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B2B data 27 March 2024

9 CSO Email List Providers With Accurate Data

Daisy Shevlin
SEO & Content Manager @ Kaspr

Looking to purchase or build your own CSO email list? These email list providers have the most accurate and up-to-date contact details to make lead generation easier. 


  1. Kaspr.
  2. Cognism.
  3. Blue Mail Media.
  4. BizProspex.
  5. Hunter.
  6. GetEmail.io.
  7. DemandScience.
  8. TargetNXT.
  9. DataCaptive. 

1. Kaspr

4.4/5 on G2


Kaspr is a data provider that grants access to contact information for United States and European prospects from 150 B2B data sources. The Chrome Extension and web app is for individual SDRs, recruiters, founders, or small sales teams. 


Access 500M+ phone numbers, email addresses, and over 200M+ business profiles to build a CSO list of an SDR’s dreams. 


EN_linkedin-chrome-extension-profile-data-reveal_3(Graphic showing Kaspr working on LinkedIn desktop)


Kaspr’s self-service prospecting tool makes it easy for sales reps to find leads by searching LinkedIn or Linkedin Sales Navigator for “Chief Security Officer” or “CSO.” You can use LinkedIn’s search filters to narrow down your results.


You can also use the LinkedIn Chrome Extension to capture CSO email addresses and other contact information anywhere you’re prospecting on LinkedIn, including an individual’s profile, a company page, or in-feed. 


When you find CSOs that may fall into your target market, use Kaspr to add them to lists and automate outreach to streamline the generation of premium-quality leads.   


Top features: 

  • All-in-one prospecting tool. 
  • LinkedIn Chrome Extension. 
  • GDPR and CCPA aligned.
  • Verified data for accurate email lists and phone numbers. 
  • List-building and outreach features. 
  • ROI-focused analytics.
  • Unlimited B2B email addresses, subject to fair use policy.

Pricing information: 

  • Kaspr’s freemium plan includes 5 phone credits, 5 email credits, and 10 export credits per month. 
  • Paid plans start at $49 per user per month and include 60 direct email credits.

👉 Sign up for Kaspr today


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2. Cognism 

4.6/5 on G2


Cognism is a B2B contact database that will connect you with 87% of your list, and it’s a strong choice for large organizations with expansive sales teams. 


Graphic about Cognism Diamond Data® stats(Graphic showing Cognism’s Diamond Data® facts)


Cognism leverages a combination of manual (Diamond Data®) and AI verification to improve contact data accuracy. It also offers extensive search filters so SDRs can find potential CSOs that align with their target audience more easily than ever. 


Top features:

  • Bulk data enrichment.
  • GDPR and CCPA compliant.
  • Comprehensive database with intuitive search. 
  • List building workflows.
  • Bombora intent data. 
  • Well-suited for large organizations and sales teams. 


  • Cognism offers customized pricing based on each team’s sales needs. 

3. Blue Mail Media

4.8/5 on G2


Blue Mail Media, like multiple tools on this list, offers both ready-made lists of professional contact information and the option to create custom contact lists. 


The ready-made user lists are available for near-instant purchase and include a C-level executives list. 


Custom contact lists account for specific job titles, industries, locations, and more and are compiled by the platform’s data experts based on your customization options. Opting for custom contact lists can increase the number of relevant prospects you receive.  


Top features:

  • Ready-made and custom lists are available.
  • Data experts compile custom lists based on your needs.
  • Easy way to get a list of contacts without manual prospecting. 



  • Pricing information isn’t available online. You can request a quote through Blue Mail Media’s website. 

4. BizProspex

4.9/5 on G2


BizProspex is a data scraping and mining tool. You can create a custom contact list with prospects of certain job titles, countries, company revenue, and company size. You can also purchase ready-made lists based on job titles alone. 


Top features:

  • Custom contact lists based on your specific needs.
  • Option to purchase ready-made lists based on job title, B2B status, and more.
  • Data enrichment solutions. 



  • Pricing for custom lists starts at $199.60 for 1250 contacts.
  • The CSO email list costs $199.60 or 1250 contacts. 

5. Hunter

4.4/5 on G2


Hunter.io is an email database with email verification functionality. Search by company or employee name to find specific CSOs’ contact data. Once you do, you can use the platform’s built-in email verifier to check the accuracy of the email address, which may help improve deliverability and response rates. 


Top features:

  • Search by employee or domain name. 
  • Built-in email verification functionality. 
  • Email tracking. 
  • Personalizable email templates. 
  • A large number of integrations with other sales tools. 



  • Hunter’s free plan includes 25 searches and 50 verifications monthly.
  • Their Starter plan costs $34 per month and includes 500 monthly searches. 

6. GetEmail.io

4.6/5 on G2


GetEmail.io uses big data and machine learning algorithms to help you find professional email addresses lightning-fast, even if they may not necessarily be listed online. 


