Which B2B provider has the best UK mobile numbers?

Cognism, for verified UK mobiles. Its "Diamond" data is phone-verified (a person has called the number and confirmed the contact), which lifts connect rates above databases of guessed or scraped numbers. Kaspr and Lusha are cheaper self-serve alternatives with solid UK coverage.

What's the difference between a direct dial and a mobile number?

A direct dial reaches a person's desk or extension without going through a switchboard; a mobile number reaches their cell phone. Mobiles are usually more valuable for outbound because they reach the person directly, but they're also harder to source accurately.

Is it legal to use a bought UK mobile number database for cold calling?

You can hold the data under legitimate interest, but before making live marketing calls you must screen numbers against the TPS and CTPS registers, and automated calls need consent even for businesses. See our guide on whether buying B2B data is legal in the UK.

Which B2B provider has the best UK mobile numbers?

Cognism, for verified UK mobiles. Its "Diamond" data is phone-verified (a person has called the number and confirmed the contact), which lifts connect rates above databases of guessed or scraped numbers. Kaspr and Lusha are cheaper self-serve alternatives with solid UK coverage.

What's the difference between a direct dial and a mobile number?

A direct dial reaches a person's desk or extension without going through a switchboard; a mobile number reaches their cell phone. Mobiles are usually more valuable for outbound because they reach the person directly, but they're also harder to source accurately.

Is it legal to use a bought UK mobile number database for cold calling?

You can hold the data under legitimate interest, but before making live marketing calls you must screen numbers against the TPS and CTPS registers, and automated calls need consent even for businesses. See our guide on whether buying B2B data is legal in the UK.

Ranked · UK · Updated June 2026

The best B2B mobile number databases for UK teams

In short

For UK mobile and direct-dial data, Cognism leads: its phone-verified "Diamond" numbers are built to connect, and UK coverage is the deepest in the category. Kaspr and Lusha are cheaper, self-serve routes to UK mobiles; ZoomInfo and Apollo carry volume but skew US. Here's how the five compare.

1

Cognism

GDPR-first sales intelligence with phone-verified mobile numbers, strongest across the UK & EMEA.

8.1 /10

Phone-verified Diamond mobiles are the differentiator: numbers a human has actually called and confirmed, which lifts connect rates well above guessed data. The deepest UK and EMEA mobile coverage of the five, at a sales-led annual price.
- Entry price ~£12,000/yr
- Pricing Demo-gated
- Free plan No
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2

Kaspr

LinkedIn prospecting with one-click mobile and email reveals, strongest across Europe, backed by Cognism.

7.0 /10

The budget route to UK and European mobiles, pulled straight from a LinkedIn profile via the Chrome extension. Strong French and UK numbers and a genuine free plan to test, though thinner outside Europe.
- Entry price from £468/yr
- Pricing Published
- Free plan Yes
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3

Lusha

Self-serve B2B contact data with a one-click Chrome extension and transparent, published pricing.

7.3 /10

Reliable UK and US direct dials through a one-click extension, with published pricing. Just budget for the credit model, where revealing a phone number costs 10× an email.
- Entry price from $449/yr
- Pricing Published
- Free plan Yes
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4

ZoomInfo

The deepest US B2B database, with intent, visitor-ID and enrichment in one platform, at an enterprise price.

7.3 /10

A huge direct-dial and mobile database (around 135M numbers claimed), strongest in the US. UK mobile coverage is real but shallower than the EMEA specialists, and pricing is enterprise-only.
- Entry price ~$14,995/yr
- Pricing Demo-gated
- Free plan No
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5

Apollo

All-in-one prospecting (database, sequencer and dialer) at a fraction of the enterprise price, strongest in the US.

7.4 /10

Mobile numbers are credit-gated and bundled into an all-in-one platform, fair value for US dialing, weaker for verified UK mobiles, which independent tests flag as a soft spot.
- Entry price from $588/yr
- Pricing Published
- Free plan Yes
Visit Apollo
We may earn a commission when you buy through links on this site. It never affects our scores, rankings or verdicts. See our methodology.

Read our Apollo review →

Every score comes from the same rubric, applied identically. See the consolidated pricing table for all providers side by side , or check whether buying B2B data is legal in the UK .

Frequently asked questions

Which B2B provider has the best UK mobile numbers?: Cognism, for verified UK mobiles. Its "Diamond" data is phone-verified (a person has called the number and confirmed the contact), which lifts connect rates above databases of guessed or scraped numbers. Kaspr and Lusha are cheaper self-serve alternatives with solid UK coverage.
What's the difference between a direct dial and a mobile number?: A direct dial reaches a person's desk or extension without going through a switchboard; a mobile number reaches their cell phone. Mobiles are usually more valuable for outbound because they reach the person directly, but they're also harder to source accurately.
Is it legal to use a bought UK mobile number database for cold calling?: You can hold the data under legitimate interest, but before making live marketing calls you must screen numbers against the TPS and CTPS registers, and automated calls need consent even for businesses. See our guide on whether buying B2B data is legal in the UK.