The VoIP service providers industry focuses on transforming how businesses communicate. These companies deliver voice, video, and messaging solutions through internet technology, cutting costs and improving efficiency. Recent advancements like AI integration and cloud-based services are reshaping the industry, making it adaptable and cost-effective. With a growing emphasis on remote work, VoIP solutions are increasingly pivotal in ensuring seamless business continuity. As businesses look for scalable options, companies are focusing on user-friendly interfaces and enhanced cyber security to maintain customer trust. The market is also expanding to cater to previously underserved regions, driven by the demand for digital communication solutions.

This listing includes various VoIP service providers ranging from small startups to larger operations, some founded during the tech boom of the early 2000s. They operate from locations such as the USA, UK, Canada, and Brazil, showcasing a broad geographical reach. Most companies have between 11 and 500 employees, indicating a balance between personalized service and operational capacity. With offerings like cloud PBX, call management solutions, and security features, these providers aim to address the unique needs of their clients across multiple sectors, enhancing communication and connectivity.

Read on to discover the top VoIP service providers companies.

Top 23 VoIP Services Companies

1. Vonage

• Website: vonage.com
• Ownership type: Corporate
• Headquarters: Holmdel, New Jersey, United States (USA)
• Employee distribution: United States (USA) 42%, United Kingdom (UK) 20%, Poland 10%, Other 28%
• Latest funding: $6.2B, November 2021
• Founded year: 2001
• Headcount: 1001-5000
• LinkedIn: vonage

Vonage Holdings Corp., founded in 2001 and headquartered in Holmdel, New Jersey, is a cloud communications provider that specializes in telecommunications services, particularly VoIP and unified communications. The company offers a range of solutions designed to improve communication processes for businesses across various sectors. Their product lineup includes communications APIs, contact center solutions, and unified communications services, which help organizations streamline their operations and enhance customer interactions. Vonage has a significant global footprint, with a workforce distributed across the United States, the United Kingdom, Poland, India, and Israel. In November 2021, Vonage secured $6.2 billion in funding, reflecting strong market confidence in their innovative approach to cloud communications. The company has also been recognized for its contributions to the industry, being named a leader in the 2024 Gartner Magic Quadrant for CPaaS, which highlights its commitment to delivering effective communication solutions.

2. Zadarma

• Website: zadarma.com
• Ownership type: Private
• Headquarters: London, England, United Kingdom (UK)
• Employee distribution: Poland 25%, Spain 25%, Kazakhstan 12%, Other 38%
• Founded year: 2006
• Headcount: 51-200
• LinkedIn: zadarma

Zadarma is a telecommunications company based in London, England, founded in 2006. The company specializes in VoIP services and virtual phone systems, providing a range of products designed to enhance business communication. Their offerings include Cloud PBX, SIP trunking, and a multifunctional CRM system known as Teamsale CRM. Zadarma primarily targets small businesses and enterprises, aiming to deliver cost-effective communication solutions that improve efficiency. With a global footprint, the company serves over 2 million registered users in 160 countries, showcasing its ability to cater to a wide audience. Zadarma's services are designed to be user-friendly, allowing clients to set up their business phone systems quickly and without the need for extensive hardware. The company also emphasizes customer support, offering assistance in multiple languages and ensuring that users can access help whenever needed.

3. Voipfone

• Website: voipfone.co.uk
• Ownership type: Private
• Headquarters: Southend-On-Sea, England, United Kingdom (UK)
• Employee distribution: United Kingdom (UK) 100%
• Founded year: 2004
• Headcount: 11-50
• LinkedIn: voipfone

Voipfone, based in Southend-On-Sea, England, is a telecommunications company that specializes in VoIP phone services and broadband solutions. Established in 2004, Voipfone caters to both residential and business customers, providing a range of services that include cloud PBX, call forwarding, and a softphone application. The company is recognized for its award-winning customer support, having won the Best VoIP award from the Internet Service Providers Association (ISPA) for five consecutive years. Voipfone's services are designed to facilitate a smooth transition from traditional landline systems to modern VoIP solutions, making it an attractive option for users looking to maintain their existing phone numbers amid industry changes. With a focus on flexibility and user control, Voipfone allows customers to tailor their plans to meet specific needs, further enhancing its appeal in the competitive VoIP market.

