Company lists · Data refreshed September 2026

Top 25 Customer messaging platforms based in the United Kingdom

Name: Customer messaging platforms based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 1, 2026 262 companies tracked

RevenueBase identified 262 customer messaging platforms headquartered in the United Kingdom as of September 2026 and tracks 8,576 professional contacts across them, including 3,500 with verified work emails and 2,026 with mobile numbers. London is the largest hub.

This list covers customer messaging platforms 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 1, 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 RevenueBase Smart Search rating on every row Refreshed Sep 1, 2026 86% judged on-target in blind review

262Companies

8,576Contacts tracked

3,500Verified emails

2,026Mobile numbers

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The 25 largest customer messaging platforms based in the United Kingdom

Ranked by team size

Top 25 of 262 customer messaging platforms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 1, 2026. RevenueBase Smart Search rates how each company's information relates to customer messaging platforms: 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	BRAZE	Strong evidence	London, United Kingdom	1,001-5,000	2,133 contacts →
	Strong evidence “Braze is the leading customer engagement platform that empowers brands to Be Absolutely Engaging.™ Braze allows any marketer to collect and take action on any amount of data from…” Source: RevenueBase Database · checked Sep 1, 2026
2	Attentive	Partial evidence	London, United Kingdom	1,001-5,000	1,328 contacts →
	Partial evidence “Attentive® knows personalized customer experiences require both powerful technology and the right people behind it.” Source: RevenueBase Database · checked Sep 1, 2026
3	RESQ	Partial evidence	Seaham, United Kingdom	1,001-5,000	493 contacts →
	Partial evidence “Give your customers a voice with ResQ.” Source: RevenueBase Database · checked Sep 1, 2026
4	Symphony	Strong evidence	Belfast, United Kingdom	201-500	489 contacts →
	Strong evidence “Symphony is an AI-powered communication and technology company fueled by interconnected platforms: Messaging, Voice, Directory and Analytics.” Source: RevenueBase Database · checked Sep 1, 2026
5	Imimobile Part Of Webex	Indirect evidence	London, United Kingdom	1,001-5,000	436 contacts →
	Indirect evidence “We've moved!” Source: RevenueBase Database · checked Sep 1, 2026
6	Decagon	Strong evidence	London, United Kingdom	201-500	290 contacts →
	Strong evidence “Decagon is the leading conversational AI platform empowering every brand to deliver concierge customer experiences.” Source: RevenueBase Database · checked Sep 1, 2026
7	Kaleyra	Partial evidence	London, United Kingdom	501-1,000	241 contacts →
	Partial evidence “Tata Communications Kaleyra™ connects every conversation, between enterprise teams and customers, through our Interaction Fabric.” Source: RevenueBase Database · checked Sep 1, 2026
8	Vocalcom	Partial evidence	Uk, United Kingdom	201-500	233 contacts →
	Partial evidence “Vocalcom enables faster value realization by orchestrating end-to-end customer experiences across all channels, combining human with AI-agents.” Source: RevenueBase Database · checked Sep 1, 2026
9	Leapxpert	Indirect evidence	United Kingdom	51-200	177 contacts →
	Indirect evidence “LeapXpert is the leader in Responsible Business Communication.” Source: RevenueBase Database · checked Sep 1, 2026
10	Luware	Indirect evidence	London, United Kingdom	51-200	154 contacts →
	Indirect evidence “Luware builds intelligent, cloud-native CX solutions that unlock the full potential of Microsoft Teams for enterprise communication.” Source: RevenueBase Database · checked Sep 1, 2026
11	DIXA	Strong evidence	London, United Kingdom	51-200	141 contacts →
	Strong evidence “Dixa is an agentic customer service platform that helps leading e-commerce brands increase operational efficiency and deliver faster and better customer experiences.” Source: RevenueBase Database · checked Sep 1, 2026
12	Route 101 LTD	Partial evidence	Bristol, United Kingdom	51-200	135 contacts →
	Partial evidence “Route 101 offers award-winning customer engagement solutions that help you reduce operational costs, enhance efficiency, and deliver a next-generation customer experience (CX).” Source: RevenueBase Database · checked Sep 1, 2026
13	Daktela	Indirect evidence	Chester, United Kingdom	51-200	98 contacts →
	Indirect evidence “Daktela is all-in-one contact center solution perfectly suited for small and mid-size businesses.” Source: RevenueBase Database · checked Sep 1, 2026
14	Goodays	Strong evidence	London, United Kingdom	51-200	92 contacts →
	Strong evidence “Goodays (formerly Critizr) is the most comprehensive customer experience platform on the market, now enhanced with generative AI.” Source: RevenueBase Database · checked Sep 1, 2026
15	Signal	Partial evidence	Cheltenham, United Kingdom	51-200	84 contacts →
