B2B LEAD GENERATION · VERIFIED DATA

Grow your customer base.
Prospexsmarter.

OpenInsider.pro combines verified B2B data, company intelligence, and technology insights to help sales and marketing teams identify the right opportunities with confidence.

app.openinsider.pro/lists

Your next customers — manually verified.

Filter by industry, title, geography and volume. Every record checked by hand.

Verified only
CompanyContactTitleEmail
Northwind HealthS. ChenCMO
Atlas FintechD. OkaforVP Sales
Vertex CloudP. NairCTO
Bright RealtyM. RossiOwner
Lumen LegalE. CarterDirector

SCROLL TO EXPLORE ↓

Leads that convert.
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10–15 yrs experienceManually verifiedSpam Act 2003 compliant14-day guaranteeOne-stop service

Everything to grow your base.

From custom lead generation to email appending and sales intelligence — one team handles your entire prospect-data pipeline.

01openinsider/industry

Industry Leads

Custom lead-generation campaigns that cultivate new business opportunities using both modern and traditional prospecting methods.

Get industry leads
02openinsider/professional

Professional Leads

Targeted prospect selection from premium business list resources, designed to lift your response rates.

Target prospects
03openinsider/append

Email Appending

Turn partial records into reachable contacts — email appended and verified so your campaigns actually land.

Append emails
04openinsider/tech-intel

Sales Intelligence

Manually verified, industry-specific datasets and sales intelligence built for technology vendors and marketers.

See the data
05openinsider/international

International Leads

Global data-partnership solutions for organizations expanding their operations across borders.

Go global
06openinsider/social

Marketing & Social

Technology-driven engagement strategies and sales acceleration across social media platforms.

Grow reach

// ONE STANDARD, EVERY LIST

Leads that convert.

Data, manually verified.

Lists built to order.

Records kept fresh.

Growth that lasts.

Custom campaigns, manually verified data, and 10–15 years of expertise — everything built to grow and keep your customer base.

The end of bad data.

// GENERIC VENDORS

  • Recycled lists sold to everyone — converting no one.
  • Bounced emails wrecking your sender reputation.
  • Bulk data nobody ever checked by hand.
  • One-size-fits-all lists that ignore your niche.
  • No guarantee when the records turn out wrong.

// WITH OPENINSIDER

  • Custom campaigns built for your exact market.
  • Every record manually verified before it ships.
  • 10–15 years of data expertise behind every list.
  • Legally obtained sources — public records, registries, opt-ins.
  • A 14-day deliverability guarantee, with credits for bad records.

// HOW IT WORKS

From brief to booked business.

Brief

Tell us your target — industry, geography, job title and volume. We return instant verified counts so you know exactly what you're getting.

by industryby titleby geographyby volume

Instant verified counts

sample export · openinsider.csv● verified
Northwind HealthS. ChenCMO
Atlas FintechD. OkaforVP Sales
Vertex CloudP. NairCTO
Bright RealtyM. RossiOwner
Lumen LegalE. CarterDirector
Manually verified · updated monthly · 14-day guarantee

// THE FACTS

Less guesswork. More growth.

Experience
15 yr
growing customer bases
Guarantee
14-day
deliverability, credits for bounces
Delivery
5 days
average, 24h rush available
Append turnaround
24h
expedited option
Email results
90%
generate results within 48 hours
Email ROI
$583B+
annual email marketing ROI

// WHAT CLIENTS SAY

Trusted by teams that sell.

Overall, my experience with OpenInsider has been positive. The lists we purchased met our company's needs, and any issues that came up were handled quickly and efficiently.
JP Corriveau
President of LMC Associates
The process was well managed overall. Communication was consistent, and the team worked through payment and delivery coordination efficiently.
Kevin
VP of Engineering & Product Development
Brian and his team were able to customize a highly targeted contact list based on very specific IT roles across Duck Creek users. Despite a few initial delays, they remained responsive, addressed concerns promptly, and ensured the final deliverable aligned with our campaign goals. Their flexibility and data accuracy make them a valuable partner.
Gary Vice
CPC

// GET STARTED

Get your verified counts free.

Tell us your target and we'll send instant verified counts — no obligation. Every list is manually verified and backed by our 14-day deliverability guarantee.

openinsider · request counts
Manually verified14-day guarantee

Prefer email? Rylee.Smith@openinsider.pro

✓ Instant verified counts
✓ Manually verified, custom-built data
✓ Delivery in ~5 days (24h rush available)
✓ Updated monthly for freshness
✓ 14-day deliverability guarantee