4. Iristel

• Website: iristel.com
• Ownership type: Private
• Headquarters: United States (USA)
• Employee distribution: Canada 78%, Romania 22%
• Founded year: 1999
• Headcount: 51-200
• LinkedIn: iristel

Iristel is a telecommunications provider based in the United States, established in 1999. The company specializes in a wide array of business communication solutions, prominently featuring VoIP services, unified communications, and cybersecurity measures. Iristel serves businesses across multiple sectors, helping them improve their communication capabilities while also addressing cybersecurity threats. As a competitive local exchange carrier (CLEC), Iristel provides essential services such as cloud calling, SIP trunking, and managed cybersecurity solutions. The company has a significant presence in the market, with a reported 15 million phone numbers provided internationally and a network uptime of 99.999%. Iristel's commitment to innovation and service quality has earned them recognition, including a nomination for Markham's 2024 Business Excellence Award. Their employee distribution shows a strong presence in Canada, with a smaller team in Romania, reflecting their operational reach.

5. Telone Zimbabwe (Pvt) Ltd

• Website: telone.co.zw
• Ownership type: Private
• Headquarters: Harare, Harare, Zimbabwe
• Employee distribution: Zimbabwe 99%
• Founded year: 1980
• Headcount: 1001-5000
• LinkedIn: telone-zimbabwe-pvt-ltd

Telone Zimbabwe (Pvt) Ltd, founded in 1980 and based in Harare, is a private telecommunications company that provides a wide range of services, including broadband internet and Voice over Internet Protocol (VoIP). With a workforce of approximately 1,170 employees, Telone serves both residential and business customers across Zimbabwe. The company leverages its extensive fixed-line network to deliver reliable connectivity and communication solutions. Recently, Telone has intensified its VoIP rollout, positioning itself as a significant player in the VoIP market. Their VoIP services are designed to enhance communication for businesses, offering features that integrate voice and data traffic, thereby improving operational efficiency. Telone's commitment to innovation in telecommunications is evident in their ongoing efforts to upgrade their service offerings and infrastructure.

6. VoxSun Telecom

• Website: voxsun.com
• Ownership type: Private
• Headquarters: Montreal, Quebec, Canada
• Employee distribution: Canada 100%
• Founded year: 2010
• Headcount: 11-50
• LinkedIn: voxsun-telecom-inc.

VoxSun Telecom, based in Montreal, Quebec, Canada, is a private telecommunications provider that has been operational since 2010. The company specializes in VoIP services and cloud-based communication solutions, primarily targeting businesses and mobile professionals. VoxSun offers a range of services including business phone systems, internet plans, and video conferencing, all designed to enhance productivity while reducing costs. They operate without contracts, providing clients with flexibility and the ability to scale services as needed. VoxSun is a member of the CRTC, which underscores its commitment to regulatory compliance and quality service delivery. The company utilizes its own network to ensure reliable and high-quality voice communications, making it a competitive player in the VoIP market.

7. Telappliant

• Website: telappliant.com
• Ownership type: Private
• Headquarters: London, England, United Kingdom (UK)
• Employee distribution: United Kingdom (UK) 79%, Sri Lanka 21%
• Founded year: 2003
• Headcount: 51-200
• LinkedIn: telappliant

Telappliant, founded in 2003 and based in London, is a private IT service provider that specializes in business IT, telecoms, and internet solutions. With a workforce of around 56 employees, the company has carved out a niche in managed IT services, cybersecurity, and cloud communications. Telappliant's offerings include a variety of VoIP solutions, such as SIP trunking and cloud phone systems, which cater to businesses looking to enhance their communication capabilities. They serve a wide array of sectors, including education, healthcare, and hospitality, demonstrating their adaptability to different industry needs. Their commitment to customer service is reflected in their positive client testimonials and their proactive approach to technology integration. Telappliant has not reported any funding, indicating a self-sustained growth model.

