LeadNumbers vs Seamless.AI in the UK
A UK alternative to Seamless.AI for teams that want checked numbers
The short answer
Seamless.AI searches in real time and asks your team to judge what comes back. For UK calling that means sorting head office switchboards and non-geographic numbers by hand. LeadNumbers applies the screening first: UK records are matched to your written profile, audited twice, and only mobiles and explicitly direct lines are delivered.
Side by side
Where the two approaches differ
| Point | Seamless.AI in the UK | LeadNumbers |
|---|---|---|
| Screening | Done by your reps after the search. | Done before delivery, twice, with switchboards and 0800 numbers rejected. |
| UK targeting | Rebuilt per search. | Written once and applied to every future batch. |
| Repeat contacts | Your job to deduplicate. | Never the same person twice across your account history. |
| Pacing | Whatever gets exported. | A steady batch each UK business day. |
| Wrong numbers | Spend another credit. | Flagged and replaced free within fair use. |
Product details change often. Check Seamless.AI in the UK directly for their current plans and features, then judge both on the same test: how many real conversations each one puts on your calendar this month.
Fit
Who each option is for
Choose Seamless.AI in the UK if
UK teams happy to search interactively and check results themselves.
Choose LeadNumbers if
UK teams who want a fixed daily batch of checked, callable contacts with free replacements.
Triggers
When teams make the switch
- Search results are full of reception lines and old numbers.
- Reps lose the first hour of the day checking data.
- You want UK mobiles rather than a mixed export.
- You want one monthly price rather than credits.
FAQ
Questions buyers ask
Do you reject non-geographic UK numbers?
Yes. 0800 and similar non-geographic numbers, switchboards and extension-only numbers are rejected before a record can be delivered.
Can I keep my existing sequencer?
Yes. We deliver the prospects and push them into your CRM or sequencer. Outreach stays where it is.
How do I compare quality?
Take five free UK prospects and dial them against a comparable export.
Dialing partner
Do not want to make the calls yourself?
LeadNumbers builds your list. Our dialing partner ColdCalls.Ca can call it for you. North American reps with 10 or more years of B2B sales experience call in your company name, handle gatekeepers and objections, and book interested buyers straight into your calendar. One blended rate of $1 per dial, prospect data included, with 3,000 dials a month as the recommended starting point.
More comparisons
Other options buyers weigh up
Comparison
LeadNumbers vs Apollo.io
Founders, sales leaders and agencies who want a predictable monthly volume of fresh prospects landing automatically, with no list building, no credit management and no seat sprawl.
Comparison
LeadNumbers vs ZoomInfo
Teams of one to fifty who need callable prospects now, want a monthly price they can predict, and do not want a procurement cycle to start outbound.
Comparison
LeadNumbers vs Cognism
Teams that measure success in conversations, not searches, and want a fixed monthly number of callable prospects with no list building at all.
Comparison
LeadNumbers vs Lusha
Teams running consistent outbound who need volume, pacing, deduplication and CRM delivery without anybody clicking through profiles.
Comparison
LeadNumbers vs Seamless.AI
Teams that want a fixed monthly volume of audited prospects arriving automatically, with wrong numbers replaced free.
Comparison
LeadNumbers vs Clay
Founders, sales leaders and agencies who want the output without owning the machinery.
Comparison
LeadNumbers vs UpLead
Teams that need consistent weekly calling supply with callable numbers and no manual exports.
Comparison
LeadNumbers vs RocketReach
Teams running outbound at volume who need a reliable daily supply of callable contacts.
Comparison
LeadNumbers vs LeadIQ
Teams that would rather their reps spent that hour calling and received an audited list instead.
Comparison
LeadNumbers vs Kaspr
Teams that need hundreds or thousands of callable contacts a month without anyone clicking reveal.
Comparison
LeadNumbers vs Lead411
Teams who want reps calling rather than searching, and who would rather receive a ready list than build one every week.
Comparison
LeadNumbers vs Wiza
Teams who want a callable list to appear each morning without anyone owning a search process.
Comparison
LeadNumbers vs Swordfish AI
Sales teams who need both the right people and the right numbers, arriving automatically.
Comparison
LeadNumbers vs Hunter.io
Teams that call as well as email, and want the target list chosen, screened and delivered rather than looked up domain by domain.
Comparison
LeadNumbers vs Clearbit
Teams whose pipeline is limited by how many qualified people they can reach this week.
Comparison
LeadNumbers vs LeadGenius
Teams who want standard firmographic and role targeting, callable numbers and delivery starting within a day.
Comparison
LeadNumbers vs Apollo.io in the UK
UK founders, sales leaders and agencies who want a set number of callable UK prospects landing every morning without anyone owning a list build.
Comparison
LeadNumbers vs Apollo.io in Canada
Canadian founders, agencies and sales leaders who want predictable daily volume of callable contacts and no credit management.
Comparison
LeadNumbers vs ZoomInfo in the UK
UK teams of one to fifty who want to start outbound this week without a procurement cycle.
Comparison
LeadNumbers vs Cognism for US outbound
US-focused teams who want a set monthly number of callable contacts delivered, priced per prospect rather than per seat.
Comparison
LeadNumbers vs Kaspr for US outbound
US calling teams who need volume delivered rather than revealed one contact at a time.