Where is CallTower located?

CallTower is headquartered in Salt Lake City, United States. It is registered at South Jordan, Utah.

How many employees does CallTower have?

As of Apr 30, 2026, the latest employee count at CallTower is 247.

Is CallTower a funded company?

CallTower is a funded company, having raised an undisclosed amount across 3 funding rounds to date. The company's 1st funding round was a $***** Conventional Debt round.

When was the latest funding round of CallTower?

CallTower's latest funding was a $***** Seed round on Apr 02, 2026, with participation from 1 investor.

Where does CallTower rank among its competitors?

CallTower ranks 12th amongst 980 active competitors, of which 34 are funded. It stands 11th in terms of total funding among its competitors. The most recent competitor to raise funding was CallTower, which secured an undisclosed amount in Apr, 2026.

Who are the top competitors of CallTower?

CallTower's top competitors include Vonage, 1&1 IONOS and Phone.com. Among them, CallTower secured the most recent funding round in April, 2026.

CallTower - 2026 Company Profile, Team, Funding & Competitors

CallTower is a seed company based in Salt Lake City (United States), founded in 2002 by Bob Barnes. It operates as a Cloud based business telephony and call center solutions provider. CallTower has raised an undisclosed amount in funding. The company has 980 active competitors, including 34 funded and 169 that have exited. Its top competitors include companies like Vonage, 1&1 IONOS and Phone.com.

Company Details

Cloud-based business telephony and call center solutions provider. It offers local and long-distance VoIP telephony with hosted PBX (with custom calling features including voicemail, call forwarding, voice to text translation, call hold, 911 service, call park, auto-attendant, etc), hosted unified communications, email hosting, instant messaging, web & video conferencing, MPLS, SIP trunking, dedicated lines, monitoring, and support services. It provides these hosted voice solutions through partnerships with Microsoft and Cisco. It also provides call center solutions. It has won multiple awards including the Internet Telephony Hosted VoIP Excellence Award by TMC in 2016, Internet Telephony Skype for Business Pioneer Award by TMC in 2015, etc. It has acquired SoundConnect and Appia Communications to expand its offerings.

Website: calltower.com
Social
Phone Number: +1 **********
Registered Address: South Jordan, Utah

Key Metrics

Founded Year

2002

Location

Salt Lake City, United States

Stage

Seed

Latest Funding Round

Seed, Apr 02, 2026, $*****

Investors

AllianceBernstein & 4 more

Ranked

12^th among 980 active competitors

Employee Count

247 as on Apr 30, 2026

Investment & Acquisitions

Inoria & 3 more

Similar Companies

Vonage & 1523 more

View CallTower's full profile

CallTower is associated with 1 legal entity given below:

Legal Entity Name	Date of Incorporation	Revenue	Latest Employee Count	Documents
CALLTOWER, INC. CIN: 943411257 , United States, Active	Nov 15, 2001	-	178 (As on Dec 31, 2024)	-

CallTower has raised funding over 3 rounds. Its latest funding round was a Seed round on Apr 02, 2026 for $*****. 1 investor participated in its latest round. CallTower has 5 institutional investors.

Here is the list of recent funding rounds of CallTower:

Date of Funding	Funding Amount	Round Name	Post-Money Valuation	Revenue Multiple	Lead Investors	Other Investors
Apr 02, 2026	9624913	Seed	8640681	3892493	8625984	4918586
Nov 16, 2023	3050121	Seed	1652767	6612475	3750255	BV Investment Partners & 2 more

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View details of CallTower's funding rounds and investors

The founders of CallTower is Bob Barnes. Bret England is the CEO of CallTower.

Here are the details of CallTower's key team members:

Bob Barnes: Co-Founder, EVP Sales, Marketing & Business Dev. of CallTower.
Bret England: CEO of CallTower.
Contact Info: 1 email address

View details of CallTower's Founder profiles and Board Members

CallTower's employee count trend

CallTower has 247 employees as of Apr 26. Here is CallTower's employee count trend over the years:

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Top competitors of CallTower include Vonage, 1&1 IONOS and Phone.com. Here is the list of Top 10 competitors of CallTower, ranked by Tracxn score:

Rank	Company Details	Short Description	Total Funding	Investors	Tracxn Score
1st	Vonage 2001, Holmdel (United States), Acquired	Provider of contact center business communication solutions	$645M	New Enterprise Associates, 3i Group & 15 others	74/100
2nd	1&1 IONOS 1988, Chesterbrook (United States), Public	Provider of cloud infrastructure & hosting services	$19.5M	United Internet, Lakestar & 3 others	74/100
3rd	Phone.com 2008, Newark (United States), Acquired	Offers phone services for small businesses	$2M	New Jersey Economic Development Authority, Lightspeed Venture Partners ... & 6 others	72/100
4th	TPx Communications 1998, Los Angeles (United States), Acquired	Managed IT and Business communication services provider	$308M	Investcorp, Point Financial & 9 others	68/100
5th	Aureon 1988, West Des Moines (United States), Acquired	Midwest-based provider of connectivity, IT, consulting, and contact center solutions	$50.8M	Sprout Group, Atlas Venture & 1 others	65/100
6th	Fusion Telecommunications 1997, New York City (United States), Public	Ip based digital Voice and Data communication platforms	-	Morgan Stanley, Ripple Capital & 9 others	63/100
7th	altafiber 2021, Cincinnati (United States), Series D	Provider of voip, internet, tv, and other services	$600M	Ares Management, Macquarie & 1 others	62/100
8th	Tango Networks 2005, Frisco (United States), Series C	Enterprise mobility,mobile business continuity and Mobile call forwarding solutions for service providers and enterprises.	$103M	Signature Capital, TWJ Capital & 5 others	61/100
9th	Zadarma 2006, Seattle (United States), Unfunded	Cloud communication solutions provider offering virtual phone systems and related services	-	-	61/100
10th	West Technology Group 1986, Omaha (United States), Acquired	Provider of cloud-based technology delivering AI-driven omnichannel communication and automation solutions	-	BofA Securities, Deutsche Bank & 8 others	59/100
12th	CallTower 2002, Salt Lake City (United States), Seed	Cloud based business telephony and call center solutions provider	-	AllianceBernstein, BV Investment Partners ... & 3 others	58/100

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CallTower has not made any investments yet. CallTower has made 4 acquisitions.

Here is the list of latest three $acquisitions:

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Date of Investment/Acquisition	Type	Company Name	Founded Year	Location
Jan 09, 2025	Acquisition	Inoria		Montreal (Canada)
Mar 03, 2022	Acquisition	OneStream Networks	2004	Rochester (United States)
Mar 06, 2018	Acquisition	BroadRiver	1987	Atlanta (United States)