8. Telexperts - VoIP & IT Services

• Website: telexperts.net
• Ownership type: Private
• Headquarters: Winnipeg, Manitoba, Canada
• Employee distribution: Canada 85%, India 15%
• Founded year: 1985
• Headcount: 11-50
• LinkedIn: telexperts

Telexperts - VoIP & IT Services, based in Winnipeg, Manitoba, has been a significant player in the telecommunications industry since its founding in 1985. The company specializes in VoIP services and IT solutions, catering primarily to businesses in Manitoba. With a team of approximately 34 employees, Telexperts has successfully completed over 3,000 installations, demonstrating their expertise and reliability in the field. Their service offerings include Telexperts Cloud Voice, Mitel telephone systems, network audits, and hardware solutions, all designed to improve communication and operational efficiency for their clients. As a Mitel Gold Partner, Telexperts is well-equipped to deliver advanced communication systems and support, ensuring that their clients have access to the latest technology. The company prides itself on its customer-centric approach, aiming to build long-term partnerships and provide tailored solutions that meet the unique needs of each business.

9. Grupo UNION Telecom

• Website: uniontelecom.com.br
• Ownership type: Private
• Headquarters: Sao Paulo, Sao Paulo, Brazil
• Employee distribution: Brazil 100%
• Founded year: 2000
• Headcount: 51-200
• LinkedIn: union-telecomunica%c3%a7%c3%b5es

Grupo UNION Telecom, founded in 2000 and based in São Paulo, Brazil, is a private telecommunications company that specializes in providing a variety of communication solutions, including VoIP services and cloud telephony. With a workforce of approximately 54 employees, the company has developed a strong foothold in the Brazilian market, catering primarily to businesses across various sectors. Over the years, UNION Telecom has served around 11,500 clients, showcasing its ability to meet the communication needs of small, medium, and large enterprises. The company is recognized for its expertise and has established partnerships with notable brands such as Unify-Siemens and Digistar, which enhances its service offerings. Their portfolio includes services like SIP trunking, cloud PBX, and technical support, all aimed at improving communication efficiency while reducing costs for their clients. UNION Telecom is also ISO 9001 certified, reflecting its commitment to quality management and customer satisfaction.

10. ThinkTel Communications

• Website: thinktel.ca
• Ownership type: Private
• Headquarters: Toronto, Ontario, Canada
• Employee distribution: Canada 100%
• Latest funding: January 2012
• Founded year: 2003
• Headcount: 201-500
• LinkedIn: thinktel

ThinkTel Communications, based in Toronto, Ontario, is a private telecommunications provider that specializes in VoIP and SIP trunking services. Founded in 2003, the company has carved out a niche in delivering communication solutions tailored for small to medium-sized businesses and enterprises. Their service portfolio includes Hosted PBX, Dedicated Internet, and Managed Network Services, all designed to enhance operational efficiency and reduce costs for clients. ThinkTel's network spans across Canada, with points of presence in major cities such as Toronto, Montreal, Edmonton, and Vancouver. This extensive coverage allows them to offer reliable voice and data services nationwide. The company prides itself on its technical expertise, employing certified engineers and support specialists to ensure high-quality service delivery. ThinkTel also emphasizes customer control through its uControl portal, enabling clients to manage their accounts with ease. Their focus on SIP-based voice solutions and commitment to customer service positions them as a noteworthy player in the VoIP industry.

11. 4Com

• Website: 4com.co.uk
• Ownership type: Corporate
• Headquarters: Bournemouth, England, United Kingdom (UK)
• Employee distribution: United Kingdom (UK) 100%
• Latest funding: $267.8M, April 2024
• Founded year: 1999
• Headcount: 501-1000
• LinkedIn: 4com

4Com, founded in 1999 and based in Bournemouth, England, is a telecommunications company that focuses on delivering business phone systems and related services to small and medium-sized enterprises across the UK. The company offers a comprehensive suite of products, including VoIP systems, broadband services, and various software applications designed to enhance communication and connectivity for businesses. 4Com has established itself as a trusted partner for organizations looking to upgrade their communication infrastructure. They are particularly known for their HiHi phone systems, which integrate modern technology with traditional phone functionalities. Recently, 4Com secured significant funding, which underscores their growth trajectory and commitment to innovation in the telecommunications sector. Their emphasis on customer service and support has earned them recognition in the industry, making them a notable player in the VoIP market.

