Company lists · Data refreshed September 2026

Top 25 Data classification consulting firms based in London, United Kingdom

Name: Data classification consulting firms based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 109 companies tracked

RevenueBase identified 109 data classification consulting firms headquartered in London, United Kingdom as of September 2026 and tracks 996 professional contacts across them, including 371 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers data classification consulting firms 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 28, 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 28, 2026 86% judged on-target in blind review

109Companies

996Contacts tracked

371Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest data classification consulting firms based in London, United Kingdom

Ranked by team size

Top 25 of 109 data classification consulting firms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to data classification consulting 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	Quantzig	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	216 contacts →
	Indirect evidence “Quantzig is at the forefront of partnering with businesses to help them unlock transformative value through analytics solutions.” Source: RevenueBase Database · checked Sep 28, 2026
2	The Information LAB	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	197 contacts →
	Indirect evidence “The Information Lab is on a mission.” Source: RevenueBase Database · checked Sep 28, 2026
3	The Tecsa Group	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	66 contacts →
	Indirect evidence “Tecsa is a specialist retail loyalty and analytics consultancy founded and led by former retail executives who built and ran major loyalty programmes, including Nectar, Holland &…” Source: RevenueBase Database · checked Sep 28, 2026
4	Synapx	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	40 contacts →
	Partial evidence “Award-winning global consulting experts, blending top-tier consulting and development skills with a cross-functional team, including MVPs who are delivering cost-effective…” Source: RevenueBase Database · checked Sep 28, 2026
5	Fredward	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1,001-5,000	38 contacts →
	Indirect evidence “We have joined S&W and this profile is no longer being maintained.” Source: RevenueBase Database · checked Sep 28, 2026
6	RED Olive	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	35 contacts →
	Partial evidence “Red Olive was founded by a team of experienced Analytics, Business Intelligence and Data Management Profesionals with a love for creating tangible business improvement.” Source: RevenueBase Database · checked Sep 28, 2026
7	Beyond	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	32 contacts →
	Strong evidence “Beyond is a prominent player in the field of data analysis consultancy services and is renowned for its expertise in AI, data science, and technology consulting.” Source: RevenueBase Database · checked Sep 28, 2026
8	BI Procsi	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	30 contacts →
	Partial evidence “BI:PROCSI is a customer-focused, data-driven, highly experienced, and dedicated team of consultants delivering world-class solutions.” Source: RevenueBase Database · checked Sep 28, 2026
9	Data Reply UK	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	18 contacts →
	Partial evidence “Data Reply is the Reply group company offering a broad range of analytics and data processing services.” Source: RevenueBase Database · checked Sep 28, 2026
10	Colours Of Data	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	17 contacts →
	Partial evidence “At Colours of Data, we don’t just analyze numbers-we unlock business potential.” Source: RevenueBase Database · checked Sep 28, 2026
11	Datagene	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	16 contacts →
	Indirect evidence “We have served different business in different sectors like (Transport, Finance, Debt Management,Accounting, Media, Events etc) for over 10 years and we are happy to to have…” Source: RevenueBase Database · checked Sep 28, 2026
12	Dataobrii	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	14 contacts →
	Strong evidence “We are a high-tech consulting firm, specializing in data science, machine learning and AI-augmented Internet of Things.” Source: RevenueBase Database · checked Sep 28, 2026
13	Salient Ediscovery	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	13 contacts →
	Indirect evidence “At Salient, we pride ourselves on the diverse skill sets and extraordinary experience that enable our teams to bring invaluable insights and exceptional adaptability to each and…” Source: RevenueBase Database · checked Sep 28, 2026
14	Iqubics Technologies LLP	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	12 contacts →
	Partial evidence “At IQUBICS, we drive innovation by offering tailored Data Warehouse and Business Intelligence solutions to help companies succeed in the competitive global environment.” Source: RevenueBase Database · checked Sep 28, 2026
15	Rovy Solutions	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	11 contacts →
	Partial evidence “At Rovy Solutions, we help organizations make smarter decisions by making sense of their data.” Source: RevenueBase Database · checked Sep 28, 2026
16	Work Your Data	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	9 contacts →
	Partial evidence “We are a global data analytics consultancy.” Source: RevenueBase Database · checked Sep 28, 2026
17	Layer 9	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	7 contacts →
	Partial evidence “We are a team of experienced data people helping companies create sources of value from data to make smarter decisions to reach their business objectives.” Source: RevenueBase Database · checked Sep 28, 2026
18	J2-Reliance LTD	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	6 contacts →
	Partial evidence “At J2-Reliance, we have an obsession for transforming data and technologies into business value.” Source: RevenueBase Database · checked Sep 28, 2026
19	Vigil8 Partners Limited	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	6 contacts →
	Partial evidence “Your data is one of your most valuable, and most vulnerable, assets.” Source: RevenueBase Database · checked Sep 28, 2026
20	Aleph Insights	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	5 contacts →
	Partial evidence “Aleph Insights is a London-based data science and analytical consultancy founded in 2014.” Source: RevenueBase Database · checked Sep 28, 2026
21	Rivello LTD	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	4 contacts →
	Partial evidence “Rivello is a bespoke technology consultancy helping businesses take control of the data at the heart of their operations.” Source: RevenueBase Database · checked Sep 28, 2026
22	Data Futurists	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial evidence “At Data Futurists, we pride ourselves on being a premier data-focused consultancy.” Source: RevenueBase Database · checked Sep 28, 2026
23	Datametric	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial evidence “Datametric is a data-centric company experienced in Business Intelligence, Integration and Data Analytics.” Source: RevenueBase Database · checked Sep 28, 2026
24	Datascope Consulting & Solutions LTD	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
25	Digital Shapes	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	2 contacts →
	Partial evidence “Solutions for Success We help clients across Financial Services and High Technology sectors realise their Data Strategy and Digital Transformation journey.” Source: RevenueBase Database · checked Sep 28, 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: data classification consulting 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 data classification consulting firms.
Partial evidence: Its own public description names part of data classification consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name data classification consulting 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 109 data classification consulting firms based in London, United Kingdom

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 371 reachable decision-makers.

Free signup · no credit card

View the full list →

Data classification consulting firms based in London, United Kingdom at a glance

As of Sep 28, 2026

37.2%Verified-email coverage

9.1Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 109 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 data classification consulting 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 London, United Kingdom whose own description of what they do matches “data classification consulting 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 data classification consulting 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 data classification consulting firms, 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, 371 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 28, 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 data classification consulting 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 data classification consulting firms are there based in London, United Kingdom?

RevenueBase identified 109 data classification consulting firms 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?

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

Which city in the United Kingdom has the most data classification consulting firms?

London leads the United Kingdom with 109 headquartered companies, followed by Leeds (4) and Birmingham (3).

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 371 verified decision-maker contacts tracked across these 109 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 28, 2026.

Ready to reach these companies? Verified emails and direct dials for all 109 data classification consulting firms based in London, United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

Data classification consulting firms by geography

Browse the directory

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.