Company lists · Data refreshed September 2026

Top 25 Custom ecommerce developers based in London, United Kingdom

Name: Custom ecommerce developers based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 439 companies tracked

RevenueBase identified 439 custom ecommerce developers headquartered in London, United Kingdom as of September 2026 and tracks 11,640 professional contacts across them, including 1,041 with verified work emails. London is the largest hub.

This list covers custom ecommerce developers 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 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

439Companies

11,640Contacts tracked

1,041Verified emails

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The 25 largest custom ecommerce developers based in London, United Kingdom

Ranked by team size

Top 25 of 439 custom ecommerce developers based in London, 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 developers: 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	VTEX	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	1,001-5,000	1,308 contacts →
	Indirect evidence “VTEX (NYSE: VTEX) is the composable and complete commerce platform that delivers more efficiency and less maintenance to organizations seeking to make smarter IT investments and…” Source: RevenueBase Database · checked Sep 19, 2026
2	VENDA	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	201-500	225 contacts →
	Indirect evidence “Venda is one of the world’s leading innovators and providers of digital commerce solutions, leveraged by almost 100 manufacturers and retailers to deliver a consistent brand…” Source: RevenueBase Database · checked Sep 19, 2026
3	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
4	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
5	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
6	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
7	Vervaunt	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	68 contacts →
	Partial evidence “Vervaunt is a forward-thinking eCommerce consultancy and marketing agency, collaborating with the most ambitious and pioneering brands in the industry across full funnel…” Source: RevenueBase Database · checked Sep 19, 2026
8	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
9	Eastside CO Shopify Platinum Agency	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	47 contacts →
	Partial evidence “Award-winning ecommerce agency Eastside is one of the world’s most experienced Shopify Platinum Partners.” Source: RevenueBase Database · checked Sep 19, 2026
10	Extreme Branding	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	45 contacts →
	Indirect evidence “Want to Hire?” Source: RevenueBase Database · checked Sep 19, 2026
11	Wunderman Thompson Commerce & Technology	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	1,001-5,000	44 contacts →
	Indirect evidence “At Wunderman Thompson Commerce & Technology, we exist to inspire growth for ambitious retailers and brands.” Source: RevenueBase Database · checked Sep 19, 2026
12	Limesharp	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	37 contacts →
	Partial evidence “Limesharp is an eCommerce agency specialising in designing and building digital flagship stores for brands with offices in both London & Auckland.” Source: RevenueBase Database · checked Sep 19, 2026
13	RVS Media LTD	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	36 contacts →
	Partial evidence “RVS Media is an established creative eCommerce development company based in London.” Source: RevenueBase Database · checked Sep 19, 2026
14	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
15	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
16	Future Platforms	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	31 contacts →
	Indirect evidence “Future Platforms helps businesses take (big) leaps forwards, fast.” Source: RevenueBase Database · checked Sep 19, 2026
17	SOON	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	31 contacts →
	Partial evidence “We are an award-winning digital product and eCommerce business providing high-quality, bespoke web-based solutions that revolutionise businesses.” Source: RevenueBase Database · checked Sep 19, 2026
18	Charle Agency	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	21 contacts →
	Strong evidence “As a Shopify Partner and an expert ecommerce web design agency formed of designers and developers, we help brands profit from the power of strategic website design and powerful…” Source: RevenueBase Database · checked Sep 19, 2026
19	Infovinity Systems Pvt. Limited	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	21 contacts →
	Indirect 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
20	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
21	The Barn	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	1-10	18 contacts →
	Partial evidence “We are a strategic and creative eCommerce agency specialising in Shopify eCommerce, branding, and growth.” Source: RevenueBase Database · checked Sep 19, 2026
22	Websupport	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	1-10	16 contacts →
	Indirect evidence “Digital Commerce & Transformation - We build intelligent online solutions for businesses, education sector and local authorities.” Source: RevenueBase Database · checked Sep 19, 2026
23	Ellicode By Brainlab Studio	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	14 contacts →
	Indirect evidence “Ellicode – High-Performing E-Commerce & B2B Web Solutions.” Source: RevenueBase Database · checked Sep 19, 2026
24	Cabiri	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	13 contacts →
	Indirect evidence “There is no substitute for experience, and we appreciate that you wouldn’t want to risk your business by partnering with a team who are doing this for the first time.” Source: RevenueBase Database · checked Sep 19, 2026
25	Westum	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	12 contacts →
	Indirect evidence “Westum is a full service agency entirely focused on E.Commerce.” 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 developers. 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 developers.
Partial evidence: Its own public description names part of custom ecommerce developers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name custom ecommerce developers. 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 439 custom ecommerce developers based in London, United Kingdom

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Custom ecommerce developers based in London, United Kingdom at a glance

As of Sep 19, 2026

8.9%Verified-email coverage

26.5Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

280

11-50

117

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 439 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 developers, 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 “custom ecommerce developers”. 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 developers), 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 developers, 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, 1,041 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 developers by metro in the United Kingdom

Custom ecommerce developers in London439
Custom ecommerce developers in Manchester44
Custom ecommerce developers in Leeds28
Custom ecommerce developers in Birmingham27

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 developers, 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 developers are there based in London, United Kingdom?

RevenueBase identified 439 custom ecommerce developers 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?

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

Which city has the most custom ecommerce developers?

London leads with 439 headquartered companies, followed by Manchester (44) and Leeds (28).

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 1,041 verified decision-maker contacts tracked across these 439 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.