The platform scans websites to find the general email format of specific companies and then recreates the professional address of the contact you want to reach based on that format. 


One thing to note is that while GetEmail has plenty of reviews indicating that it’s effective, it may not comply with all data privacy laws, so make sure you know the local regulations of your business’s and customer’s locations. 


Top features:

  • Leverages machine learning to find professional email addresses.
  • Claims to have the ability to identify any company email address. 
  • Plenty of positive customer reviews. 



  • The Free plan includes 10 credits per month.
  • The Basic plan is $49 per month and includes 300 credits per month. 

7. DemandScience

4.4/5 on G2


DemandScience is a global B2B contact platform with 570M+ contact records that leverages first-party and third-party data. Search their database using filters like job title and industry to find potential CSP prospects and view intent data to identify potentially hot leads.


Top features:

  • Expansive global database.
  • Uses first-party and third-party data.
  • Intent data is available to spot ready-to-act leads. 



  • No pricing information is available online, but you can contact the sales team for a free quote. 

8. TargetNXT

4/.6/5 on G2


TargetNXT is a prospect database tool with 296M B2B contacts, which includes 80M+ decision makers. They offer a C-level executives email list, which includes contact details for top-level executives like CEOs, CFOs, CSOs, and COOs. 


TargetNXT boasts compliance with privacy and data regulations and claims a 95% email deliverability rate. 


Top features:

  • Targeted email list for C-suite professionals.
  • Data verified from multiple sources.
  • Strict compliance with diverse privacy and data regulations. 
  • High deliverability rates. 



  • You can get a free quote for email lists online. 

9. DataCaptive

3/5 on G2


DataCaptive offers ready-made contact lists, including email addresses, and has a platform where you can search for CSO email addresses. 


Sales reps can purchase ready-made contact lists based on a wide range of industries, with specialized lists for segments like healthcare professionals or technology users. 


The platform’s database also allows you to search for specific CSOs and access their email address if available. 


Top features:

  • Purchase email lists for specific job titles or industries.
  • Review contact and business profiles. 
  • Access B2B prospect intent data.
  • Data enrichment features. 


Pricing: Pricing starts at $749 per month and includes 5,000 credits. 

How to build a CSO email list?

Building a CSO email list starts with a self-service prospecting tool to help you create detailed contact lists.  


Use tools like Kaspr to search B2B databases or platforms like LinkedIn Sales Navigator for people with a CSO job title. Many databases or platforms allow you to add relevant search filters like industry, company revenue, company size, or tech stack.


Look through the results and add relevant CSOs to a new list. 


You can also prospect on LinkedIn and use tools like Kaspr’s free LinkedIn Chrome Extension to capture and save CSO email addresses as you go. 

Where can I find CSO email lists?

If you want to purchase ready-made CSO email lists, providers like DataCaptive offer this. Find relevant lists and complete the purchase online.


There are a few downsides to purchasing already existing CSO email lists, including:

  • The lists may still be too general, with many prospects not aligning with your target audience.
  • Contact information may be outdated and inaccurate depending on when the list was created.
  • Some email list platforms may not comply with privacy regulations like GDPR or CCPA. 


As a result, we strongly recommend that sales reps build their email lists using sales intelligence platforms

What information should be included in a CSO email list?

If you want to write a strong sales email, it needs to be relevant to capture the prospect’s attention and interest.


Your CSO email list should ideally contain enough information to benefit sales reps and SDRs sending that email.


The CSO email list should include:

  • The CSO’s full name.
  • Company name.
  • Specific job title.
  • Company mailing addresses. 
  • Contact information, including email address and phone number.
  • Industry.
  • Company size.
  • Tech stack, if relevant. 


While prospecting, you may discover key information that could help you connect with a particular CSO, like a post they recently shared on LinkedIn or comment on their recent achievement. Use tools like Kaspr to save this information through notes, which you can use during outreach. 

Don’t wait to contact CSOs

Ready to build or expand your CSO mailing list? 


If trying to contact CSOs, sign up for B2B databases known for accuracy and ease of use. 


These databases can play a crucial role in helping you prospect faster and more effectively. If you want to push more CSOs into your sales funnel, act now - don’t wait! 


Individual SDRs and small sales teams can use Kaspr to quickly find and capture CSO contact information - including their email addresses! Build lists, assign tasks to specific contacts, and leverage first-message outreach to convert prospects into leads and, ideally, customers! 


Sign up for free today. Join Kaspr’s 100K users by taking advantage of these benefits:

✅ Self-service, all-in-one prospecting tool.
✅ Free LinkedIn Chrome Extension.
✅ High data accuracy.
✅ 500M+ Phone numbers and email addresses.
✅ 200M+ business profiles.
✅ User-friendly, intuitive search functions.
✅ GDPR and CCPA aligned.
✅ List building and automated outreach features.
✅ Credit card free sign-up. 


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