Company lists · Data refreshed September 2026

Top 25 Regulatory compliance accounting firms based in London, United Kingdom

Name: Regulatory compliance accounting 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 29, 2026 293 companies tracked

RevenueBase identified 293 regulatory compliance accounting firms headquartered in London, United Kingdom as of September 2026 and tracks 2,152 professional contacts across them, including 706 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers regulatory compliance accounting 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 29, 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 29, 2026 86% judged on-target in blind review

293Companies

2,152Contacts tracked

706Verified emails

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

The 25 largest regulatory compliance accounting firms based in London, United Kingdom

Ranked by team size

Top 25 of 293 regulatory compliance accounting firms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to regulatory compliance accounting 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	Konexo	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	171 contacts →
	Partial evidence “Alternative legal and compliance services developed by Eversheds Sutherland.” Source: RevenueBase Database · checked Sep 29, 2026
2	Novatus	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	102 contacts →
	Partial evidence “We enable financial services firms to meet their most complex regulatory requirements through specialist technology and expert-led advisory services.” Source: RevenueBase Database · checked Sep 29, 2026
3	Thistle Initiatives	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	76 contacts →
	Strong evidence “Thistle Initiatives is an award‑winning management consultancy specialising in regulatory compliance, financial crime and business transformation.” Source: RevenueBase Database · checked Sep 29, 2026
4	Aptivaa	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	74 contacts →
	Partial evidence “Aptivaa is a vertically focused risk and compliance professional services firm delivering risk management solutions to the global financial services industry.” Source: RevenueBase Database · checked Sep 29, 2026
5	Cosegic	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	67 contacts →
	Partial evidence “Cosegic is the Compliance Partner to the world’s most competitive organisations.” Source: RevenueBase Database · checked Sep 29, 2026
6	Aperio Intelligence	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	58 contacts →
	Indirect evidence “Aperio Intelligence is an independent, integrity risk consultancy headquartered in the City of London.” Source: RevenueBase Database · checked Sep 29, 2026
7	Lysis Group	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	38 contacts →
	Partial evidence “Since 2001, Lysis Group has established itself as a global leader in the field of Financial Crime (FC) compliance.” Source: RevenueBase Database · checked Sep 29, 2026
8	Complyport	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	36 contacts →
	Indirect evidence “Welcome to Complyport - member of ComplyMAP Group!” Source: RevenueBase Database · checked Sep 29, 2026
9	Broadgate	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	34 contacts →
	Indirect evidence “Our expert consultants help regulated businesses navigate a changing world with confidence.” Source: RevenueBase Database · checked Sep 29, 2026
10	RQC Group	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	34 contacts →
	Partial evidence “RQC Group is an industry-leading financial compliance consultancy with offices in London and New York, specialising in FCA, SEC and CFTC/NFA Compliance Consulting, Investment…” Source: RevenueBase Database · checked Sep 29, 2026
11	KBM Group	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	26 contacts →
	Indirect evidence “KBM Group was founded as a Chartered Certified Accountancy firm, offering advisory and consulting services for business start-ups and organizations looking to strengthen their…” Source: RevenueBase Database · checked Sep 29, 2026
12	Avyse Partners	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	24 contacts →
	Strong evidence “Purpose led regulatory consultants specialising in financial crime prevention, conduct, compliance and ESG.” Source: RevenueBase Database · checked Sep 29, 2026
13	Addition Compliance	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	24 contacts →
	Partial evidence “We are an independent, fully managed regulatory reporting service, trusted by financial institutions for the accuracy, expertise, and personal service demanded by an evolving…” Source: RevenueBase Database · checked Sep 29, 2026
14	Howlader & CO	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	23 contacts →
	Indirect evidence “We are an award-winning firm of chartered accountants whose friendly, fast and reliable service has seen our client base grow as quickly as our reputation.” Source: RevenueBase Database · checked Sep 29, 2026
15	EA Chartered Accountants	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	22 contacts →
	Indirect evidence “Our purpose is to enable individuals and businesses to maximise their financial potential.” Source: RevenueBase Database · checked Sep 29, 2026
16	Sicsic Advisory	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	21 contacts →
	Partial evidence “Sicsic Advisory is a leading strategic regulatory and risk consultancy, supporting financial services firms to build and grow sustainable businesses.” Source: RevenueBase Database · checked Sep 29, 2026
17	Consultants Factory	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	20 contacts →
	Indirect evidence “We at CF assist enterprises manage IT risks better.” Source: RevenueBase Database · checked Sep 29, 2026
18	Walden WAY & CO	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	20 contacts →
	Indirect evidence “We are a firm of Chartered Certified Accountants and Registered Auditors.” Source: RevenueBase Database · checked Sep 29, 2026
19	Mirador Solutions Consultancy	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	17 contacts →
	Indirect evidence “Trusted Partner to the Financial Services From the business, to your business Mirador Solutions Consultancy is a trusted and strategic partner for financial services firms, with…” Source: RevenueBase Database · checked Sep 29, 2026
20	GRATH	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	15 contacts →
	Strong evidence “Effortlessly scale your oversight capabilities with the industry's most intuitive regulatory compliance platform.” Source: RevenueBase Database · checked Sep 29, 2026
21	Towerhouse LLP	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	14 contacts →
	Indirect evidence “A small organisation helping our clients to have a big impact.” Source: RevenueBase Database · checked Sep 29, 2026
22	Complycraft Consulting	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	14 contacts →
	Partial evidence “We are an independent (employee owned) compliance consultancy providing services to FCA regulated firms and to other compliance consultancies.” Source: RevenueBase Database · checked Sep 29, 2026
23	The Association Of Professional Compliance Consultants	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	14 contacts →
	Partial evidence “Offering A Clearer Perspective The Association Of Professional Compliance Consultants, or APCC, is the membership organisation for compliance consultants who advise firms who are…” Source: RevenueBase Database · checked Sep 29, 2026
24	Salient Ediscovery	Indirect evidence	London, United KingdomHQ checked Sep 29, 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 29, 2026
25	1rs- 1st Risk Solutions	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	13 contacts →
	Strong evidence “1st Risk Solutions is a risk and compliance specialist firm providing pragmatic, effective solutions to enterprise risk management and regulatory requirements.” Source: RevenueBase Database · checked Sep 29, 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: regulatory compliance accounting 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 regulatory compliance accounting firms.
Partial evidence: Its own public description names part of regulatory compliance accounting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name regulatory compliance accounting 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 293 regulatory compliance accounting 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 706 reachable decision-makers.

Free signup · no credit card

View the full list →

Regulatory compliance accounting firms based in London, United Kingdom at a glance

As of Sep 29, 2026

32.8%Verified-email coverage

7.3Average contacts per company

1-10Median size (employees)

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

202

11-50

51-200

201-500

501-1,000

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 293 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 regulatory compliance accounting 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 “regulatory compliance accounting 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 regulatory compliance accounting 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 regulatory compliance accounting 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, 706 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 29, 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 regulatory compliance accounting 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 regulatory compliance accounting firms are there based in London, United Kingdom?

RevenueBase identified 293 regulatory compliance accounting 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?

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

Which city in the United Kingdom has the most regulatory compliance accounting firms?

London leads the United Kingdom with 293 headquartered companies, followed by Manchester (21) and Birmingham (17).

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 706 verified decision-maker contacts tracked across these 293 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 29, 2026.

Ready to reach these companies? Verified emails and direct dials for all 293 regulatory compliance accounting firms based in London, United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

Regulatory compliance accounting 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.