Company lists · Data verified August 2026

Top 12 Cloud communications companies based in Sao Paulo, Brazil

Name: Cloud communications companies based in Sao Paulo, Brazil
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 42 companies tracked

There are 42 cloud communications companies headquartered in Sao Paulo, Brazil (RevenueBase, August 2026). RevenueBase tracks 390 professional contacts across them, including 92 with verified work emails and 7 with mobile numbers. Sao Paulo is the largest hub.

This list covers cloud communications companies headquartered in Sao Paulo, Brazil, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

42Companies

390Contacts tracked

92Verified emails

7Mobile numbers

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The 12 largest cloud communications companies based in Sao Paulo, Brazil

Ranked by team size

Top 12 of 42 cloud communications companies based in Sao Paulo, Brazil, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Grupo Union Telecom	Sao Paulo	51-200	45	14
2	Alhambrait BR	Sao Paulo	201-500	37	14
3	Tellfree Brasil Telefonia IP S.A	Sao Paulo	51-200	32	2
4	Voice Technology	Sao Paulo	51-200	30	17
5	Fale Paco	Sao Paulo	51-200	28	3
6	United World Telecom	Sao Paulo	11-50	26	17
7	Base Telco	Sao Paulo	51-200	26	14
8	Voice Manager	Sao Paulo	11-50	7	5
9	OTIMI	Sao Paulo	11-50	6	2
10	RUBFY	Sao Paulo	1-10	5	1
11	Portalvoip	Sao Paulo	1-10	1	1
12	Duovox	Sao Paulo	1-10	1	1

Showing 12 of 42 cloud communications companies based in Sao Paulo, Brazil

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Cloud communications companies based in Sao Paulo, Brazil at a glance

As of Aug 28, 2026

11-50Median size (employees)

Sao PauloLargest hub · 42 HQs

7Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Cloud communications companies by metro in Brazil

Metro	Companies
Cloud communications companies in Sao Paulo	42
Cloud communications companies in Curitiba	7
Cloud communications companies in Cascavel	4
Cloud communications companies in Porto Alegre	4
Cloud communications companies in Rio De Janeiro	3
Cloud communications companies in Ribeirao Preto	3
Cloud communications companies in Recife	3
Cloud communications companies in Barueri	3

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “cloud communications companies”, with match quality audited by blind human judging, and headquartered in Sao Paulo, Brazil.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Contact records re-verify on a rolling cadence; 0 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many cloud communications companies are there based in Sao Paulo, Brazil?

There are 42 cloud communications companies headquartered in Sao Paulo, Brazil as of August 2026 (RevenueBase).

What is the largest company on this list?

Grupo Union Telecom, headquartered in Sao Paulo, tops this list with the largest team on record.

Which city has the most cloud communications companies?

Sao Paulo leads with 42 headquartered companies, followed by Curitiba (7) and Cascavel (4).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 92 verified decision-maker contacts tracked across these 42 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph, the same data that powers RevenueBase's B2B data products and the free research portal.