We test phone numbers in-country.

Our testing platform proactively monitors global toll, toll-free and premium rate numbers, allowing you to optimize customer experience and communications leading to business growth.


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We work with world's greatest brands

Large Enterprise Mastercard

Mastercard and many others in the payment cards and financial services space leverage the power of Spearline services to grow their business.

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Unified Communications Zoom Video Communications

See how Zoom ensures that its service offering consistently delivers high quality to users.

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Unified Communications Arkadin

Hear about how Arkadin's proactive monitoring of its voice network enables a superior customer experience.

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Enterprise Aircall

Aircall is a cloud based phone system and call center software all-in-one with Cloud Telephony Integrations (CTI) with your favorite CRM & Helpdesk software. No hardware or deskphone needed.

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Proactive testing and monitoring Measure what matters


Test for connection success or failure, which could mean the difference between a delighted customer or a lost customer

Audio quality

Replicate your customers’ experience and measure audio quality with objective, industry standards

Post dial delay

Measure the delay between the start of the call and when it’s answered, accurately, highlighting any quality issues

Touch tone

Check if DTMF (touch tones) are failing for your customers


Replicate the customer call flow and quantify the amount of latency your customers experience

Performance benchmarking

Set and achieve quality goals based on historical performance and on benchmarked indicators

Read more about our test types here


IN-COUNTRY TESTINGExperience audio exactly as your customers do

With a physical presence in over 60 countries - the only solution replicating your customer’s experience with such large coverage.

Coverage Map


BOTH LANDLINE & MOBILETest calls to and from both landlines and mobile

We can test through PSTN (traditional landlines) and mobile, replicating your customers' experience from their country and method of calling.

Test Types


NO INSTALLATIONCloud-based platform means no physical installation required

Our cloud-based platform means no physical infrastructure and limited effort at your end.  Plus, with our worldwide coverage through our own proprietary infrastructure, testing can be enabled in minutes.

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Arnie Chencinski

"Spearline gives us a very flexible dashboard with a user-friendly interface for managing our numbers and scheduling exactly when our tests get run."

Arnie Chencinski, Senior Voice Network Engineer Zoom Video Communications

Rosie Scott

"Spearline provides first rate audio quality testing tools that allow us to enhance our customers' experience. I cannot overstate the value of their solutions."

Rosie Scott, PGI Director of Vendor Management - EMEA PGI

Gregor Rennie

"The platform has been exceptional in our ability to drive carrier improvements, customer fault investigations and alerting of any country issues."

Gregor Rennie , EMEA Carrier Account Manager, West Unified Communications

Pierre-Baptiste Béchu

"Spearline gave us better visibility on the quality of our service, and allowed us to detect and solve issues much faster. It contributed to improving call quality and customer satisfaction."

Pierre-Baptiste Béchu, Tech Co-Founder Aircall

Stamatios Papadatos

"Spearline has been a tremendous partner, enabling us to provide more proactive early detection services, associated with international line incidents that enable a more proactive approach to resolving customer line quality issues in various countries throughout the world. "

Stamatios Papadatos, CCS NAO IT Telecom Lead Architect Atos

Ready to get started?

In-country testing for landlines and mobile with no installation.

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