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B2B data 19 February 2024

11 Best Chrome Extensions For Finding Phone Numbers

Daisy Shevlin
SEO & Content Manager @ Kaspr

Searching for a prospect’s phone number? Chrome Extensions that provide contact details can speed up the process. 


  1. Kaspr.
  2. Cognism.
  3. Apollo.io.
  4. ZoomInfo.
  5. RocketReach.
  6. Seamless.AI.
  7. ContactOut.
  8. Lusha.
  9. SignalHire.
  10. Swordfish.
  11. UpLead. 

11 Chrome Extensions for finding contact numbers

Contact-finding Chrome Extensions can help you find and extract prospects’ phone numbers quickly. These are the 11 best Chrome Extensions for finding prospect contact details (including phone numbers) in 2024. 👇

1. Kaspr

4.4/5 on G2 ⭐


Kaspr is an all-in-one prospecting tool with a powerful number-finding LinkedIn Chrome Extension. 


Use the free LinkedIn Chrome Extension to access and save important prospect information, including business email addresses, name, job title, and, of course, phone numbers. 


The Chrome Extension captures these contact details anywhere on LinkedIn. Use it to enrich data from LinkedIn’s filtered searches, Sales Navigator, and LinkedIn Recruiter lists in bulk. 


Check out our interactive demo to see how Kaspr works. 👇



Why do over 100K users choose Kaspr to find phone numbers?

  • Access and save prospect information fast, including name, job title, and phone number.
  • Works on LinkedIn and associated platforms like LinkedIn Sales Navigator or Recruiter Lite.
  • Build lists within Kaspr’s web app, adding notes and tasks to prospects.
  • Make phone calls directly from Kaspr’s web app with Ringover and Aircall integrations.
  • Part of Cognism: One of the largest cell phone databases globally.
  • Data coverage across Europe, the US, and APAC.
  • Free version to test phone numbers.
  • GDPR and CCPA aligned.


“I compared like-for-like. So, when I couldn’t find a phone number in Lusha, I would use Kaspr instead. The success rate was much better, and the numbers were actually ringing.” - Mateusz Jaworski, SDR Manager at Cloud Direct


Pros and cons

The pros of Kaspr’s contact finder Extension include:

  • High data accuracy rates for phone numbers and email addresses. 
  • Available with Kaspr’s free plan.
  • Really easy to use. 
  • Use on LinkedIn and its associated platforms to access accurate phone numbers globally. 


The cons include:

  • Credit-based consumption model so doesn’t come with unrestricted access like some providers.
  • Kaspr is best suited for individual SDRs or small sales teams instead of enterprise-grade corporations. 


Pricing information and plans: 

  • Kaspr’s Free Plan includes; 5 phone credits 5 direct email credits, and 10 export credits per month.
  • Get unlimited B2B email addresses in all plans (and included in free when you invite three colleagues to sign up).
  • The Starter plan costs $49 per month per user with 1,200 phone credits. 


👉 See how we’re helping salespeople in their day-to-day prospecting routine.


Blog CTA graphic - Five phone number credits per month for free

2. Cognism

4.6/5 on G2 ⭐


Cognism is a B2B contact database known for high accuracy rates for both European and American phone numbers. 


Cognism’s Chrome Extension allows you to access Cognism’s data while browsing LinkedIn and LinkedIn Sales Navigator, company websites, and your CRM or sales engagement tools. It displays Cognism’s data, which you can save to add to your CRM data.


Top features of Cognism

  • GDPR and CCPA compliant.
  • Combined human and AI verification for maximum data quality.
  • Access US and European phone numbers on multiple websites, including LinkedIn. 


Pros and cons 

The pros of Cognism’s number-finding Extension include:

  • Discover new prospects and their data at once.
  • Enrich data for prospects in your CRM.
  • Exceptionally high data accuracy rates for B2B phone numbers (will connect you with 87% of your list).


The cons include:

  • It may be better suited to large sales teams than individual sales reps.
  • The Chrome Extension is only available to paying customers. 


Pricing information and plans: 


👉 We’re part of the same family: Kaspr vs. Cognism - Find out which is right for you.

3. Apollo.io

4.8/5 on G2 ⭐


Apollo.io’s Chrome Extension allows you to access Apollo’s database while browsing other sites and using tools. These tools include LinkedIn, Gmail, Salesforce, HubSpot, and major brand company sites. 


Simply click on the Extension while browsing, and you can see contact information like a prospect’s name and phone number. 