12. magicJack

• Website: magicjack.com
• Ownership type: Venture Capital
• Headquarters: West Palm Beach, Florida, United States (USA)
• Employee distribution: United States (USA) 82%, Israel 18%
• Latest funding: January 2010
• Founded year: 2007
• Headcount: 51-200
• LinkedIn: magicjack

magicJack, founded in 2007 and based in West Palm Beach, Florida, is a telecommunications company specializing in Voice over Internet Protocol (VoIP) services. The company provides users with the ability to make unlimited local and long-distance calls over the internet, catering primarily to consumers and small businesses seeking cost-effective communication solutions. Their product lineup includes the magicJack device, which connects to a high-speed internet connection, and the magicApp, a mobile application that allows users to make calls from their smartphones. magicJack has established itself as a player in the VoIP industry by offering competitive pricing and features such as voicemail, call forwarding, and caller ID. The company operates with a relatively small team and has a significant presence in the U.S. market, with a portion of its workforce based in Israel. Despite not having reported any recent funding, magicJack continues to innovate and adapt to the changing telecommunications landscape, maintaining its relevance in the VoIP market.

13. Over the Wire

• Website: overthewire.com.au
• Ownership type: Private
• Headquarters: Brisbane, Queensland, Australia
• Employee distribution: Australia 100%
• Founded year: 2007
• Headcount: 201-500
• LinkedIn: over-the-wire

Over the Wire is an IT service provider based in Brisbane, Queensland, Australia, founded in 2007. The company specializes in telecommunications solutions, offering a variety of services that include cloud solutions, business internet, VoIP, and IT support. Over the Wire primarily caters to businesses that require reliable and secure technology infrastructure. Their VoIP offerings include business VoIP, hosted PBX, and Microsoft Teams Calling, showcasing their commitment to providing comprehensive communication solutions. The company prides itself on delivering tailored services, ensuring that clients receive support that aligns with their unique operational needs. With a workforce of 201-500 employees, Over the Wire has established a solid presence in the Australian market, focusing on customer satisfaction and technical expertise. They have not reported any funding, indicating a self-sustained growth model.

14. VoIP Supply

• Website: voipsupply.com
• Ownership type: Corporate
• Headquarters: Amherst, New York, United States (USA)
• Employee distribution: United States (USA) 84%, Pakistan 5%, Bangladesh 5%, Other 5%
• Latest funding: June 2017
• Founded year: 2002
• Headcount: 11-50
• LinkedIn: voip-supply

VoIP Supply, founded in 2002 and based in Amherst, New York, is a telecommunications distributor that specializes in VoIP solutions. The company has built a reputation for providing a wide range of products, including VoIP phones, headsets, and cloud services, catering to businesses, consumers, and organizations alike. With a focus on customer service, VoIP Supply aims to deliver effective communication solutions tailored to various industries. Over the years, they have shipped more than 135,000 products globally, showcasing their operational scale and market reach. Their team of VoIP professionals is dedicated to helping customers implement and deploy VoIP communications effectively, ensuring that they receive the support and expertise needed to maximize their investment in technology.

15. VoIP.ms

• Website: voip.ms
• Ownership type: Private
• Headquarters: Terrebonne, Quebec, Canada
• Employee distribution: Mexico 64%, Canada 36%
• Founded year: 2007
• Headcount: 51-200
• LinkedIn: voip-ms

VoIP.ms, established in 2007 and headquartered in Terrebonne, Quebec, Canada, is a private telecommunications provider that specializes in Voice over Internet Protocol (VoIP) services. The company primarily targets businesses and organizations, offering a range of products that include call management and SMS integration. VoIP.ms is known for its customizable VoIP solutions, which can be integrated with platforms such as Microsoft Teams, enhancing communication efficiency for its users. With a workforce of approximately 51 to 200 employees, the company has a notable presence in both Canada and Mexico, with a significant portion of its workforce based in Mexico. VoIP.ms has not reported any funding, indicating a self-sustaining business model. The company actively engages with its user community through resources like a wiki and YouTube tutorials, further solidifying its commitment to customer support and education in the VoIP space.

