Data

Need Reliable, Accurate Cold Calling Data?

Tell us your target customer. We deliver 1000 mobile numbers every month. For every wrong number, we send another, guaranteed.

Your List, Built by Experts—In 4 Steps.

Fill Out the Questionnaire

Tell us your target customer – region, industry, size, and more.

We Build Your List

Our data experts use 75+ tools and AI to deliver deeply researched, usable data.

Receive Your CSV

Get 1000 mobile numbers, accurate and reliable, ready to dial.

Start Calling

Hit 50 dials a day. Wrong number? We send you another – no charge.

Your Monthly Cold Calling Power.

Each month, you get a CSV with 1000 mobile numbers, crafted by our data experts to be accurate, reliable, and cost-effective – ensuring your data is usable.

Enough for 50 conversations a day, 20 days a month – sourced with shocking accuracy to boost your pipeline.

Lead
UK · Mobile
+44 7•• ••• 4231
Lead
UK · Mobile
+44 7•• ••• 8867
Lead
UK · Mobile
+44 7•• ••• 0192
Lead
UK · Mobile
+44 7•• ••• 5704
Lead
UK · Mobile
+44 7•• ••• 3318
Lead
UK · Mobile
+44 7•• ••• 9056

Pitch-Perfect Lists by Data Experts.

Fill Out the Questionnaire

10x more accurate than Apollo or ZoomInfo, using 75+ AI-powered enrichment tools to deliver precise, deeply researched data.

Time and Cost Efficiency

Automate lead generation with our scrapers, saving hours of manual work while delivering reliable, ready-to-use data.

Guaranteed Satisfaction

For every wrong number, we provide a replacement at no cost, ensuring you only pay for accurate, high-quality data.

Enhanced Sales Performance

Build a stronger pipeline with +50% better-fit leads, reducing wasted effort and improving overall conversion rates.

Advanced Targeting

Find top customers in any industry, region, or size using AI-driven filters and lookalike models for precise outreach.

Pricing

One Plan,
Maximum Impact.

Each month, you get a CSV with 1000 mobile numbers, crafted by our data experts.

£499

/month

No delays, no fluff - just usable data, every month.

Unmatched Accuracy, Expert-Driven.

Harper is a team of data experts using Smart Waterfall Enrichment – 100+ premium providers, 75+ enrichment tools, AI agents, and web scrapers – to build lists with shocking accuracy. We go beyond conventional providers, scraping unstructured data and finding any data point you can imagine – saving you hours of manual work.
Go to market faster with unique, reliable insights.
Cognism
ZoomInfo
Apollo
100+ Providers
75+ Tools
AI Agents
Web Scrapers
Verified List
Hunter
OpenAI
Clay

Get Started

Unmatched Accuracy, Expert-Driven.

Harper is a team of data experts using Smart Waterfall.

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