Top features of Apollo.io’s platform

  • Use across multiple popular sales tools, LinkedIn, and major brand sites.
  • Access Apollo’s data while browsing online.
  • Enrich CRM data in-app. 


Pros and cons

The pros of Apollo’s number-finding Extension include:

  • Highly rated by customers.
  • Can find and enrich phone numbers through multiple tools. 
  • Some phone credits come with the free plan. 


The cons include:


Pricing information and plans: 

  • Apollo.io has a free plan with 5 cell phone credits per month.
  • The Basic plan is $49 and comes with 900 cell phone credits annually.

4. ZoomInfo

4.4/5 on G2 ⭐


ZoomInfo’s Chrome Extension works like other tools discussed so far. Free for ZoomInfo customers, use the Extension to access prospect phone numbers and key details while browsing online. 


Top features of ZoomInfo

  • Add qualified prospects to email lists.
  • Export contact data effortlessly.
  • Export searches to tools thanks to over 70+ integrations. 
  • Access phone numbers, email addresses, and key buying signals. 


Pros and cons

The pros of ZoomInfo’s number-finding Extension include:

  • List-building and automation features.
  • Easy prospect export.
  • Buyer intent data in addition to primary contact data. 


The cons include:


Pricing information and plans: 

  • A free trial is available.
  • Contact sales for pricing information. 

5. RocketReach

4.5/5 on G2 ⭐


RocketReach’s desktop Chrome Extension allows you to access RocketReach’s database while browsing online. Get professional phone numbers from contacts while browsing LinkedIn, AngelList, CrunchBase, and company websites. Discover which key players work for a specific company and get their contact information at the same time.  


Top features of RocketReach

  • Use on multiple websites and social platforms. 
  • Access RocketReach’s extensive database.
  • Get company information like annual revenue and industry. 


Pros and cons

The pros of RocketReach’s number-finding Extension include:

  • Easy to use.
  • Use on diverse databases.
  • Free for RocketReach customers. 


The cons include:

  • Some reviews reported poor customer experiences or support. 
  • Some reviews noted that even inaccurate contact data chews up credits. 


Pricing information and plans: 

  • You need the Pro plan or higher (starting at $99 per month) to access phone credits, which offers unlimited cell phone numbers and 3600 exports. 

6. Seamless.AI

4.2/5 on G2 ⭐


Seamless.AI’s Chrome Extension can be used anywhere online (according to Seamless.AI), including company websites and LinkedIn. You can research companies or contacts with a few clicks and automate list building. 


Top Seamless.AI features

  • Company and contact research capabilities.
  • Update CRM with AI-driven data enrichment. 
  • Enrich Gmail contacts in-app. 

Pros and cons

The pros of Seamless.AI’s number-finding Extension include:

  • The Extension itself is free.  
  • Simple interface for both company and contact research. 
  • Works well on both company websites and LinkedIn. 


The cons include:

  • User reviews note the lowest-cost plans are more expensive than many competitors. 
  • Some users report regularly crashing of Extension. 


Pricing information and plans: 

  • The Free plan includes 50 credits per month.
  • Contact sales for additional pricing information.

Blog CTA graphic - Test our phone number accuracy

7. ContactOut

4.5/5 on G2 ⭐


ContactOut is an AI-focused prospecting search engine with functionality in its own database and on LinkedIn social media profiles. 


The ContactOut Chrome Extension can help with this, providing access to over 300M prospects’ data, like phone numbers and emails. 


Top features of ContactOut

  • Automated outreach with AI-crafted messages.
  • Built-in list building and CRM syncing features.
  • Integrate with over 5,000 apps. 


Pros and cons

The pros of ContactOut’s number-finding Extension include:

  • AI-boosted search available.
  • Extensive integrations are available.
  • Automated, AI-crafted outreach. 


The cons include:

  • One review noted that the database contained inaccurate data. 


Pricing information and plans: 

  • ContactOut’s free plan offers 2 phone numbers per day.
  • The Sales plan costs $79 and has 600 phone numbers per year. 

8. Lusha

4.3/5 on G2 ⭐


Lusha’s Chrome Extension can quickly help you find B2B email addresses and phone numbers. Access Lusha’s contact data through the Extension on LinkedIn (and platforms like LinkedIn’s Sales Navigator and Recruiter), Salesforce, or company websites. You can also begin outreach through the Extension. 


Lusha’s top features

  • Start the outreach process without leaving the page.
  • Use on multiple LinkedIn platforms, Salesforce, and company pages.
  • Sync data with HubSpot or Salesforce CRMS. 