16. VOIP.COM

• Website: voip.com
• Ownership type: Private
• Headquarters: Los Angeles, California, United States (USA)
• Employee distribution: Kuwait 100%
• Founded year: 2005
• Headcount: 51-200
• LinkedIn: voip

VOIP.COM, based in Los Angeles, California, is a private telecommunications company founded in 2005. It specializes in providing Voice over Internet Protocol (VoIP) services, which allow users to make and receive phone calls over the internet. The company offers a range of products, including VoIP phone service, unlimited calling, and advanced features such as voicemail-to-text and call recording. Targeting small business owners and consumers, VOIP.COM aims to deliver affordable communication solutions that leverage internet technology. The company operates primarily through internet-based platforms, enabling users to connect via various devices. With a workforce of approximately 287 employees, VOIP.COM has positioned itself as a relevant player in the VoIP industry, focusing on enhancing user experience and providing essential telecommunication services.

17. OnSIP

• Website: onsip.com
• Ownership type: Corporate
• Headquarters: New York, New York, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: $9.8M, September 2022
• Founded year: 2004
• Headcount: 51-200
• LinkedIn: junction-networks

OnSIP, based in New York City, is a telecommunications company that has been providing hosted VoIP services since its inception in 2004. The company focuses on delivering tailored business communication solutions, primarily aimed at small to medium-sized enterprises. OnSIP's offerings include customizable phone systems, video conferencing capabilities, and a variety of call management features designed to enhance operational efficiency. The company prides itself on its customer service, having received accolades for its support, which is a critical aspect of the VoIP industry. In September 2022, OnSIP secured $9.75 million in funding, reflecting its commitment to innovation and growth within the telecommunications sector. With over 100,000 businesses trusting their services, OnSIP continues to adapt and evolve to meet the needs of its clients in a competitive market.

18. Novanet

• Website: novanet.net
• Ownership type: Private
• Headquarters: New York, New York, United States (USA)
• Employee distribution: India 51%, Brazil 16%, Nigeria 16%, Other 16%
• Founded year: 2001
• Headcount: 51-200
• LinkedIn: novanet

Novanet is a telecommunications company based in New York, specializing in VoIP services since its founding in 2001. With a workforce of approximately 98 employees, the company has developed a reputation for reliability in the VoIP sector. Novanet's telephony network is designed to handle up to 10 million calls per day, catering primarily to businesses that require efficient and effective communication solutions. Their infrastructure is built to ensure 100% uptime, which is critical for organizations that depend on uninterrupted service. The company offers outbound calling capabilities to nearly every functional number globally, including local, national, and toll-free numbers in over 100 countries. Their advanced routing algorithms are optimized to provide high-quality call experiences, minimizing latency and packet loss. Novanet's commitment to customer service is highlighted by positive testimonials from clients, indicating a focus on addressing customer needs and enhancing operational efficiency.

19. NovoLink Communications

• Website: novolink.com
• Ownership type: Private
• Headquarters: Friendswood, Texas, United States (USA)
• Employee distribution: Brazil 100%
• Founded year: 2000
• Headcount: 51-200
• LinkedIn: novolink-communications

NovoLink Communications, Inc., founded in 2000 and based in Friendswood, Texas, is a telecommunications company that specializes in VoIP solutions and managed internet services. The company provides a range of services tailored to businesses of all sizes, including enterprise voice solutions, trunking, and security systems. NovoLink operates primarily through a cloud-based model, which allows clients to enjoy flexible and scalable communication solutions. Their offerings include hosted voice options, enterprise trunking, and advanced call management features, all designed to enhance communication efficiency and reduce costs. With a dedicated focus on VoIP technology, NovoLink aims to simplify management for businesses while ensuring high-quality service and support. Their commitment to maximizing VoIP investments through a hands-on approach further solidifies their position in the telecommunications industry.

