T-Systems is a service provider for information technologies and digital transformation.
Current Customer(s)
Market Share (Est.)
Ranking
The top three of T-Systems’s competitors in the VoIP category are CallRail with 27.55%, Skype with 23.29%, Cisco WebEx with 13.93% market share.
Popular Comparisons
The top three of T-Systems’s competitors in the VoIP category are CallRail with 27.55%, Skype with 23.29%, Cisco WebEx with 13.93% market share.
T-Systems vs CallRail
T-Systems vs Skype
T-Systems vs Cisco WebEx
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Around the world in 2025, over 824 companies have started using T-Systems as VoIP tool.
Customers | Employee Range | City | Region | Country | Social Links |
---|---|---|---|---|---|
Kerry Group | 10,000+ | Beloit | Wisconsin | United States | |
Cognizant | 10,000+ | Teaneck | New Jersey | United States | |
Persistent | 10,000+ | Pune | Maharashtra | India | |
Progressive Insurance | 10,000+ | Cleveland | Ohio | United States | |
Univar Solutions | 10,000+ | Downers Grove | Illinois | United States | |
Manpower | 10,000+ | Milwaukee | Wisconsin | United States | |
Nokia | 10,000+ | Espoo | Uusimaa | Finland | |
Flex | 10,000+ | Austin | Texas | United States | |
VMware | 10,000+ | Palo Alto | California | United States | |
Poly | 10,000+ | Palo Alto | California | United States |
The top three products and services offering customers that use T-Systems for VoIP are Cloud Services (58), Managed Services (36), Consulting (36).
Customers
The majority of T-Systems's customers for the voip category fall in the company size of 10,000+ employees (201 companies), 100 - 249 employees (115 companies), 1,000 - 4,999 employees (106 companies).
Employee Size
The top three geographies of T-Systems for voip are the United States with 247(37.31%), Germany with 121(18.28%), United Kingdom with 62(9.37%) customers respectively.
Customers
Find answers to the most often asked questions by users.
Who are the top T-Systems competitors?
T-Systems’s Top competitors in the voip category are CallRail, Skype, Cisco WebEx. You can view a full list of T-Systems competitors here. 6sense uses advanced data mining and AI algorithms to track customers and competitors of T-Systems and 40,000 other technologies on the internet. You can also compare T-Systems and its feature with top competitors here : T-Systems vs CallRail T-Systems vs Skype T-Systems vs Cisco WebEx.
What is T-Systems customer distribution based on company size?
What is T-Systems market share in the voip?
What are the top countries that use T-Systems?
What are the top industries that use T-Systems?
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