Company lists · Data verified August 2026

Top 25 Application security testing companies based in Brazil

Name: Application security testing companies based in Brazil
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 135 companies tracked

There are 135 application security testing companies headquartered in Brazil (RevenueBase, August 2026). RevenueBase tracks 1,235 professional contacts across them, including 392 with verified work emails and 23 with mobile numbers. Sao Paulo is the largest hub.

This list covers application security testing companies headquartered in 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.

135Companies

1,235Contacts tracked

392Verified emails

23Mobile numbers

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The 25 largest application security testing companies based in Brazil

Ranked by team size

Top 25 of 135 application security testing companies based in 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	Oplium	Rio De Janeiro	201-500	228	104
2	Under Protection	Pinhais Alphaville	51-200	125	57
3	Conviso Application Security	Curitiba	51-200	70	14
4	OL Tecnologia	Sao Paulo	51-200	68	23
5	Berghem	Sao Paulo	51-200	54	21
6	4win Tecnologia	Barueri	51-200	52	17
7	Viwsec	Barueri	11-50	51	10
8	Desec Security	Sao Paulo	n/a	36	8
9	Ibestsec Segurança DA Informação	Barueri	51-200	35	17
10	Pacific SEC	Belo Horizonte	51-200	34	15
11	Access Security	Barueri	11-50	20	5
12	Esecurity	Sao Paulo	11-50	18	4
13	Abctec	Sao Paulo	11-50	15	2
14	Symbioti	Ribeirao Preto	11-50	14	8
15	Cherokee	Sao Paulo	11-50	14	3
16	Vertros Technology And Security	Sao Paulo	11-50	13	5
17	RESH	Sao Paulo	11-50	13	4
18	Ksecurity	Sao Paulo	11-50	12	5
19	Resolvesec	Sao Paulo	11-50	11	4
20	Cyberone Segurança DA Informação	Belo Horizonte	11-50	10	7
21	Secure Tecnologia	Sao Paulo	11-50	10	5
22	Brztec	Sao Paulo	1-10	10	4
23	Xlabs Security	Sao Leopoldo	11-50	9	4
24	Guardsi Cybersecurity	Uberlandia	11-50	9	4
25	BR Flecha Cybersecurity	Sao Paulo	51-200	7	3

Showing 25 of 135 application security testing companies based in Brazil

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Application security testing companies based in Brazil at a glance

As of Aug 28, 2026

1-10Median size (employees)

Sao PauloLargest hub · 51 HQs

23Contacts with mobile numbers

2Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

Application security testing companies by metro

Metro	Companies
Application security testing companies in Sao Paulo	51
Application security testing companies in Rio De Janeiro	10
Application security testing companies in Belo Horizonte	8
Application security testing companies in Curitiba	6
Application security testing companies in Recife	4
Application security testing companies in Barueri	4
Application security testing companies in Sao Bernardo Do Campo	3
Application security testing companies in Florianopolis	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 “application security testing companies”, with match quality audited by blind human judging, and headquartered in 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; 2 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 application security testing companies are there based in Brazil?

There are 135 application security testing companies headquartered in Brazil as of August 2026 (RevenueBase).

What is the largest company on this list?

Oplium, headquartered in Rio De Janeiro, tops this list with the largest team on record.

Which city has the most application security testing companies?

Sao Paulo leads with 51 headquartered companies, followed by Rio De Janeiro (10) and Belo Horizonte (8).

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 392 verified decision-maker contacts tracked across these 135 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.