Company lists · Data refreshed September 2026

Top 25 AI customer engagement companies based in London, United Kingdom

Name: AI customer engagement companies based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 301 companies tracked

RevenueBase identified 301 AI customer engagement companies headquartered in London, United Kingdom as of September 2026 and tracks 4,563 professional contacts across them, including 1,175 with verified work emails and 208 with mobile numbers. Across the United Kingdom, London is the largest hub for this category.

This list covers AI customer engagement companies 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 20, 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 20, 2026 86% judged on-target in blind review

301Companies

4,563Contacts tracked

1,175Verified emails

208Mobile numbers

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

The 25 largest AI customer engagement companies based in London, United Kingdom

Ranked by team size

Top 25 of 301 AI customer engagement companies based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to AI customer engagement companies: 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	Quantanite	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	1,001-5,000	1,991 contacts →
	Partial evidence “We believe customers and employees should be looked after, and every interaction is an opportunity for a conversation and to learn more about them.” Source: RevenueBase Database · checked Sep 20, 2026
2	ATTIO	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	145 contacts →
	Partial evidence “Attio is the AI CRM for the next era of companies.” Source: RevenueBase Database · checked Sep 20, 2026
3	Venpep Group	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	94 contacts →
	Partial evidence “A software product development company with over 250 global customers, VenPep builds web apps, mobile apps, and SAAS applications, including its portfolio Jumbow.io & Todook.io.” Source: RevenueBase Database · checked Sep 20, 2026
4	HOOK	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	63 contacts →
	Strong evidence “Hook is building a new world for Customer Success, powered by AI.” Source: RevenueBase Database · checked Sep 20, 2026
5	Gravitas AI	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	50 contacts →
	Strong evidence “Gravitas AI is a niche artificial intelligence and blockchain company with a focus on empowering organisations to optimize productivity and enhance customer experience.” Source: RevenueBase Database · checked Sep 20, 2026
6	Digital Apple	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	47 contacts →
	Indirect evidence “Digital Apple is a full-service creative agency for B2B.” Source: RevenueBase Database · checked Sep 20, 2026
7	Gradient Labs	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	43 contacts →
	Strong evidence “Gradient Labs is the conversational AI platform transforming customer operations in financial services.” Source: RevenueBase Database · checked Sep 20, 2026
8	Rapier AI Analytics	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	39 contacts →
	Strong evidence “We are Rapier, a leading AI customer growth platform with a strong focus on transforming first-party customer data into business growth.” Source: RevenueBase Database · checked Sep 20, 2026
9	Catches	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	38 contacts →
	Strong evidence “Our goal at CATCHES is to revolutionize the customer experience, empower choice, and increase engagement with the power of AI.” Source: RevenueBase Database · checked Sep 20, 2026
10	IOVOX	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	35 contacts →
	Strong evidence “The iovox AI platform unlocks the potential of every customer conversation, from calls and texts to chats.” Source: RevenueBase Database · checked Sep 20, 2026
11	Veyn AI	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	32 contacts →
	Strong evidence “At Veyn.ai, we are at the forefront of innovation, transforming the way businesses connect with their customers through advanced Conversational AI and Generative AI technologies.” Source: RevenueBase Database · checked Sep 20, 2026
12	rocketphone.ai	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	30 contacts →
	Strong evidence “RocketPhone.ai empowers organisations to unlock the full potential of their customer conversations by transforming them into actionable insights.” Source: RevenueBase Database · checked Sep 20, 2026
13	Nanosemantics LAB	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	30 contacts →
	Indirect evidence “Over the 14 years of experience, Nanosemantics Lab has accumulated multiple technologies for human-machine communication, in addition to the vast knowledge database of dialogs in…” Source: RevenueBase Database · checked Sep 20, 2026
14	Relative Insight	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	28 contacts →
	Strong evidence “Relative Insight is the world’s leading AI-driven customer intelligence platform, helping businesses of all sizes unlock value from unstructured customer data sources.” Source: RevenueBase Database · checked Sep 20, 2026
15	Contactengine	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	22 contacts →
	Strong evidence “ContactEngine is an award-winning proactive conversational AI technology used by large corporations across industries to automate customer communications.” Source: RevenueBase Database · checked Sep 20, 2026
