B2B Prospect Research
ICP-Verified Prospect Pool: hand-researched prospects matched to your ICP
We research verified prospects from scratch — matched to your ICP, checked across 16 sources, and delivered ready to sequence. Your reps call. We do the homework. From £3,000. Done in 7–10 days.
48,000+ verified prospects delivered for B2B revenue teams
Built-in review round — if the data doesn’t hit agreed accuracy benchmarks, we fix it at no extra cost.
Bought lists aren’t a shortcut. They’re a liability.
Bought lists feel fast. They’re not. Every agency your competitors hire pulls from the same databases. Same contacts. Same emails. Same tired sequences landing in the same inboxes — all at once. By the time your rep hits send, that prospect has already deleted five identical ones this month.
Generic lists don’t match your ICP. They match a filter — industry, headcount, geography. Sounds like a profile. It isn’t. The CEO of a three-person startup sits in the same filter as the VP of Sales at a 200-person scaleup. Your reps spend half their morning working out who’s actually worth calling.
And none of it is verified. The average bought list bounces 30–40% within 90 days. That’s not wasted rep time. It’s damaged sender reputation. Spam complaints. Sequences blocked before the right person ever sees them. The list looks like a shortcut until you add up what it actually costs.
How our prospect research
Four stages. Every contact documented. No scraped data.
01ICP scoping
ICP scoping
ICP scoping
We start by defining your ideal customer profile in detail — industry, company size, geography, job titles, seniority levels, and explicit exclusions. If you already have an ICP, we sharpen it. If you don’t, we build it with you on the scoping call. No vague briefs, no assumptions. We lock down exactly who you want before a single record is touched, so every prospect in the final file is someone your reps should actually be calling.
02Company identification
Company identification
Company identification
Target companies are mapped from Companies House filings, commercial databases, and sector-specific sources — not pulled from a single database that every other vendor uses. Our analysts review edge cases manually: subsidiaries vs. parent companies, recently acquired firms, companies that technically match the filter but don’t fit the spirit of your ICP. The goal is a clean company list where every name belongs.
03Contact mapping
Contact mapping
Contact mapping
Within each target company, we identify the decision-makers by role and seniority — the people who actually sign off on purchases, not whoever’s easiest to find on LinkedIn. We map reporting structures where relevant, flag multiple stakeholders at larger organisations, and prioritise the contacts your reps need to reach first. Every prospect is selected because they match the persona you defined in step one, not because they filled out a form three years ago.
04Multi-source verification
Multi-source verification
Multi-source verification
Every email address is syntax-checked, domain-verified, and deliverability-tested. Every phone number is validated against carrier databases. Each data point is cross-referenced across 16 sources including Companies House, LinkedIn, company websites, and specialist B2B databases. We attach a confidence rating to every record — High or Medium only. Low-confidence records are cut before the file reaches you. The result: a prospect file your reps can load and start sequencing on day one without worrying about bounces.
What you get back
Not a login to yet another database. A file you can load and start sequencing.
Verified prospect file — ready to import
CSV or CRM-native format. Name, verified email, direct dial, job title, seniority, company context, LinkedIn URL.
ICP match rationale per record
Why each prospect was included. Firmographic fit, persona match, and any edge-case notes.
Source log per contact
Where each data point came from. Full transparency — no ‘proprietary database’ hand-waving.
Confidence rating: High or Medium only
We don’t deliver Low-confidence records. If we can’t verify it, it doesn’t ship.
Suppression-ready exclusion file
Contacts that were researched but excluded — with reasons. So your team doesn’t waste time re-researching them.
Ready to stop guessing who to call?
No obligation. No credit card. SOW sent same day.
Book a 30-minute scoping callBuilt for teams who need better lists, not bigger lists
If any of these sound familiar, a Pipeline Build is the fastest way to fix it.
We’re launching outbound for the first time
You need 500 verified contacts in your ICP. Not a generic list with 5,000 names you’ll never use.
We’re entering a new vertical
FinTech, SaaS, professional services — whatever the target, we research it from scratch. No recycled data from last year’s campaign.
Bought lists aren’t converting
If your bounce rate is above 5% or reply rates are below 1%, the list is the problem. We build from verified sources, not scraped databases.
Our SDRs are spending half their day researching
That’s £25k+/year in SDR time spent on work that isn’t selling. We do the research. They do the outreach.
We need prospects for a specific campaign
ABM campaign, event follow-up, vertical expansion — we build to the brief, not to a template.