	Partial evidence “Signal, a Broadridge Company, is a UK customer communications specialist trusted by leading enterprises in the banking, insurance and social sectors to accelerate digital…” Source: RevenueBase Database · checked Sep 1, 2026
16	engagely.ai	Strong evidence	Watford, United Kingdom	51-200	78 contacts →
	Strong evidence “Engagely.ai is a leading No code total CX Platform with out-of-the-box CX automation solutions that helps enterprises automate customer support and engagement & thereby creates…” Source: RevenueBase Database · checked Sep 1, 2026
17	Cloudcall	Indirect evidence	Leicester, United Kingdom	51-200	75 contacts →
	Indirect evidence “CloudCall helps recruitment and sales teams connect faster, smarter, and with more context, directly inside their CRM.” Source: RevenueBase Database · checked Sep 1, 2026
18	EDESK	Partial evidence	London, United Kingdom	51-200	64 contacts →
	Partial evidence “Intelligent customer engagement and extraordinary support for eCommerce sellers, everywhere they sell.” Source: RevenueBase Database · checked Sep 1, 2026
19	Nebula	Strong evidence	Guildford, United Kingdom	51-200	60 contacts →
	Strong evidence “Nebula is a leading SaaS provider of workplace communications software, delivering powerful, secure, and adaptable solutions and applications for voice, messaging, customer…” Source: RevenueBase Database · checked Sep 1, 2026
20	Textmagic	Strong evidence	Romford, United Kingdom	51-200	54 contacts →
	Strong evidence “Textmagic is the operational messaging platform trusted by over companies worldwide that brings all business communication into one place.” Source: RevenueBase Database · checked Sep 1, 2026
21	Teleware PLC	Partial evidence	Easingwold, United Kingdom	51-200	49 contacts →
	Partial evidence “TeleWare design software to help businesses communicate better with their customers and employees by routing communications more effectively.” Source: RevenueBase Database · checked Sep 1, 2026
22	Telogo Communications LTD	Indirect evidence	London, United Kingdom	51-200	35 contacts →
	Indirect evidence “At Telogo, we are redefining the way the world connects.” Source: RevenueBase Database · checked Sep 1, 2026
23	Bringo	Strong evidence	London, United Kingdom	51-200	33 contacts →
	Strong evidence “We are here to make your digital customer engagement simple yet robust through our range of powerful, fast and secure channels including our own unique platform that allows us to…” Source: RevenueBase Database · checked Sep 1, 2026
24	Mission Labs	Indirect evidence	Manchester, United Kingdom	51-200	29 contacts →
	Indirect evidence “At Mission Labs we have a single vision: to power the future of business communications.” Source: RevenueBase Database · checked Sep 1, 2026
25	Nanosemantics LAB	Indirect evidence	London, United Kingdom	51-200	29 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 1, 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: customer messaging platforms. 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 customer messaging platforms.
Partial evidence: Its own public description names part of customer messaging platforms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name customer messaging platforms. 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 262 customer messaging platforms based in the United Kingdom

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Customer messaging platforms based in the United Kingdom at a glance

As of Sep 1, 2026

40.8%Verified-email coverage

23.6%Mobile-number coverage

32.7Average contacts per company

1-10Median size (employees)

46.2%Largest-city concentration · London

Sep 1, 2026Page data refreshed

Companies by employee count

1-10

136

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

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 customer messaging platforms, 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 the United Kingdom whose own description of what they do matches “customer messaging platforms”. 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 customer messaging platforms), 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 customer messaging platforms, 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 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, 3,500 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 1, 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.

Customer messaging platforms by metro

Customer messaging platforms in London121

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 customer messaging platforms, 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 customer messaging platforms are there based in the United Kingdom?

RevenueBase identified 262 customer messaging platforms 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?

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

Which city has the most customer messaging platforms?

London leads with 121 headquartered companies, followed by Manchester (9) and Bristol (4).

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 3,500 verified decision-maker contacts tracked across these 262 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 1, 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.