Company lists · Data refreshed September 2026

Top 25 Compliance outsourcing law firms based in London, United Kingdom

Name: Compliance outsourcing law 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 27, 2026 68 companies tracked

RevenueBase identified 68 compliance outsourcing law firms headquartered in London, United Kingdom as of September 2026 and tracks 850 professional contacts across them, including 363 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers compliance outsourcing law 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 27, 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 27, 2026 86% judged on-target in blind review

68Companies

850Contacts tracked

363Verified emails

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The 25 largest compliance outsourcing law firms based in London, United Kingdom

Ranked by team size

Top 25 of 68 compliance outsourcing law firms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to compliance outsourcing law 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	GI Outsourcing	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	201-500	311 contacts →
	Partial evidence “GI Outsourcing is a UK-based accountants outsourcing firm.” Source: RevenueBase Database · checked Sep 27, 2026
2	Konexo	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	51-200	171 contacts →
	Partial evidence “Alternative legal and compliance services developed by Eversheds Sutherland.” Source: RevenueBase Database · checked Sep 27, 2026
3	The Legal Director	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	60 contacts →
	Indirect evidence “We are a legal consultancy that provides businesses with experienced, high-calibre lawyers on a part-time, retained basis as your in-house lawyer.” Source: RevenueBase Database · checked Sep 27, 2026
4	Complyport	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	51-200	36 contacts →
	Indirect evidence “Welcome to Complyport - member of ComplyMAP Group!” Source: RevenueBase Database · checked Sep 27, 2026
5	Paralaw A Consilio Company	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	51-200	27 contacts →
	Indirect evidence “Now part of the Lawyers on Demand offering within the broader Consilio family.” Source: RevenueBase Database · checked Sep 27, 2026
6	Constantine LAW	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	25 contacts →
	Indirect evidence “We provide Employment and Regulatory Solutions at Work.” Source: RevenueBase Database · checked Sep 27, 2026
7	Reg-1	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	1-10	19 contacts →
	Partial evidence “Reg-1 is a Compliance as a Service (CaaS) platform which aims to augment existing compliance teams with a real-time compliance dashboard helping consolidate a firm's assesisment…” Source: RevenueBase Database · checked Sep 27, 2026
8	Rule LTD	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	51-200	15 contacts →
	Partial evidence “RULE LIMITED provides managed legal and compliance services.” Source: RevenueBase Database · checked Sep 27, 2026
9	1rs- 1st Risk Solutions	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	13 contacts →
	Partial 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 27, 2026
10	AJ FOX Compliance	Strong evidence	London, United KingdomHQ checked Sep 27, 2026	1-10	12 contacts →
	Strong evidence “AJ Fox Compliance is a Careers and Recruitment Consultancy for Law Firm Risk & Compliance Professionals working across the UK and internationally.” Source: RevenueBase Database · checked Sep 27, 2026
11	Comsura	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	1-10	7 contacts →
	Partial evidence “Comsura is a compliance consultancy for regulated firms.” Source: RevenueBase Database · checked Sep 27, 2026
12	Complia	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	1-10	7 contacts →
	Partial evidence “Complia offers innovative RegTech solutions - Agents and expert regulatory compliance consulting, helping businesses navigate complex regulations efficiently.” Source: RevenueBase Database · checked Sep 27, 2026
13	Compliance On Demand	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	1-10	6 contacts →
	Partial evidence “Compliance on Demand is a boutique consultancy for both regulated and unregulated businesses operating primarily in the real estate sector, but also general corporate and…” Source: RevenueBase Database · checked Sep 27, 2026
14	Kyc4u	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	1-10	6 contacts →
	Indirect evidence “We will do the AML checks on your clients and counterparty for you so you can focus on your business.” Source: RevenueBase Database · checked Sep 27, 2026
15	Oyster Shield	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	1-10	5 contacts →
	Partial evidence “We provide tailor-made corporate and legal managed solutions Our team helps clients transform legal and compliance processes to drive cost-effective and innovative legal and ESG…” Source: RevenueBase Database · checked Sep 27, 2026
16	Cassadys Solicitors	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	1-10	5 contacts →
	Partial evidence “Cassadys is a law firm which is fast gaining prominence as a niche provider of legal services across various sectors.” Source: RevenueBase Database · checked Sep 27, 2026
17	RTM Business Consulting	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	4 contacts →
	Indirect evidence “Every day the regulatory environment in which big business operates becomes more complex and more challenging.” Source: RevenueBase Database · checked Sep 27, 2026
18	Baron Crawford Search	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	1-10	2 contacts →
	Indirect evidence “BaronCrawford was founded by Rob Baron and Guy Crawford, both of whom have gained substantial experience specialising solely in in-house recruitment.” Source: RevenueBase Database · checked Sep 27, 2026
19	MCM Compliance Consultants	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	1-10	2 contacts →
	Partial evidence “At MCM Compliance, we take the time to develop a detailed understanding of our client's business model and risk profiles to enable us to tailor our advice, guidance and support.” Source: RevenueBase Database · checked Sep 27, 2026
20	Florit Legal In-House Legal & Compliance Recruitment	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	1-10	2 contacts →
	Indirect evidence “Florit Legal helps companies headhunt and recruit in-house lawyers across the UK.” Source: RevenueBase Database · checked Sep 27, 2026
21	London Registrars LTD	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	11-50	2 contacts →
	Partial evidence “London Registrars Ltd is a firm specialising in corporate governance, risk and compliance services and offering legal and business advice to all types of organisations.” Source: RevenueBase Database · checked Sep 27, 2026
22	First Legal Recruitment	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	1-10	2 contacts →
	Partial evidence “First Legal Recruitment specialises in the recruitment of paralegal, document review, eDisclosure and compliance staff.” Source: RevenueBase Database · checked Sep 27, 2026
23	dorhyan.eu	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	1-10	2 contacts →
	Partial evidence “Dorhyan.eu is built for one thing: compliant cross-border fund distribution in Europe and beyond.” Source: RevenueBase Database · checked Sep 27, 2026
24	Tetractys Partners LLP	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	1-10	1 contacts →
	Partial evidence “Website temporarily down for maintenance* Tetractys Partners LLP is a compliance consultancy specialising in financial services regulatory compliance and general corporate…” Source: RevenueBase Database · checked Sep 27, 2026
25	Waypoint GRC	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	1-10	1 contacts →
	Partial evidence “Choosing and implementing the best solutions to build the optimal programme with positive, measurable outcomes is a challenge for any compliance team.” Source: RevenueBase Database · checked Sep 27, 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: compliance outsourcing law 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 compliance outsourcing law firms.
Partial evidence: Its own public description names part of compliance outsourcing law firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name compliance outsourcing law 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 68 compliance outsourcing law firms based in London, United Kingdom

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Compliance outsourcing law firms based in London, United Kingdom at a glance

As of Sep 27, 2026

42.7%Verified-email coverage

12.5Average contacts per company

1-10Median size (employees)

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 68 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 compliance outsourcing law 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 “compliance outsourcing law 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 compliance outsourcing law 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 compliance outsourcing law 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, 363 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 27, 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 compliance outsourcing law 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 compliance outsourcing law firms are there based in London, United Kingdom?

RevenueBase identified 68 compliance outsourcing law 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?

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

Which city in the United Kingdom has the most compliance outsourcing law firms?

London leads the United Kingdom with 68 headquartered companies, followed by Manchester (11) and Birmingham (5).

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 363 verified decision-maker contacts tracked across these 68 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 27, 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.