We’ve outgrown ZoomInfo/Apollo
Database tools give you access. We give you a verified, ICP-matched file with source attribution. Different job.
What Clients Say
“We asked for 500 FinTech CFOs and received 523 verified contacts in 8 days. Every record had a direct dial, verified email, and documented ICP match. Our SDRs booked 34 meetings in the first month — triple what we got from our previous list provider.”
Alex Kumar,
Head of Sales, Series A FinTech (45 employees)
“We’d been buying lists for two years and wondering why reply rates kept dropping. ClientWise built us 300 prospects from scratch — bounce rate went from 28% to under 3%. The source log per contact was something we’d never seen before.”
Rachel Morgan,
VP Growth, UK SaaS company
“We needed 200 UK logistics decision-makers for a new vertical. ClientWise delivered 214 in nine days, every one with a Companies House–verified company match. First sequence hit a 14% reply rate — our best performing outbound campaign to date.”
Daniel Frost,
Commercial Director, B2B logistics SaaS (70 employees)
“The ICP match rationale per record was the thing that surprised us. Every contact came with a written note explaining why they fit. It meant our SDRs could personalise the first line of every email without doing any extra research.”
Sophie Langley,
Marketing Director, UK recruitment agency
“We ran a pipeline build alongside our Apollo subscription to compare. ClientWise contacts had a 4.2% bounce rate vs. 19% from Apollo. The verified direct dials alone saved our team hours of LinkedIn hunting every week.”
Chris Osei,
Account Executive, Mid-market SaaS (110 employees)
“Handed over a rough ICP brief on Monday morning. By Wednesday we had a polished SOW and by the following Friday, 400 verified records ready to import into Salesforce. No field mapping headaches, no cleanup needed. Just loaded and started sequencing.”
Laura Kim,
Marketing Operations Manager, PropTech startup
“Our previous list vendor gave us 1,000 contacts and 310 bounced on the first send. ClientWise gave us 500 and we’ve had 11 bounces total over three months. The data quality isn’t comparable.”
Marcus Bell,
SDR Team Lead, Cyber security firm (90 employees)
“We’re a two-person sales team and didn’t have time to build prospect lists ourselves. The pipeline build gave us three months of outbound runway in one delivery. Pipeline value from that single build was north of £200k.”
Anya Petrov,
Co-founder, B2B consultancy
“What sets ClientWise apart is the 16-source verification. We could see exactly where each data point came from. Our compliance team signed off the prospect file in a day — that’s never happened with a bought list.”
Nina Okafor,
Chief Revenue Officer, RegTech (150 employees)
“Needed to break into the UK construction sector with zero existing contacts. ClientWise researched 350 prospects matched to our ICP. Within six weeks we’d booked 22 discovery calls and closed our first deal in the vertical.”
David Renshaw,
Head of Growth, Vertical SaaS (40 employees)
“We asked for 500 FinTech CFOs and received 523 verified contacts in 8 days. Every record had a direct dial, verified email, and documented ICP match. Our SDRs booked 34 meetings in the first month — triple what we got from our previous list provider.”
Alex Kumar,
Head of Sales, Series A FinTech (45 employees)
“We’d been buying lists for two years and wondering why reply rates kept dropping. ClientWise built us 300 prospects from scratch — bounce rate went from 28% to under 3%. The source log per contact was something we’d never seen before.”
Rachel Morgan,
VP Growth, UK SaaS company
“We needed 200 UK logistics decision-makers for a new vertical. ClientWise delivered 214 in nine days, every one with a Companies House–verified company match. First sequence hit a 14% reply rate — our best performing outbound campaign to date.”
Daniel Frost,
Commercial Director, B2B logistics SaaS (70 employees)
“The ICP match rationale per record was the thing that surprised us. Every contact came with a written note explaining why they fit. It meant our SDRs could personalise the first line of every email without doing any extra research.”
Sophie Langley,
Marketing Director, UK recruitment agency
“We ran a pipeline build alongside our Apollo subscription to compare. ClientWise contacts had a 4.2% bounce rate vs. 19% from Apollo. The verified direct dials alone saved our team hours of LinkedIn hunting every week.”
Chris Osei,
Account Executive, Mid-market SaaS (110 employees)
“Handed over a rough ICP brief on Monday morning. By Wednesday we had a polished SOW and by the following Friday, 400 verified records ready to import into Salesforce. No field mapping headaches, no cleanup needed. Just loaded and started sequencing.”