20. netelip

• Website: netelip.com
• Ownership type: Private
• Headquarters: Spain
• Employee distribution: Spain 68%, Colombia 23%, Venezuela 9%
• Founded year: 2006
• Headcount: 51-200
• LinkedIn: netelip

netelip is a telecommunications provider based in Spain, founded in 2006. The company offers a variety of VoIP services, cloud communication solutions, and internet services specifically designed for businesses. Their product lineup includes SIP lines, virtual PBX systems, and fiber optic internet, catering to various sectors such as marketing and e-commerce. netelip operates on a subscription model, which allows clients to access services without the burden of long-term contracts. With a workforce of around 22 employees, the company has a significant presence in Spain, while also serving clients in Colombia and Venezuela. Their commitment to providing innovative communication solutions has made them a trusted partner for over 12,000 businesses, reflecting their active involvement in the telecommunications industry.

21. VoIPstudio.com

• Website: voipstudio.com
• Ownership type: Private
• Headquarters: London, England, United Kingdom (UK)
• Employee distribution: United Kingdom (UK) 33%, Spain 33%, Poland 33%
• Founded year: 2009
• Headcount: 11-50
• LinkedIn: voipstudio-com

VoIPstudio.com, founded in 2009 and based in London, England, is a private telecommunications company that specializes in providing cloud-based VoIP services. With a workforce of around 19 employees, the company has established itself as a player in the VoIP market, offering a range of communication solutions designed to enhance business operations. Their services cater to businesses of all sizes, focusing on cost-effective and reliable telephony solutions. VoIPstudio's product suite includes features such as call centers, unlimited call recording, virtual numbers, and advanced call control functionalities. The company has also integrated its services with popular applications and CRMs, streamlining workflows for its users. VoIPstudio has garnered positive customer reviews, reflecting its commitment to service quality and customer satisfaction. The absence of reported funding suggests a self-sustaining business model, which can be appealing to potential partners and clients looking for stability in their service providers.

22. RSTelecom

• Website: rstelecom.co.za
• Ownership type: Private
• Headquarters: South Africa
• Employee distribution: Brazil 61%, South Africa 26%, Pakistan 13%
• Founded year: 2009
• Headcount: 11-50
• LinkedIn: rstelecom

RSTelecom, founded in 2009, is a private telecommunications provider based in South Africa. With a workforce of approximately 30 employees, the company focuses on VoIP and hosted telephony solutions tailored for both home and business users. Their offerings include home VoIP solutions, number porting, VoIP line services, and a variety of business solutions such as SIP trunk services and teleconferencing. RSTelecom aims to provide cost-effective communication options, allowing customers to save significantly on call costs. They operate on a month-to-month basis, which provides flexibility and eliminates the need for long-term contracts. The company has established a customer base that includes residential users and small to medium enterprises, reflecting their commitment to meeting the communication needs of diverse clients. RSTelecom's services are designed to enhance connectivity while ensuring customer satisfaction through responsive support and tailored solutions.

23. Clarus Communications

• Website: clarusco.com
• Ownership type: Corporate
• Headquarters: St. Louis, Missouri, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: June 2021
• Founded year: 2001
• Headcount: 11-50
• LinkedIn: clarus-communications_2

Clarus Communications, based in St. Louis, Missouri, has been a player in the telecommunications sector since its founding in 2001. The company specializes in business phone systems and cloud services, with a strong emphasis on VoIP solutions. They offer a comprehensive suite of services that includes VoIP phone systems, hosted PBX systems, and call center systems, catering to businesses of all sizes. Clarus Communications prides itself on its ability to help clients reduce telecommunications costs while improving service quality. Their clientele spans multiple industries, reflecting their capability to adapt to various business needs. The company also engages in technology expense management, ensuring that clients can optimize their technology investments. With a dedicated team of telecommunications consultants, Clarus aims to provide tailored solutions that meet the specific requirements of their customers.

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