Best B2B Data Providers for UK Teams (2026)

How We Assessed These Providers

This is not a ranking based on feature checklists or vendor press releases. We work with UK B2B data daily - cleaning it, enriching it, deduplicating it, and loading it into CRMs. The assessments below reflect what we actually see when working with data from each provider: accuracy rates, UK coverage gaps, compliance issues, and real-world usability.

Every provider on this list has genuine strengths. None is universally best. The right choice depends on your market, budget, team size, and how much internal capacity you have to manage data operations.

Quick Comparison

Best for UK Enterprise: ZoomInfo or Cognism

ZoomInfo remains the largest B2B database globally. For UK teams selling to enterprise accounts - FTSE 250, large multinationals, global companies with UK offices - ZoomInfo's database depth, intent data, org charts, and technographic overlays are unmatched. The platform excels when your ICP includes large, well-documented companies and you need account-level intelligence alongside contact details.

The weaknesses for UK teams: pricing starts around $15,000/year and escalates quickly; UK SME and mid-market coverage is thinner than the enterprise segment; no native TPS/CTPS screening; and the data collection model has faced GDPR scrutiny from European regulators. See our ZoomInfo alternatives for UK teams guide for the full assessment.

Cognism is the UK-native alternative. Diamond Verified mobile numbers - manually confirmed by human researchers - deliver the highest phone connect rates available for UK outbound. TPS and CTPS screening is built in, the compliance approach is designed for UK and EU regulations, and the company is London-headquartered.

The weaknesses: pricing is similar to ZoomInfo at £15,000-£25,000+ per year; coverage outside UK and Western Europe thins noticeably; no built-in sequencing or outreach tools; and the platform is a data provider rather than a full sales engagement platform. See our Cognism alternatives page for more detail.

The short version: if your market is global enterprise with UK offices, lean toward ZoomInfo. If your market is UK-focused and phone outbound is a primary channel, lean toward Cognism.

Best Budget Option: Apollo.io

Apollo.io offers the best value-for-money in B2B prospecting. The free tier gives small teams a usable starting point, and paid plans bundle contact data, email sequencing, a call dialler, and analytics into one platform at a fraction of the enterprise tools' cost.

For UK teams, Apollo is a pragmatic entry point for outbound. The sequencing tools reduce total stack cost by eliminating the need for a separate outreach platform. The database is large enough to support initial prospecting across most UK industries.

The weaknesses for UK users: email addresses are often pattern-matched rather than verified, producing 8-15% bounce rates for UK contacts; UK mobile phone coverage is inconsistent; no TPS screening; and the database skews heavily toward US companies. Apollo works as a starting tool, not a long-term UK data foundation. See our Apollo alternatives for UK teams comparison for the full picture.

Best for LinkedIn Prospecting: Kaspr or Lusha

Kaspr is the stronger option for UK and EU-focused LinkedIn prospecting. The browser extension enriches LinkedIn profiles and search results with contact details, and automated workflows can extract data from LinkedIn Sales Navigator lists. European founding means GDPR compliance is baked in, and UK/EU mobile coverage is competitive.

The weaknesses: coverage is narrower than full database platforms; no intent data or deep company intelligence; and the tool is LinkedIn-dependent - if your prospecting does not start on LinkedIn, Kaspr adds limited value.

Lusha provides similar browser extension functionality with broader but shallower coverage. The interface is slightly simpler, and brand recognition is higher. But for UK-specific data accuracy, Kaspr generally edges ahead.

The weaknesses shared by both: credit-based pricing that becomes expensive at scale; limited enrichment beyond contact details; and neither tool manages the data after it enters your CRM. See our Lusha alternatives page for a detailed comparison.

Best for Email Finding: Hunter.io

Hunter.io is the specialist email tool. Domain search identifies email addresses across a company, and the verification engine checks deliverability before you send. For UK teams running email-first outbound, Hunter's verification step materially reduces bounce rates compared to tools that serve unverified, pattern-matched addresses.

UK domain coverage is good. Hunter handles UK company email patterns effectively and the verification catches inactive or invalid addresses that broader tools miss.

The weakness is scope: Hunter is email-only. No phone numbers, no company intelligence, no sequencing (beyond basic campaigns). Teams needing a full prospecting solution will pair Hunter with other tools. But for the specific job of finding and verifying email addresses for UK companies, it is the most reliable option at its price point.

Best for Technographic Data: BuiltWith or 6sense

BuiltWith tells you what technology a company's website uses. For B2B companies selling technology products - integrations, add-ons, replacements, or competing solutions - this enables highly targeted prospecting. Find every UK company running Salesforce, identify Shopify stores using a competitor's app, or target companies using outdated technology you can replace.

The weakness: BuiltWith provides technographic data only, not contact details. You need a separate provider for emails and phone numbers. Pricing starts around $295/month, which limits it to teams with specific technographic use cases.

6sense provides technographic data alongside intent signals and account intelligence. The platform identifies accounts showing buying behaviour based on web activity, content consumption, and technology changes. For enterprise ABM teams, this combination is powerful.