Laura Kim,
Marketing Operations Manager, PropTech startup
“Our previous list vendor gave us 1,000 contacts and 310 bounced on the first send. ClientWise gave us 500 and we’ve had 11 bounces total over three months. The data quality isn’t comparable.”
Marcus Bell,
SDR Team Lead, Cyber security firm (90 employees)
“We’re a two-person sales team and didn’t have time to build prospect lists ourselves. The pipeline build gave us three months of outbound runway in one delivery. Pipeline value from that single build was north of £200k.”
Anya Petrov,
Co-founder, B2B consultancy
“What sets ClientWise apart is the 16-source verification. We could see exactly where each data point came from. Our compliance team signed off the prospect file in a day — that’s never happened with a bought list.”
Nina Okafor,
Chief Revenue Officer, RegTech (150 employees)
“Needed to break into the UK construction sector with zero existing contacts. ClientWise researched 350 prospects matched to our ICP. Within six weeks we’d booked 22 discovery calls and closed our first deal in the vertical.”
David Renshaw,
Head of Growth, Vertical SaaS (40 employees)
“We asked for 500 FinTech CFOs and received 523 verified contacts in 8 days. Every record had a direct dial, verified email, and documented ICP match. Our SDRs booked 34 meetings in the first month — triple what we got from our previous list provider.”
Alex Kumar,
Head of Sales, Series A FinTech (45 employees)
“We’d been buying lists for two years and wondering why reply rates kept dropping. ClientWise built us 300 prospects from scratch — bounce rate went from 28% to under 3%. The source log per contact was something we’d never seen before.”
Rachel Morgan,
VP Growth, UK SaaS company
“We needed 200 UK logistics decision-makers for a new vertical. ClientWise delivered 214 in nine days, every one with a Companies House–verified company match. First sequence hit a 14% reply rate — our best performing outbound campaign to date.”
Daniel Frost,
Commercial Director, B2B logistics SaaS (70 employees)
“The ICP match rationale per record was the thing that surprised us. Every contact came with a written note explaining why they fit. It meant our SDRs could personalise the first line of every email without doing any extra research.”
Sophie Langley,
Marketing Director, UK recruitment agency
“We ran a pipeline build alongside our Apollo subscription to compare. ClientWise contacts had a 4.2% bounce rate vs. 19% from Apollo. The verified direct dials alone saved our team hours of LinkedIn hunting every week.”
Chris Osei,
Account Executive, Mid-market SaaS (110 employees)
“Handed over a rough ICP brief on Monday morning. By Wednesday we had a polished SOW and by the following Friday, 400 verified records ready to import into Salesforce. No field mapping headaches, no cleanup needed. Just loaded and started sequencing.”
Laura Kim,
Marketing Operations Manager, PropTech startup
“Our previous list vendor gave us 1,000 contacts and 310 bounced on the first send. ClientWise gave us 500 and we’ve had 11 bounces total over three months. The data quality isn’t comparable.”
Marcus Bell,
SDR Team Lead, Cyber security firm (90 employees)
“We’re a two-person sales team and didn’t have time to build prospect lists ourselves. The pipeline build gave us three months of outbound runway in one delivery. Pipeline value from that single build was north of £200k.”
Anya Petrov,
Co-founder, B2B consultancy
“What sets ClientWise apart is the 16-source verification. We could see exactly where each data point came from. Our compliance team signed off the prospect file in a day — that’s never happened with a bought list.”
Nina Okafor,
Chief Revenue Officer, RegTech (150 employees)
“Needed to break into the UK construction sector with zero existing contacts. ClientWise researched 350 prospects matched to our ICP. Within six weeks we’d booked 22 discovery calls and closed our first deal in the vertical.”
David Renshaw,
Head of Growth, Vertical SaaS (40 employees)
What makes this different from every other list provider
Hand-researched, not scraped
Every prospect identified by our analysts, not pulled from a database everyone else has access to. That’s why your competitors aren’t already emailing them.
16 sources, verified end-to-end
Companies House, LinkedIn, commercial databases, direct verification. Every data point cross-referenced. One-source tools miss what we catch.
ICP-matched with rationale
Every record includes why it was included. Firmographic fit, persona match, seniority level. Not just ‘they have a LinkedIn profile’.
You own the data
Delivered into your CRM. We don’t hold it, resell it, or retain it after delivery. It’s yours.
