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Cyber Security Firms

Best Cyber Security Firms in Dallas

Dallas is Dallas-Fort Worth, a corporate headquarters market with airlines, telecoms, banking and a large mid-market that buys managed detection and incident response retainers. The firms on this list were checked the same way as every list on the site. Rank one is the best overall, ranks two to four are the best for small business, managed detection and compliance work, and the rest cleared the same checks.

10 firms ranked17 evaluatedChecked
  1. 01Best overall
  2. 02Best for small business
  3. 03Best for managed detection
  4. 04Best for compliance
  5. 05+The rest of the shortlist, ranked on the same checks
Rank 01
Critical Start logo

Critical Start

Best overall

A Plano firm that sells managed detection and response as its main business, from its own security operations center.

Checked
Why they are on this list
  • Founded in Plano in 2012 by practitioners who had run incident response and threat hunting inside Fortune 500 companies, and still headquartered on Tennyson Parkway
  • Sells managed detection and response as the whole business rather than as an attachment to a helpdesk contract, with monitoring, investigation and response staffed every hour of every day
  • Its original security operations center sits at the Plano head office, so a North Texas buyer can ask to visit the room the alerts land in
  • Assigns a dedicated security team to each customer instead of running every account through one shared playbook, and says every incident response event is kept audit ready from day one
  • Names financial services, healthcare, manufacturing and utilities as its customer sectors, which are four of the industries that carry the North Texas mid-market
Founded
2012
Sectors
Financial services, Healthcare, Manufacturing, Utilities
Managed detection and responseVulnerability managementIncident responseThreat hunting$$$Plano, TX
Visit website, Critical Start
Rank 02
Sagiss logo

Sagiss

Best for small business

An Irving managed IT and security provider for small and midsize North Texas businesses, in operation since 1997.

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Why they are on this list
  • States plainly that it serves small and midsize businesses across North Texas, which is the size band most Dallas security marketing skips past
  • Founded in 1997 and run from Irving since, which makes it one of the longest operating IT and security providers in the metroplex
  • Holds a SOC 2 Type 2 attestation and a Cyber Verify Level 3 rating, both covering its own operations rather than its customers'
  • Runs a round-the-clock operations center staffed by its own employees rather than an outsourced overnight desk, and says so on the service page
  • Lists managed detection and response, patching, email security and identity hardening as separate line items, so a buyer can see what is and is not in the contract
Founded
1997
Attestations
SOC 2 Type II
Sectors
Professional services, Financial services, Healthcare, Construction, Nonprofits
Endpoint protection and managed detection and responsePatch and vulnerability managementEmail security and anti-phishingIdentity and access hardening$Irving, TX
Visit website, Sagiss214-276-5976
Rank 03
Armor logo

Armor

Best for managed detection

A Plano firm selling managed detection and response alongside a compliant cloud platform for regulated industries.

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Why they are on this list
  • Sells round-the-clock managed detection and response under that name, and has done since before the acronym was common shorthand
  • Named a Leader in the Frost and Sullivan Global MDR Report in 2025
  • Started in 2009 as FireHost and rebranded to Armor in 2015, so the detection practice grew out of running regulated hosting rather than out of reselling a tool
  • Won a Global InfoSec Award for Innovation in Compliance from Cyber Defense Magazine in 2021
  • Built around HIPAA and PCI DSS workloads, which suits the North Texas healthcare and payments companies that need the monitoring and the audit evidence from one supplier
Founded
2009
Sectors
Health technology, Financial technology, Technology
Managed detection and responseCompliance and audit supportArmor Enterprise CloudMulticloud security$$$Plano, TX
Visit website, Armor877-262-3473
Rank 04
Weaver logo

Weaver

Best for compliance

A national accounting and advisory firm with Qualified Security Assessors on staff and offices in Fort Worth and Dallas.

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Why they are on this list
  • Has PCI Qualified Security Assessors on staff, so the firm advising on a payment card gap can perform the assessment rather than hand it to someone else
  • Names Certified ISO 27001 Lead Auditor, CISA, CRISC, CCSP and Certified Ethical Hacker among the credentials its IT advisory team holds
  • Runs SOC 1, SOC 2 and SOC 3 examinations as a named practice with its own page, alongside the PCI DSS and ISO work
  • Keeps a staffed two-floor office at 2821 West 7th Street in Fort Worth and a second North Texas office in Dallas, both listed with the firm's other locations
  • Ranked 28th in the INSIDE Public Accounting Top 100 Firms and 25th in The Business Journals list of the largest US accounting firms
Attestations
PCI QSA
SOC examinationsPCI DSS assessmentISO servicesCybersecurity advisory$$$Houston, TX
Visit website, Weaver817-332-7905
Rank 05

ITECS

A Dallas managed IT provider that has run cybersecurity as a named practice since 2002.

Checked
  • Founded in Dallas in February 2002 and still headquartered in the city rather than covering it from a branch office
  • Lists managed endpoint detection and response, managed firewall, email security, vulnerability assessment and penetration testing as separate services, each with its own scope
  • States that it manages more than seven thousand endpoints and holds client retention at ninety five percent
  • Supports HIPAA, CMMC and PCI DSS work as named compliance tracks, which matters for North Texas healthcare providers and defense supply chain firms
  • Its Promus Cloud hosting platform carries a SOC 2 Type II attestation, so the infrastructure side has been audited by someone outside the company
Founded
2002
Sectors
Healthcare, Legal, Manufacturing, Financial services, Oil and gas
Managed endpoint detection and responseManaged firewall servicesEmail security and Microsoft 365 identity protectionPenetration testing$$Dallas, TX
Visit website, ITECS214-444-7884
Rank 06

Axxys Technologies

A Plano managed services provider that has sold IT and security across Dallas-Fort Worth since 1996.

