Company lists · Data refreshed September 2026
Top 25 B2B CRM cleanup services based in the United Kingdom
RevenueBase identified 104 B2B CRM cleanup services headquartered in the United Kingdom as of September 2026 and tracks 828 professional contacts across them, including 264 with verified work emails and 39 with mobile numbers. London is the largest hub.
This list covers B2B CRM cleanup services 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 2, 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.
The 25 largest B2B CRM cleanup services based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 83 | ||||
“We're an award-winning CRM agency who specialise in knitting together complex and disparate data to create a powerful single customer view that can deliver significant returns to…” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 2 | 45 | ||||
“With over three decades of experience, we partner with B2B sales and marketing teams to drive and nurture new customer acquisition - securing conversations with the right…” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 3 | 38 | ||||
“Highly qualified B2B Sales Appointments you can trust.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 4 | 35 | ||||
“LeadScale provides the greatest leverage to any business – the ability to use personal data to identify more opportunities earlier, driving revenue at scale.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 5 | Fusion IntegrationIndirect evidence | 35 | |||
“We specialise in putting just the right health-care contacts directly in the hands of your sales professionals.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 6 | Prosales GroupIndirect evidence | 30 | |||
Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 7 | 28 | ||||
“Generating high-quality B2B sales leads for your business!” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 8 | 24 | ||||
“When you don't trust your CRM, your systems don't talk to each other, and your reports are nonsense, it's time to call SpotDev.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 9 | 18 | ||||
“Acquirz is revolutionising the UK’s B2B data landscape with our fresh, innovative, and comprehensive approach.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 10 | 16 | ||||
“Is disconnected data slowing your business down?” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 11 | 15 | ||||
“At Loncom Consulting, we transform data into strategy and strategy into growth.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 12 | 13 | ||||
“DQ Global is a data quality management company with a mission to empower organisations worldwide to achieve more with their customer data.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 13 | 12 | ||||
“Restoring your faith in data - We’re a B2B- Data Services Agency with a difference.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 14 | The Tracing GroupIndirect evidence | 12 | |||
“We know that the relationship with your customers is vital.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 15 | 11 | ||||
“The Cara Difference…your partners in business growth.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 16 | Migrate Data LTDPartial evidence | 10 | |||
“Over the last 20 years Migrate has grown into a Data Services company specializing in Data Migration to Salesforce and extensive Data Cleansing.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 17 | 10 | ||||
“Cardwell Marketing provides businesses with database marketing solutions.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 18 | 9 | ||||
“The Pretectum CMDM platform an MDM for customer data, provides an approach to customer master data management that affords you unified lensed views of your customers and business…” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 19 | More Than Words Marketing LimitedPartial evidence | 8 | |||
“At More Than Words Marketing, we offer a comprehensive range of B2B marketing services to help businesses achieve their marketing goals.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 20 | 6 | ||||
“Data Planning - We take the headaches away from your data planning and buying Email Marketing - Creative Broadcast enables you to directly target your key audience via email…” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 21 | 6 | ||||
“Welcome to Tempest Cosgrave, a specialist agency generating leads, appointments and clean data for businesses since 2001.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 22 | 5 ElevenIndirect evidence | 5 | |||
“We work with you, to figure out exactly what works for you.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 23 | 5 | ||||
“Email: info@guruaxis.com GuruAxis is a B2B outreach agency founded in 2010.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 24 | Marketing List LTDPartial evidence | 4 | |||
“Marketing Lists – We Provide and Cleanse Marketing Data Data Supply Create & Customise Bespoke Marketing Lists.” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
| 25 | Junglebeat MarketingIndirect evidence | 3 | |||
“Do you need help with generating sales leads and appointments?” Source: company website · checked Sep 2, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 104 B2B CRM cleanup services based in the United Kingdom
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B2B CRM cleanup services based in the United Kingdom at a glance
As of Sep 2, 2026Companies by employee count
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 B2B CRM cleanup services, 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 “B2B CRM cleanup services”. 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 B2B CRM cleanup services, 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, 264 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 2, 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.
B2B CRM cleanup services by metro
- B2B CRM cleanup services in London30
Frequently asked
How many B2B CRM cleanup services are there based in the United Kingdom?
RevenueBase identified 104 B2B CRM cleanup services 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?
Acteol, headquartered in London, tops this list with the largest team on record.
Which city has the most B2B CRM cleanup services?
London leads with 30 headquartered companies, followed by Bristol (4) and Bournemouth (2).
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 264 verified decision-maker contacts tracked across these 104 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 2, 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.
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