The weakness: pricing starts at £30,000+ per year; UK intent signal coverage is thinner than US; and the platform requires significant setup and ongoing management. 6sense is enterprise-grade tooling that delivers exceptional results for the right team, but is overkill for most mid-market UK companies. See our technographic data glossary entry for more on this category.

Best UK Company Data: Companies House and Beauhurst

Companies House is free and comprehensive. Every UK registered company files accounts and officer information with Companies House, making it the authoritative source for UK company verification. You can confirm a company exists, check its registration status, find director names, view filed accounts, and verify registered addresses - all at no cost.

The weakness: Companies House data is compliance and registration data, not commercial intelligence. It tells you a company exists and who the directors are, but not their revenue, headcount, technology stack, or buying intent. For data verification and company validation, it is essential. For prospecting, it is a starting point, not a solution.

Beauhurst fills the gap between Companies House and international data platforms. It provides detailed intelligence on UK private companies - funding rounds, growth indicators, headcount trends, technology adoption, and market positioning. For teams targeting UK growth companies, startups, or PE/VC-backed businesses, Beauhurst offers depth that global platforms lack.

The weakness: coverage is focused on growth and innovation-oriented companies. Traditional industries and stable SMEs are less well-covered. Pricing is custom and reflects the premium positioning. For the right ICP, Beauhurst is unmatched; for broad UK prospecting, it covers a specific segment.

Best Managed Service: ClientWise

Every provider above sells data or tools. ClientWise sells the outcome: clean, enriched, CRM-ready data - sourced, verified, deduplicated, and maintained by a dedicated operations team.

We are not a data platform. We do not sell a login or a credit balance. We pull from multiple data sources - often including the providers listed above - and deliver verified records that are ready to work. We screen against TPS and CTPS, verify against Companies House, enrich from 16+ sources, and handle the ongoing hygiene that prevents data decay.

The fit is specific: ClientWise works best for B2B teams that want to invest in data quality but do not want to hire a data operations specialist or learn to operate multiple tools. If you have the internal capacity to manage data platforms effectively, the tools above may serve you well. If you want the result without the operational overhead, that is what we provide.

Start with a CRM health check if you are unsure whether you need new data sources or better management of what you already have. For teams ready to build targeted prospect lists, our pipeline build service delivers ICP-matched contacts enriched and verified for UK outbound.

How to Choose: Decision Framework

Rather than ranking these providers universally, match your decision to your specific situation.

1. What is your annual data budget? Under £2,000: Apollo or Kaspr free tiers. £2,000-£10,000: Apollo or Kaspr paid plans, possibly with Hunter for email verification. £10,000-£25,000: Cognism or ZoomInfo. Over £25,000: Enterprise platforms plus managed services or 6sense for ABM.
2. What is your primary outbound channel? Phone calls to UK prospects: Cognism, no close second. Email-first: Apollo or Hunter. LinkedIn-based: Kaspr or Lusha.
3. What is your ICP geography? UK-only: Cognism or a managed service. UK + EU: Cognism or Kaspr. UK + US: ZoomInfo or Apollo. Global: ZoomInfo.
4. Do you have someone to manage data operations? If you have a dedicated RevOps or data ops person: buy tools. If data management falls to an SDR manager or founder: consider a managed service or accept that data quality will degrade over time.
5. How important is compliance? High (regulated industry, enterprise buyers): Cognism or a managed service with full TPS/CTPS/GDPR screening. Moderate: Any EU-based provider. Low risk tolerance for compliance issues: get professional advice before choosing any data provider.

Frequently Asked Questions

Which B2B data provider has the best UK mobile phone data?

Cognism, by a meaningful margin. The Diamond Verified process uses human researchers to confirm phone numbers, and TPS/CTPS screening is built in. No other provider matches this for UK mobile data specifically.

Can I use Companies House data for sales prospecting?

You can use Companies House to verify company details, identify directors, and confirm company status. But Companies House does not provide contact email addresses, direct phone numbers, or commercial intelligence. It is best used as a verification layer alongside commercial data providers. See our guide on using Companies House data for sales.

What is the best free B2B data tool for UK teams?

Apollo's free tier offers the most functionality at no cost - limited contact searches plus basic sequencing. Kaspr and Lusha also offer free tiers with fewer monthly credits. Companies House is entirely free for company verification. None of these free options provide the data quality or volume needed for sustained outbound at scale.

Do I need multiple data providers?

Most UK teams performing serious outbound end up using at least two sources: one for contact data and one for verification or enrichment. A common mid-budget stack is Cognism or Apollo for contacts, Hunter for email verification, and Companies House for company validation. Higher-budget teams add intent data from 6sense or technographic data from BuiltWith.

Is it better to buy a data tool or hire a managed service?

If you have a RevOps professional or dedicated data person who can manage the tools, maintain data hygiene, handle deduplication, and keep the CRM clean, buying tools is usually more cost-effective. If data management is a side task for your sales team, a managed service delivers better data quality because someone is accountable full-time for the output. The worst option is buying expensive tools that nobody properly manages.