Checked
  • Trading as Axxys since 1996 after starting as Ribbons Inc in 1987, which makes it one of the oldest continuously operating IT providers in the metroplex
  • Named to the Dallas 100 list of the area's fastest growing small businesses in 1996
  • Aligns its security program to the NIST Cybersecurity Framework and names that framework rather than describing a house method with no reference point
  • Lists managed security services, vulnerability management and incident response planning as their own services rather than folding them into a support contract
  • Names municipalities and oil and gas among its sectors, both of which carry procurement rules a generalist provider tends not to know
Founded
1996
Sectors
Construction, Healthcare, Financial services, Municipalities, Oil and gas
Secure managed IT servicesManaged security servicesCo-managed IT servicesVulnerability management$$Plano, TX
Visit website, Axxys Technologies214-297-2100
Also on the shortlist
Rank 07

OakTruss Group

A Dallas advisory firm, legally Cyber Defense Labs, working on security testing, risk and AI governance.

Website, OakTruss Group
Rank 08

Aeko Technologies

A Fort Worth IT and security provider working with companies from ten staff to a few hundred.

Website, Aeko Technologies
Rank 09

Velocity IT

A Dallas managed services provider covering IT, cloud and security across the metroplex.

Website, Velocity IT
Rank 10

Cloudavize

A Dallas managed IT and cybersecurity provider working with small businesses across the metroplex.

Website, Cloudavize

Cyber Security Firms may earn a referral fee if you engage a firm through a link on this site. How that works.

How to Choose a Cyber Security Firm in Dallas

Start with what triggered the search. In North Texas it is usually one of three things. An insurer or a customer sent a questionnaire and the renewal date is close. A supplier or a sister company got hit and the board wants to know whether the same thing could happen here. Or it already happened, and the first days of what to do after a data breach are containment, preservation and notice, with a 60 day clock running on telling affected Texans.

The metroplex spans about ninety miles, and that shapes the shortlist more than buyers expect. A provider with one office in Plano is not going to have someone at a Fort Worth plant within the hour. Ask where the engineers sit and what an on-site visit costs, because several firms quote metro-wide coverage from a single building.

Then check three things a website will not volunteer. First, whether an attestation the firm displays covers its own operations or only describes work it does for clients. Second, who investigates an alert overnight, and what they may do before calling you. Third, whether the firm will name a starting range for the work you described before a discovery call. The threats that actually cause breaches at a Dallas company are phishing and stolen credentials, so weight those answers toward the firms that watch email and identity closely.

What the Ranks Mean

Rank one is the best firm overall on the checks in the editorial policy. Ranks two to four are the best firm for one kind of buyer each: a small business, an organization buying managed detection, and an organization facing compliance work. The rest of the shortlist cleared the same checks and is ordered on them. A low rank on this list is not a warning; a firm that failed a check is not on it.

Questions about hiring a cyber security firm

What do cyber security firms in Dallas charge?

None of the firms here publish a rate card. Managed IT with security included is priced per user per month across the metroplex and reaches into the tens of thousands of dollars a year for a company of fifty. Managed detection bought on its own is priced per endpoint or per log source. Compliance work is quoted per framework. Ask for a starting range against your headcount first.

Do I need a firm in Dallas-Fort Worth, or will a remote one do?

For monitoring, no. Several firms here watch North Texas networks from operations centers elsewhere and that works fine. For incident response, an assessment that involves walking a plant or a clinic, and anything touching municipal or defense procurement, a team that can be on site the same day is worth the premium. The metroplex is also wide, so ask where the engineers actually sit.

What does Texas law require after a data breach?

Under the Texas Identity Theft Enforcement and Protection Act, a business must notify affected individuals no later than 60 days after it determines that a breach occurred. Where the breach affects 250 or more Texans, it must also be reported to the Office of the Attorney General as soon as practicable and no later than 30 days after that determination, using the state's electronic reporting form.

Does the Texas Data Privacy and Security Act apply to my business?

The act took effect on July 1, 2024 and reaches businesses that operate in Texas or sell to Texans and that process personal data. Small businesses as defined by the federal Small Business Administration are largely exempt, although a small business still needs consent before selling a consumer's sensitive data. State agencies, nonprofits, higher education, HIPAA entities and Gramm-Leach-Bliley institutions sit outside it.

Which industries drive cyber security demand in Dallas-Fort Worth?

Corporate headquarters work sets the top of the market. Airlines, telecoms, banking and insurance run large teams here and buy specialist help rather than a whole program. Below that sits a deep mid-market in manufacturing, construction, oil and gas, healthcare and logistics. Defense suppliers add CMMC to the list, and anyone taking card payments adds PCI DSS.

What should I ask a Dallas firm before hiring it?

Ask where the people watching your network sit, and what they are allowed to do at three in the morning without calling you. Ask whether an attestation on the website covers the firm's own operations or only describes what it helps clients achieve. Ask for the register entry behind any assessor credential. Then ask for a starting range before a discovery call.

How is this list put together?

Every firm is checked on what it actually does, the attestations that can be verified, its track record, a response test where we contact it as a prospective client, and how clear it is about scope and price. Rank one is the best firm overall. Ranks two to four are the best for small business, managed detection and compliance. The editorial policy sets out each check and what fails it.

Ranked lists in other cities

Each metro is researched on its own. A firm that leads nationally does not automatically appear on a city list, and most city leaders are not national names.

The national ranking