CallTower
CallTower provides cloud-based enterprise-class unified communications solutions for organizations worldwide.
Market Share of CallTower
Current Customer(s)
41
Market Share (Est.)
0.22%
Ranking
#44
Top Competitors and Alternatives of CallTower
The top three of CallTower’s competitors in the Cloud Business Telephony category are Cisco Jabber with 16.55%, Avaya IP Office with 10.98%, Avaya Aura with 6.99% market share.
| Technology | Domains | Market Share (Est.) | Versus page |
|---|---|---|---|
| Cisco Jabber | 3102 | 16.55% | CallTower vs Cisco Jabber |
| Avaya IP Office | 2057 | 10.98% | CallTower vs Avaya IP Office |
| Avaya Aura | 1310 | 6.99% | CallTower vs Avaya Aura |
| Avaya CMS | 1232 | 6.57% | CallTower vs Avaya CMS |
| FreePBX | 1195 | 6.38% | CallTower vs FreePBX |
| Nortel Meridian | 1022 | 5.45% | CallTower vs Nortel Meridian |
| Spoken Communications | 691 | 3.69% | CallTower vs Spoken Communications |
| Toky | 645 | 3.44% | CallTower vs Toky |
| Rohde Schwarz | 635 | 3.39% | CallTower vs Rohde Schwarz |
| Crown Castle | 454 | 2.42% | CallTower vs Crown Castle |
| Loop Communications | 444 | 2.37% | CallTower vs Loop Communications |
| VICIdial | 432 | 2.30% | CallTower vs VICIdial |
| OnSIP | 404 | 2.16% | CallTower vs OnSIP |
| Metaswitch | 403 | 2.15% | CallTower vs Metaswitch |
| Sonetel | 387 | 2.06% | CallTower vs Sonetel |
| Digium | 277 | 1.48% | CallTower vs Digium |
| JustCall | 245 | 1.31% | CallTower vs JustCall |
| Zoom Phone | 214 | 1.14% | CallTower vs Zoom Phone |
| Lumen Technologies | 198 | 1.06% | CallTower vs Lumen Technologies |
| Exotel | 190 | 1.01% | CallTower vs Exotel |
Popular Comparisons
Top Competitors and Alternatives of CallTower
The top three of CallTower’s competitors in the Cloud Business Telephony category are Cisco Jabber with 16.55%, Avaya IP Office with 10.98%, Avaya Aura with 6.99% market share.
CallTower vs Cisco Jabber
CallTower vs Avaya IP Office
CallTower vs Avaya Aura
CallTower vs Avaya CMS
CallTower vs FreePBX
CallTower vs Nortel Meridian
CallTower vs Spoken Communications
CallTower vs Toky
Customers of CallTower
Around the world in 2026, over 41 companies have started using CallTower as Cloud Business Telephony tool.
| Customers | Employee Range | City | Region | Country | Social Links |
|---|---|---|---|---|---|
| Apex Systems | 10,000+ | Glen Allen | Virginia | United States |     |
| Cisco | 10,000+ | San Jose | California | United States | |
| University Of Oklahoma | 10,000+ | Norman | Oklahoma | United States | |
| WIS International | 10,000+ | Plano | Texas | United States | |
| Microsoft | 10,000+ | Redmond | Washington | United States | |
| Weichert Realtors | 10,000+ | Morris Plains | New Jersey | United States | |
| ROI CX Solutions | 5,000 - 9,999 | American Fork | Utah | United States | |
| Genesys | 5,000 - 9,999 | Menlo Park | California | United States | |
| Zoom | 5,000 - 9,999 | San Jose | California | United States | |
| MaxLinear | 1,000 - 4,999 | Carlsbad | California | United States | |
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CallTower Customers by Products and Services
The top three products and services offering customers that use CallTower for Cloud Business Telephony are Cybersecurity (4), Ucaas (3), Microsoft Teams (3).
Customers
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CallTower Customers by Employee Size
The majority of CallTower's customers for the cloud-business-telephony category fall in the company size of 100 - 249 employees (12 companies), 10,000+ employees (7 companies), 1,000 - 4,999 employees (5 companies).
Employee Size
CallTower Customers by Geography
The top three geographies of CallTower for cloud-business-telephony are the United States with 39(95.12%), Italy with 1(2.44%), France with 1(2.44%) customers respectively.
Customers
Employees of CallTower
Also see other Products/Services by CallTower in:
FAQ
Find answers to the most often asked questions by users.
Who are the top CallTower competitors?
CallTower’s Top competitors in the cloud-business-telephony category are Cisco Jabber, Avaya IP Office, Avaya Aura. You can view a full list of CallTower competitors here. 6sense uses advanced data mining and AI algorithms to track customers and competitors of CallTower and 40,000 other technologies on the internet. You can also compare CallTower and its feature with top competitors here : CallTower vs Cisco Jabber CallTower vs Avaya IP Office CallTower vs Avaya Aura.
What is CallTower customer distribution based on company size?
What is CallTower market share in the cloud-business-telephony?
What are the top countries that use CallTower?
What are the top industries that use CallTower?
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