Close.io
Close.io, With built-in calling, SMS, and email all in one platform, Close.io is designed to help the customer close more deals.
Market Share of Close.io
Current Customer(s)
112
Market Share (Est.)
0.07%
Ranking
#35
Top Competitors and Alternatives of Close.io
The top three of Close.io’s competitors in the VoIP And SIP category are CallRail with 29.84%, Skype with 20.03%, Cisco WebEx with 13.78% market share.
Popular Comparisons
Top Competitors and Alternatives of Close.io
The top three of Close.io’s competitors in the VoIP And SIP category are CallRail with 29.84%, Skype with 20.03%, Cisco WebEx with 13.78% market share.
Close.io vs CallRail
Close.io vs Skype
Close.io vs Cisco WebEx
Close.io vs Cisco VoIP
Close.io vs Cisco Unified Communications Manager (CallManager)
Close.io vs Google Voice
Close.io vs RingCentral
Close.io vs Genesys PureCloud
Customers of Close.io
Around the world in 2025, over 112 companies have started using Close.io as VoIP And SIP tool.
| Customers | Employee Range | City | Region | Country | Social Links |
|---|---|---|---|---|---|
| Sportradar | 5,000 - 9,999 | Sankt Gallen | Saint Gallen | Switzerland |     |
| DePaul University | 5,000 - 9,999 | Chicago | Illinois | United States | |
| Housecall Pro | 1,000 - 4,999 | Denver | Colorado | United States | |
| ClearTax | 1,000 - 4,999 | Bengaluru | Karnataka | India | |
| Deriv | 1,000 - 4,999 | Birkirkara | Birkirkara | Malta | |
| Bernstein - Rein Advertising | 1,000 - 4,999 | Kansas City | Missouri | United States | |
| ZipRecruiter | 1,000 - 4,999 | Santa Monica | California | United States | |
| Hudl | 1,000 - 4,999 | Lincoln | Nebraska | United States | |
| Elastic | 1,000 - 4,999 | San Francisco | California | United States | |
| Sphinx Worldbiz Limited | 500 - 999 | Noida | Uttar Pradesh | India | |
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Close.io Customers by Products and Services
The top three products and services offering customers that use Close.io for VoIP And SIP are Marketing (5), E-Commerce (4), Technology (3).
Customers
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Close.io Customers by Employee Size
The majority of Close.io's customers for the voip category fall in the company size of 20 - 49 employees (42 companies), 100 - 249 employees (31 companies), 250 - 499 employees (11 companies).
Employee Size
Close.io Customers by Geography
The top three geographies of Close.io for voip are the United States with 79(74.53%), Canada with 9(8.49%), Australia with 4(3.77%) customers respectively.
Customers
Employees of Close.io
Also see other Products/Services by Close.io in:
FAQ
Find answers to the most often asked questions by users.
Who are the top Close.io competitors?
Close.io’s Top competitors in the voip category are CallRail, Skype, Cisco WebEx. You can view a full list of Close.io competitors here. 6sense uses advanced data mining and AI algorithms to track customers and competitors of Close.io and 40,000 other technologies on the internet. You can also compare Close.io and its feature with top competitors here : Close.io vs CallRail Close.io vs Skype Close.io vs Cisco WebEx.
What is Close.io customer distribution based on company size?
What is Close.io market share in the voip?
What are the top countries that use Close.io?
What are the top industries that use Close.io?
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