Fixed scope. Fixed price.
No per-contact surcharges. No platform fees. You know the cost before you start.
250 verified prospects
£3,000
Ideal for a single campaign or ABM push into a focused vertical. Enough to fill one outbound sequence with high-quality targets.
- 250 ICP-matched, individually researched prospects
- Verified email + direct dial per contact
- ICP match rationale per record
- Source log per data point
- Delivered in 7–10 business days
500 verified prospects
£5,000
The sweet spot for most revenue teams. Enough volume to run multi-touch sequences across two or three segments without recycling contacts.
- 500 ICP-matched, individually researched prospects
- Verified email + direct dial per contact
- ICP match rationale per record
- Source log per data point
- Suppression-ready exclusion file
- Deliverability validation report
- Delivered in 7–10 business days
1,000 verified prospects
£8,500
For teams scaling outbound or entering multiple verticals simultaneously. Full pipeline coverage with quarterly refresh potential.
- 1,000 ICP-matched, individually researched prospects
- Verified email + direct dial per contact
- ICP match rationale per record
- Source log per data point
- Suppression-ready exclusion file
- Deliverability validation report
- Multi-segment ICP targeting
- Delivered in 10–14 business days
Built-in review round. If the data doesn’t meet agreed quality benchmarks, we fix it at no extra cost.
Need more than 1,000 prospects? Book a scoping call — we’ll price it within hours.
Common questions about prospect research
It’s ICP-matched prospect research from scratch. We identify companies that fit your ideal customer profile, map the right contacts inside them, verify every record across 16 sources, and deliver a ready-to-sequence file. No bought lists, no recycled databases — every prospect is researched specifically for you.
Bought lists are bulk databases sold to hundreds of companies. Half the emails bounce, the job titles are months out of date, and nobody has checked whether the companies actually match your ICP. We research each prospect individually, verify every field, and include a written rationale for why each record matches your profile.
Your ideal customer profile — industry, company size, geography, job titles, and any deal-breakers. If you have a rough ICP, we’ll sharpen it on the scoping call. If you don’t have one at all, we’ll build it with you. The scoping call takes 30 minutes.
Every record is cross-referenced against 16 sources including Companies House, LinkedIn, company websites, and specialist B2B databases. Email addresses are syntax-checked, domain-verified, and deliverability-tested. We only deliver contacts rated High or Medium confidence — anything below that gets cut.
Full name, verified email, job title, phone number (where available), company name, company website, industry, employee count, and LinkedIn URL. Every record also includes an ICP match rationale, confidence rating, and source log so you know exactly where the data came from.
HubSpot, Salesforce, Pipedrive, and any CRM that accepts a CSV import. For HubSpot and Salesforce, we format the file specifically for their native import flows — no manual field mapping required. If you want it in a Google Sheet or plain CSV, that works too.
It means every prospect has been individually checked against your agreed criteria — not just scraped from a database filter. Each record includes a written rationale explaining why that company and contact match your ICP. If a prospect doesn’t meet the brief, it doesn’t make the list.
7–10 business days from the signed SOW. The scoping call and ICP definition happen upfront, and we send a 2-page SOW within hours. Larger builds (1,000 prospects) may sit at the longer end of that range.
Every project includes a built-in review round. If any records don’t meet the agreed ICP criteria or quality benchmarks, we replace them at no extra cost. If we genuinely can’t deliver what was scoped, we refund the relevant portion. The terms are in every SOW.
Yes. All prospect data is sourced under legitimate interest grounds, which is the standard legal basis for B2B outreach under UK GDPR. We don’t scrape personal accounts or use restricted data. Every record includes a source log so your compliance team can audit the provenance.
Stop sending sequences to contacts who don’t exist.
One scoping call. 30 minutes. You’ll leave knowing exactly how many prospects we’ll deliver, what it costs, and when they’ll be in your CRM.
SOW sent same day. No deck. No discovery phase.Your competitors are already emailing the same bought lists.
Related Services
Explore more ways we can help your GTM team work with data they can trust.
CRM Quality Audit
Audit, deduplicate, enrich, and score your existing records across 16 sources.
You get: Cleaned, enriched CRM export with a full data health report and enrichment log.
Always-Fresh Pipeline Retainer
Monthly enrichment, monitoring for job changes, and new prospect delivery.
You get: Monthly delivery of updated records, change flags, and new additions — into your CRM.