16	Connectiveone	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	22 contacts →
	Strong evidence “ConnectiveOne is an omnichannel AI communication platform designed to help companies deliver top-tier customer service.” Source: RevenueBase Database · checked Sep 20, 2026
17	Cloudinteract	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	20 contacts →
	Partial evidence “We build customer experience platforms and unlock your data to make customer interactions your competitive advantage.” Source: RevenueBase Database · checked Sep 20, 2026
18	Alana AI	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	20 contacts →
	Strong evidence “From pioneering AI and NLP in Latin America to achieving US$3M in sales, Alana has shaped the way brands and customers connect.” Source: RevenueBase Database · checked Sep 20, 2026
19	JAID	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	19 contacts →
	Strong evidence “Jaid is an AI-powered platform that identifies and extracts critical data from across diverse company and customer communications.” Source: RevenueBase Database · checked Sep 20, 2026
20	Mevrik	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	18 contacts →
	Strong evidence “Mevrik is an AI-powered all-in-one platform to connect, engage, and delight customers across digital channels.” Source: RevenueBase Database · checked Sep 20, 2026
21	Athena AI	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	1-10	16 contacts →
	Strong evidence “Athena AI is a no-code conversational platform that helps businesses unify customer communication across all messengers, and automate it with AI Agents that plug directly into…” Source: RevenueBase Database · checked Sep 20, 2026
22	Redmatter LTD	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	1-10	15 contacts →
	Strong evidence “Fully Autonomous Customer Experiences Our autonomous AI technology handles all customer interactions seamlessly, with no need for human agents.” Source: RevenueBase Database · checked Sep 20, 2026
23	Launched	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	1-10	15 contacts →
	Partial evidence “Launched is the future of sales and marketing, driven by Nova – the world’s first AI salesperson who truly works like a human.” Source: RevenueBase Database · checked Sep 20, 2026
24	elay.io	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	14 contacts →
	Partial evidence “elay is an engagement automation platform designed to help recruiters automate their candidate attraction and business development engagement.” Source: RevenueBase Database · checked Sep 20, 2026
25	Dynamic Messaging	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	13 contacts →
	Partial evidence “Dynamic Messaging specialise in developing bespoke automated customer communication solutions.” Source: RevenueBase Database · checked Sep 20, 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: AI customer engagement companies. 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 AI customer engagement companies.
Partial evidence: Its own public description names part of AI customer engagement companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name AI customer engagement companies. 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 301 AI customer engagement companies based in London, United Kingdom

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 1,175 reachable decision-makers.

Free signup · no credit card

View the full list →

AI customer engagement companies based in London, United Kingdom at a glance

As of Sep 20, 2026

25.8%Verified-email coverage

4.6%Mobile-number coverage

15.2Average contacts per company

1-10Median size (employees)

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

189

11-50

51-200

201-500

501-1,000

1,001-5,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 23.0d

8700–30

27731–60

1661–90

090–180

12180+

Company record updated

Median 83.0d

00–30

1,00631–60

2,21561–90

1,05590–180

287180+

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 AI customer engagement companies, 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 “AI customer engagement companies”. 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 AI customer engagement companies), 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 AI customer engagement companies, 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, 1,175 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 20, 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 AI customer engagement companies, 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 AI customer engagement companies are there based in London, United Kingdom?

RevenueBase identified 301 AI customer engagement companies 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?

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

Which city in the United Kingdom has the most AI customer engagement companies?

London leads the United Kingdom with 390 headquartered companies, followed by Manchester (25) and Edinburgh (14).

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 1,175 verified decision-maker contacts tracked across these 301 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 20, 2026.

Ready to reach these companies? Verified emails and direct dials for all 301 AI customer engagement companies based in London, United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

AI customer engagement companies 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.