| # | Company | Employees |
|---|---|---|
| 1 |
Claro Brasilclaro.com.br
A leading provider of connectivity infrastructure, offering innovative entertainment, finance, and industrial solutions with a focus on sustainability and social impact |
43,065 |
| 2 |
Icomon Tecnologia Ltdaicomontecnologia.com.br
Specializing in technology and telecommunications for over 30 years, serving major operators in São Paulo with a focus on maximizing processes and implementing cutting-edge solutions |
6,829 |
| 3 |
NET Oficialclaro.com.br
A leading telecommunications provider in Brazil, offering TV, 45G, and broadband services, in partnership with Claro Brasil for a seamless customer experience |
6,100 |
| 4 |
Alloha Fibraalloha.com
Leading independent fiber optic company providing connectivity solutions across Brazil for consumers and businesses, focused on digital inclusion and social development. |
5,084 |
| 5 |
Vikstar Contact Centervikstar.com.br
Leading Brazilian contact center with over 5,000 employees in São Paulo and Piauí, specializing in telecommunications market solutions and customized program development |
4,299 |
| 6 |
Nextel Brasilclaro.com.br
Started in 1997, then acquired by Claro in 2019. Now operates as Claro nxt, providing an enhanced experience to customers in Brazil. |
3,571 |
| 7 |
Procisa do Brasilprocisa.com.br
A Mexican telecommunications company part of Grupo CARSO, operating in Brazil, Mexico, Chile, Ecuador, and Argentina Present in multiple states in Brazil |
3,416 |
| 8 |
Veroquerovero.com.br
Brazilian telecommunications company providing quality service in over 450 cities across Minas Gerais, Center-West, South and Southeast regions. |
3,278 |
| 9 | 2,120 | |
| 10 |
VIVO Empresasvivointerior.com.br
A telecom company in Sao Paulo offering tailored solutions with the best coverage, products, and services to simplify processes and reduce costs for clients |
1,826 |
| 11 |
Alares Internetalaresinternet.com.br
A telecommunications business offering broadband internet, fiber optics, TV, and landline services across multiple states in Brazil, with a focus on growth and customer satisfaction |
1,675 |
| 12 |
Liderança Cobranças Inteligenteseuemdia.com.br
With over 23 years of experience, the company specializes in active debt collection, both internally and nationally, focusing on high efficiency and excellence in portfolio recovery |
1,624 |
| 13 |
TLPtlpservicos.com.br
A leading telecommunications provider with over 26 years of experience, offering comprehensive solutions for clients in Brazil with a focus on quality and cost-effective services |
1,595 |
| 14 |
VOXLINE Contact Centervoxline.com.br
With a unique management model and cutting-edge technology, this contact center converts contacts into opportunities, recognized as one of the best in the Brazilian market |
1,356 |
| 15 |
Líder Telecom Ltda.lidertel.com.br
A provider of technical and operational services for corporate data, video, and sound networks, specializing in wireless, radio, and physical cable technologies |
1,310 |
| 16 |
Brasil TecParbrasiltecpar.com.br
A group in Brazil focused on consolidating the Internet, Technology, and Telecom market with over 25 years of experience and achievements |
1,214 |
| 17 |
EGS- Ericsson Gestão e Serviços.egs.com.br
A network rollout and operation plant outsourcing group with regional offices across Brazil, established as a subsidiary of Ericsson in 2004 |
1,074 |
| 18 |
Editora Abriltva.com.br
Specializes in the editorial market, focusing on content creation and distribution A reputable player in the publishing industry with a strong presence |
1,027 |
| 19 |
Ondacom Serviços de Telecomunicaçõesondacom.com
Global telecommunications infrastructure leader specializing in integrated solutions, driving market growth and expansion worldwide |
928 |
| 20 |
Mundivox Communicationsmundivox.com
With over 20 years in the telecommunications market, this company offers integrated voice and data communication solutions for corporate clients across multiple cities, prioritizing customer relationships |
831 |
| 21 |
RM Telecomlinkedin.com
Specializing in telecommunications services, RM Telecom provides a wide range of solutions to meet the communication needs of individuals and businesses |
788 |
| 22 |
Huawei Brasilhuawei.com
Global leader in ICT solutions, focusing on telecommunications, devices, and cloud computing Committed to creating value for telecom operators, businesses, and consumers worldwide |
775 |
| 23 |
SAMMsamm.com.br