Pros and cons

The pros of Lusha’s number-finding Extension include:

  • CRM integrations.
  • Easy-to-use interface.
  • Automated outreach.  


The cons include:


Pricing information and plans: 

  • Lusha’s free plan includes 5 phone number credits.
  • The Pro plan costs $29 per user, and comes with 480 phone number credits. 

9. SignalHire

3.5/5 on G2 ⭐


SignalHire’s Chrome Extension can provide direct contact information, including phone numbers. It works on social media profiles including; LinkedIn, Twitter, Facebook, and GitHub. 


It may find up-to-date business or personal phone numbers, personal emails, and social media profiles for prospects. 


Top features

  • Find not only phone numbers and emails but also social profiles.
  • Works on different social media platforms compared to other Extensions.
  • 5 free credits monthly. 


Pros and cons

The pros of SignalHire’s number-finding Extension include:

  • Integrates with popular CRMs.
  • Multiple customer support options.
  • Open API for data enrichment. 


The cons include:

  • Use the data carefully because some prospects won’t want outreach to their personal contact information.
  • Reviews noted that “verified” contact information was often inaccurate. 


Pricing information and plans: 

  • All paid plans include the Chrome Extension.
  • Plans start at $49 per month, and you can choose a phone number-only plan for 100 phone credits. 

10. Swordfish.AI

4.5/5 on G2 ⭐


Swordfish’s Chrome Extension can work on individual prospect profiles and entire lists, allowing you to streamline prospecting. 


You can pull phone numbers and verified business emails for lists in seconds. It works on Google, Bing, Facebook, LinkedIn, GitHub, Twitter, and StackOverflow. 


Top Swordfish.AI features

  • Find contact information in bulk. 
  • Access multiple social media sites and search engines other Extensions don’t. 
  • 3.5 billion individual data points. 


Pros and cons

The pros of Swordfish’s number-finding Extension include:

  • Highly rated, with 4.8 stars on Google Chrome. 
  • Flexibility in use with individual or bulk prospecting.  
  • Partner with cell phone carriers to verify data. 


The cons include:

  • Works on multiple social media profiles but not company sites.

Pricing information and plans: 

  • Contact sales for pricing. 

11. UpLead

 4.7/5 on G2 ⭐


UpLead’s Chrome Extension is similar to the rest on our list, allowing you to capture lead information directly from your browser. Access lead data from a prospect’s LinkedIn profile and load company data in a single click. Sync the data to your CRM or download it to CSV. 


UpLead’s top features

  • Effortless data sync and CSV export. 
  • Prospect and enrich data.
  • See related contacts to leads you’re viewing.  
  • 95% data accuracy. 


Pros and cons

The pros of UpLead’s number-finding Extension include:

  • Features like “related contacts” to make prospecting easier.
  • Simple-to-use interface.
  • Access to data like company tech stack.  


The cons include:

  • Pricing may be too high for small teams or individual SDRs.
  • Some teams report low phone number accuracy rates. 


Pricing information and plans: 

  • The Essentials plan costs $99 per month and includes 170 credits, which can be used on email and phone number credits. 

How can I find a phone number for free?

There are plenty of methods you can use to find someone’s cell phone number free, but make sure you choose methods known for both high accuracy and compliance with privacy laws. 


Kaspr’s Chrome Extension can help with that - it is GDPR and CCPA aligned, with a database of 500M+ phone numbers and email addresses.

What Chrome Extensions find phone numbers from LinkedIn?

Plenty of Chrome Extensions can help find phone numbers from LinkedIn, but Kaspr, Cognism, and Apollo.io are among the best. They have reliable accuracy rates, are easy to use, and are self-service prospecting tools. 

Find phone numbers for free with Kaspr!

Use Kaspr’s LinkedIn Chrome Extension to quickly capture accurate contact data - including their professional phone numbers. Find and enrich data through lead lists, LinkedIn, Sales Navigator, or LinkedIn Recruiter. 


The good news is that the Chrome Extension is available with Kaspr’s free plan and 5 phone number credits (refreshed each month). Sign up today


Join Kaspr’s 100K community of users to get these benefits:

✅ All-in-one, self-service prospecting tool.
✅ LinkedIn Chrome Extension available with free plan.
✅ 500M+ Phone numbers and email addresses with high data accuracy.
✅ 200M+ Business profiles.
✅ GDPR and CCPA aligned.
✅ Outreach automation.
✅ Credit card free sign-up. 


Blog CTA graphic - Five phone number credits per month for free

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