Company lists · Data refreshed September 2026

Top 20 Know your customer software companies based in the United Kingdom

Name: Know your customer software companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 4, 2026 165 companies tracked

RevenueBase identified 165 know your customer software companies headquartered in the United Kingdom as of September 2026 and tracks 6,021 professional contacts across them, including 2,863 with verified work emails and 585 with mobile numbers. London is the largest hub.

This list covers know your customer software companies 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, how directly it supports the match, and when it was last checked. Data refreshed September 4, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 Match evidence on every row Refreshed Sep 4, 2026 86% judged on-target in blind review

165Companies

6,021Contacts tracked

2,863Verified emails

585Mobile numbers

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The 20 largest know your customer software companies based in the United Kingdom

Ranked by team size

Top 20 of 165 know your customer software companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 4, 2026. Evidence rates how directly each company's own description names know your customer software companies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	GBG PLCIndirect evidence	Chester, United KingdomHQ checked Sep 4, 2026	1,001-5,000	1,204
	“GBG is the leading expert in global identity and location tech, enabling safe and rewarding digital lives for genuine people, everywhere.” Source: company website · checked Sep 4, 2026
2	YOTIIndirect evidence	London, United KingdomHQ checked Sep 4, 2026	201-500	424
	“Yoti helps businesses and people build trust with privacy-focused identity and age verification solutions.” Source: company website · checked Sep 4, 2026
3	CallsignIndirect evidence	London, United KingdomHQ checked Sep 4, 2026	51-200	249
	“Callsign is pioneering digital trust through proprietary technology that uniquely mimics the way humans identify each other in the real world.” Source: company website · checked Sep 4, 2026
4	OutseerPartial evidence	London, United KingdomHQ checked Sep 4, 2026	201-500	243
	“At Outseer, we are empowering our customers to liberate the world from digital fraud by providing solutions that stop fraud, not customers.” Source: company website · checked Sep 4, 2026
5	Synectics SolutionsIndirect evidence	Burslem, United KingdomHQ checked Sep 4, 2026	201-500	181
	“Synectics Solutions creates bespoke solutions which mitigate financial and identity fraud with outstanding effectiveness.” Source: company website · checked Sep 4, 2026
6	ThirdfortIndirect evidence	London, United KingdomHQ checked Sep 4, 2026	51-200	114
	“Thirdfort's client due diligence platform protects regulated professionals, and their clients, from fraud and money laundering.” Source: company website · checked Sep 4, 2026
7	ThemisStrong evidence	London, United KingdomHQ checked Sep 4, 2026	51-200	89
	“Know Your Risk.” Source: company website · checked Sep 4, 2026
8	AmiqusIndirect evidence	Edinburgh, United KingdomHQ checked Sep 4, 2026	51-200	76
	“Amiqus provide a staff and client onboarding compliance platform supporting organisations at scale across sectors make trusted decisions, delivered faster with greater accuracy.” Source: company website · checked Sep 4, 2026
9	KYC HUBIndirect evidence	London, United KingdomHQ checked Sep 4, 2026	51-200	71
	“Configurable, modular, and automated infrastructure for global KYC/AML compliance, fraud detection and onboarding, KYC Hub enables organizations to mitigate the risk of financial…” Source: company website · checked Sep 4, 2026
10	Mitek Systems UKIndirect evidence	London, United KingdomHQ checked Sep 4, 2026	201-500	64
	“Mitek (NASDAQ: MITK) is a global leader in mobile capture and digital identity verification solutions built on the latest advancements in AI and machine learning.” Source: company website · checked Sep 4, 2026
11	TrustidIndirect evidence	Reading, United KingdomHQ checked Sep 4, 2026	51-200	48
	“We’re TrustID, the UK’s market leader in Right to Work verification and a certified Digital Verification Service (DVS) provider.” Source: company website · checked Sep 4, 2026
12	CredasPartial evidence	Cardiff, United KingdomHQ checked Sep 4, 2026	11-50	48
	“No matter the market or sector, Credas can streamline your onboarding process using our market-leading technology to revolutionise the way you manage compliance and due diligence.” Source: company website · checked Sep 4, 2026
13	EnqualifyIndirect evidence	London, United KingdomHQ checked Sep 4, 2026	51-200	46
	“EnQualify is redefining digital onboarding with state-of-the-art AI on mobile edge technology, delivering super-fast, accurate, and fully automated onboarding in just seconds.” Source: company website · checked Sep 4, 2026
14	IdwiseIndirect evidence	London, United KingdomHQ checked Sep 4, 2026	51-200	45
	“IDWise is a Gartner Magic Quadrant–recognised, enterprise-grade identity verification and e-KYC platform purpose-built for high-risk, high-complexity emerging markets.” Source: company website · checked Sep 4, 2026
15	CheckboardIndirect evidence	London, United KingdomHQ checked Sep 4, 2026	11-50	36
	“Welcome to Checkboard, where we specialise in providing businesses with a bespoke client onboarding experience that provides relevant data and complies with AML regulations.” Source: company website · checked Sep 4, 2026
16	ONEIDIndirect evidence	Manchester, United KingdomHQ checked Sep 4, 2026	11-50	34
	“OneID® simplifies and secures the digital journeys of individuals and businesses and helps them reach their goals faster.” Source: company website · checked Sep 4, 2026
17	fraud.comPartial evidence	London, United KingdomHQ checked Sep 4, 2026	11-50	33
	“Fraud.com ensures trust at every step of the customer's digital journey; this complete end-to-end protection delivers unified identity, authentication and fraud detection and…” Source: company website · checked Sep 4, 2026
18	Synalogik Innovative Solutions LimitedIndirect evidence	United KingdomHQ checked Sep 4, 2026	51-200	29
	“SYNALOGIK delivers innovative solutions that automate intelligence and investigation processes.” Source: company website · checked Sep 4, 2026
19	SmartkycIndirect evidence	London, United KingdomHQ checked Sep 4, 2026	11-50	29
	“smartKYC’s technology drives faster, better and more cost-effective KYC at every stage of the relationship – liberating human effort to focus on decision-making rather than…” Source: company website · checked Sep 4, 2026
20	PassfortIndirect evidence	London, United KingdomHQ checked Sep 4, 2026	51-200	26
	“Passfort is a Moody's Analytics company and we are on a mission to digitally transform the way compliance professionals work.” Source: company website · checked Sep 4, 2026

Showing 20 of 165 know your customer software companies based in the United Kingdom

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Know your customer software companies based in the United Kingdom at a glance

As of Sep 4, 2026

11-50Median size (employees)

LondonLargest hub · 103 HQs

585Contacts with mobile numbers

Sep 4, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Verified emails by last verification

0–30

31–60

224

61–90

1,517

90–180

1,102

180+

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 know your customer software companies, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “know your customer software companies”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among know your customer software companies, 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 an evidence 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, 2,863 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 4, 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.

Know your customer software companies by metro

Know your customer software companies in London103

Frequently asked

How many know your customer software companies are there based in the United Kingdom?

RevenueBase identified 165 know your customer software companies 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?

GBG PLC, headquartered in Chester, tops this list with the largest team on record.

Which city has the most know your customer software companies?

London leads with 103 headquartered companies, followed by Manchester (4) and Cardiff (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 2,863 verified decision-maker contacts tracked across these 165 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 4, 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 SmartSearch, 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.