2026	11-50	20 contacts →
	Partial evidence “We are a professional eCommerce and multi-channel agency based in the South West.” Source: RevenueBase Database · checked Sep 19, 2026
20	Digital Boutique	Partial evidence	Edinburgh, United KingdomHQ checked Sep 19, 2026	11-50	20 contacts →
	Partial evidence “Digital Boutique is an eCommerce agency that produce world class eCommerce websites.” Source: RevenueBase Database · checked Sep 19, 2026
21	Paraspar LTD	Partial evidence	Edgware, United KingdomHQ checked Sep 19, 2026	11-50	19 contacts →
	Partial evidence “We are a leading eCommerce and digital marketing solutions provider focused on delivering powerful online business systems and services to retail, brands, B2B and catalogue…” Source: RevenueBase Database · checked Sep 19, 2026
22	Real Agency	Strong evidence	Bournemouth, United KingdomHQ checked Sep 19, 2026	11-50	18 contacts →
	Strong evidence “Real Agency is an eCommerce design and development agency that specialises in Shopify, Magento, Adobe Commerce and BigCommerce.” Source: RevenueBase Database · checked Sep 19, 2026
23	GPMD	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	18 contacts →
	Partial evidence “Your partner in delivering ecommerce success.” Source: RevenueBase Database · checked Sep 19, 2026
24	Shopwired	Partial evidence	Birmingham, United KingdomHQ checked Sep 19, 2026	11-50	18 contacts →
	Partial evidence “ShopWired is the UK’s fastest growing ecommerce platform, powering the ecommerce websites of thousands of UK ecommerce brands from niche retailers to ecommerce giants (we’ve…” Source: RevenueBase Database · checked Sep 19, 2026
25	Autify Digital	Indirect evidence	Nottingham City, United KingdomHQ checked Sep 19, 2026	11-50	17 contacts →
	Indirect evidence “Autify Digital is one of the UK’s leading e-commerce integration and digital marketing specialists.” Source: RevenueBase Database · checked Sep 19, 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: custom ecommerce development firms. 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 custom ecommerce development firms.
Partial evidence: Its own public description names part of custom ecommerce development firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name custom ecommerce development firms. 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 510 custom ecommerce development firms based in the United Kingdom

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Custom ecommerce development firms based in the United Kingdom at a glance

As of Sep 19, 2026

6.2%Verified-email coverage

20.7Average contacts per company

1-10Median size (employees)

33.3%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

334

11-50

138

51-200

201-500

5,001-10,000

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 510 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 custom ecommerce development firms, 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 “custom ecommerce development firms”. 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 custom ecommerce development firms), 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 custom ecommerce development firms, 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, 660 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 19, 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.

Custom ecommerce development firms by metro

Custom ecommerce development firms in London170

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 custom ecommerce development firms, 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 custom ecommerce development firms are there based in the United Kingdom?

RevenueBase identified 510 custom ecommerce development firms 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?

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

Which city has the most custom ecommerce development firms?

London leads with 170 headquartered companies, followed by Birmingham (13) and Manchester (13).

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 660 verified decision-maker contacts tracked across these 510 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 19, 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.