A national telecommunications company specializing in internet access, long-distance transport links, high-capacity services, and customized telecom solutions for corporate clients |
556 |
| 24 |
CARSO INSTALAÇÕES DO BRASIL LTDA
A multinational company specializing in cable TV, phone, and internet installations, aiming to become a leader in the industry Founded in 2019 with 1000 employees |
500 |
| 25 |
Alpitel Brasilalpitelbrasil.com.br
Specializing in energy and telecommunications, this company brings Italian expertise to Brazil with project management, technical coordination, and nationwide operational capabilities |
470 |
| 26 |
Winitywinity.com.br
A provider of wireless infrastructure, mobile coverage solutions, and new connectivity technologies for telecommunications sector, focusing on expanding and enhancing connectivity |
424 |
| 27 |
Surfsurf.com.br
The company aims to revolutionize the lives of underserved Brazilians in the telecom and financial sectors by offering fair, transparent products through partnerships |
407 |
| 28 |
Tim Celular
Tim Celular provides telecommunications services in São Paulo, Brazil, specializing in mobile communication solutions at Avenida Giovanni Gronchi 7143 |
400 |
| 29 |
Motorola Brasilmotorola.com.br
Design and manufacture mobile devices and solutions under the Moto and Motorola brands, as a subsidiary of Lenovo Group Holdings |
364 |
| 30 |
Vikstarvikstar.com.br
Specializing in People Development, Technology Investment, and Customer Satisfaction, the Grupo Vikstar is built on these core pillars |
346 |
| 31 |
Beecenter Soluções em Call Center LTDA
A BPO specializing in telecustomer service, with a focus on quality, expertise in technical support, retention, sales, chat and social media |
315 |
| 32 |
VIVO Empresas Commcentersoliciteumcontato.com.br
The largest exclusive reseller of a major telecommunications operator in Brazil, providing personalized service to nearly two million customers Offering solutions for digital transformation and competitive advantages |
304 |
| 33 |
GloballVox Telecomunicações e Tecnologiagloballvox.com.br
A telecommunications provider offering services such as TV, broadband, phone, structured cabling, and call center services, with a focus on continuous improvement |
297 |
| 34 |
ALCON ENGENHARIA DE SISTEMASaldaktecnologia.com.br
Leading radio communication systems integrator in Brazil with headquarters in São Paulo and branches in Curitiba, Itabira, Nova Lima, Parauapebas, and Vitória |
293 |
| 35 |
Rontan
Provider of Motorola communication solutions including radios, accessories, broadband products, and digital systems Specializes in critical communication solutions for public safety sector |
208 |
| 36 | 194 | |
| 37 |
Vogel Telecomvogeltelecom.com
Provider of high-capacity connectivity services for B2B and wholesale markets, now offering integrated solutions in Telecom and IT, including cloud and security services |
177 |
| 38 |
Vonexvonex.com.br
Leader in telecommunications innovation offering comprehensive communication solutions and services including voice, VoIP, data, and call center solutions tailored to each client's needs |
161 |
| 39 |
HIT Communicationshitcommunications.com
A multinational with a presence in Latin America offering cutting-edge technology and quality voice and data services with innovative customer support |
148 |
| 40 |
ZTE do Brasilzte.com.cn
Global leader in communication and information technology, providing innovative solutions for telecom industry in Brazil, including 5G, IoT, data centers, and more |
148 |
| 41 |
Highlinehighline.com.br
Specializing in infrastructure for cellular telecommunication, the company constructs and maintains structures for signal projection, including towers, rooftops, and indoor locations |
146 |
| 42 |
55PBX | Telecom e PABX na nuvem55pbx.com
A cloud-based phone system solution offering intelligent automated assistance, predictive dialing, CRM integration, and audio transcription for enhancing customer interactions and operations |
100 |
| 43 |
Correios Celularcorreioscelular.com.br
This page is the official channel for Correios Celular, managed by Surf Group in partnership with Correios, offering mobile services |
70 |
| 44 |
HTCOM - AN INNOVATIVE THINKING COMPANY!htcom.com.br
An independent provider offering technology solutions for Telecom, IT, Enterprise, and Mobile APP markets with a focus on customer needs and excellence |
58 |
| 45 | 45 |
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Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Oct 9, 2026.
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