Company lists · Data verified August 2026

Top 14 Api security companies based in Dallas, United States

Name: Api security companies based in Dallas, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

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

There are 28 api security companies headquartered in Dallas, United States (RevenueBase, August 2026). RevenueBase tracks 492 professional contacts across them, including 171 with verified work emails and 223 with mobile numbers. New York is the largest hub.

This list covers api security companies headquartered in Dallas, United States, 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.

28Companies

492Contacts tracked

171Verified emails

223Mobile numbers

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The 14 largest api security companies based in Dallas, United States

Ranked by team size

Top 14 of 28 api security companies based in Dallas, United States, 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	At&t Cybersecurity	Dallas, TX	1,001-5,000	158	29
2	Zyston LLC	Dallas, TX	51-200	69	44
3	Apollo Information Systems	Dallas, TX	51-200	63	40
4	Miller Jones, INC	Dallas, TX	201-500	32	7
5	Blacklake Security	Dallas, TX	51-200	28	25
6	Upstart Cyber	Dallas, TX	11-50	16	12
7	Digital Warfare	Dallas, TX	11-50	5	2
8	Birch Cline Cybersecurity	Dallas, TX	11-50	4	3
9	Strafe Cybersecurity	Dallas, TX	1-10	4	2
10	Method Cyber Security	Dallas, TX	1-10	3	2
11	Jemurai	Dallas, TX	1-10	3	1
12	Black ARC Security	Dallas, TX	1-10	3	1
13	DL Cyber	Dallas, TX	1-10	2	2
14	Slva Cybersecurity	Dallas, TX	1-10	2	1

Showing 14 of 28 api security companies based in Dallas, United States

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Api security companies based in Dallas, United States at a glance

As of Aug 28, 2026

11-50Median size (employees)

New YorkLargest hub · 40 HQs

223Contacts with mobile numbers

3Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Api security companies by metro in the United States

Metro	Companies
Api security companies in New York	40
Api security companies in San Francisco	32
Api security companies in Austin	31
Api security companies in Dallas	28
Api security companies in Miami	26
Api security companies in Houston	26
Api security companies in Chicago	25

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 “api security companies”, with match quality audited by blind human judging, and headquartered in Dallas, United States.
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; 3 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 api security companies are there based in Dallas, United States?

There are 28 api security companies headquartered in Dallas, United States as of August 2026 (RevenueBase).

What is the largest company on this list?

At&t Cybersecurity, headquartered in Dallas, tops this list with the largest team on record.

Which city has the most api security companies?

New York leads with 40 headquartered companies, followed by San Francisco (32) and Austin (31).

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 171 verified decision-maker contacts tracked across these 28 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.