Insights

Acquisition opportunity GreyCastle Security was acquired by DeepSeas in December 2023, signaling potential integration opportunities for combined security offerings, channel partnerships, or cross-sell of enhanced managed security services to a larger merged customer base.

Managed SOC launch The company expanded into managed security with a Managed SOC offering in 2021, indicating a readiness to scale with MSSP-style services that can be upsold to mid-market clients seeking ongoing monitoring, incident response, and threat hunting.

Industry focus Specializing entirely in cybersecurity with a readiness-centric, standards-based approach positions GreyCastle for advisory and compliance-driven sales to organizations needing board-level risk communication, audit support, and policy alignment.

Regional footprint Headquartered in Troy, NY with a mid-size employee base suggests potential for regional enterprise penetration in Northeast markets, including MSP partnerships and government or education sector opportunities that require local expertise and proximity.

Recognition signals Past rapid growth and awards such as Inc. 5000 listings and Best Places to Work imply a reputable brand with proven recruiting and customer satisfaction stories to leverage in enterprise-level proposals and customer references.

GreyCastle Security Tech Stack

GreyCastle Security uses 8 technology products and services including CISSP, Elastic stack (ELK), HubSpot, and more. Explore GreyCastle Security's tech stack below.

  • CISSP
    Certificates
  • Elastic stack (ELK)
    Data Management
  • HubSpot
    Marketing Automation
  • HTTP/2
    Miscellaneous
  • Kali Linux
    Operating Systems
  • Microsoft Exchange
    Storage
  • Adobe Creative Suite
    Visualisation Software
  • HTML5
    Web Tools And Plugins

Media & News

GreyCastle Security's Email Address Formats

GreyCastle Security uses at least 1 format(s):
GreyCastle Security Email FormatsExamplePercentage
FLast@greycastlesecurity.comJDoe@greycastlesecurity.com
93%
LastFi@greycastlesecurity.comDoeJo@greycastlesecurity.com
3%
First.Last@greycastlesecurity.comJohn.Doe@greycastlesecurity.com
2%
F.Last@greycastlesecurity.comJ.Doe@greycastlesecurity.com
2%

Frequently Asked Questions

Where is GreyCastle Security's headquarters located?

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GreyCastle Security's main headquarters is located at 185 Jordan Road Suite 3 Troy, New York 12180 United States. The company has employees across 2 continents, including North AmericaAsia.

What is GreyCastle Security's phone number?

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You can contact GreyCastle Security's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is GreyCastle Security's official website and social media links?

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GreyCastle Security's official website is greycastlesecurity.com and has social profiles on LinkedIn.

What is GreyCastle Security's NAICS code?

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GreyCastle Security's NAICS code is 5415 - Computer Systems Design and Related Services.

How many employees does GreyCastle Security have currently?

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As of February 2026, GreyCastle Security has approximately 69 employees across 2 continents, including North AmericaAsia. Key team members include Chief Operating Officer: D. M.Chief Privacy Officer: D. R.Chief Financial Officer: H. C.. Explore GreyCastle Security's employee directory with LeadIQ.

What industry does GreyCastle Security belong to?

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GreyCastle Security operates in the Computer and Network Security industry.

What technology does GreyCastle Security use?

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GreyCastle Security's tech stack includes CISSPElastic stack (ELK)HubSpotHTTP/2Kali LinuxMicrosoft ExchangeAdobe Creative SuiteHTML5.

What is GreyCastle Security's email format?

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GreyCastle Security's email format typically follows the pattern of FLast@greycastlesecurity.com. Find more GreyCastle Security email formats with LeadIQ.

When was GreyCastle Security founded?

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GreyCastle Security was founded in 2011.
GreyCastle Security logo

GreyCastle Security

Computer and Network SecurityNew York, United States51-200 Employees

GreyCastle Security operates in the computer and network security sector, focusing on protecting clients from emerging cyber threats through solutions designed for continuous availability, alignment, quality, and satisfaction. The company emphasizes a cyber-focused approach, aiming to safeguard data, employees, and organizational reputation, and it strives to simplify cybersecurity planning so boards, auditors, and stakeholders can understand and communicate a roadmap.
Headquartered in Troy, New York, GreyCastle Security serves organizations seeking proactive, standards-based security practices. Its position in the industry centers on delivering consistent readiness and a proven process that exceeds common industry benchmarks, with services and programs that support ongoing cyber defense and compliance requirements.

Section iconCompany Overview

Headquarters
185 Jordan Road Suite 3 Troy, New York 12180 United States
Phone number
NAICS Code
5415 - Computer Systems Design and Related Services
Founded
2011
Employees
51-200

Section iconFunding & Financials

  • $1M$10M

    GreyCastle Security's revenue is estimated to be in the range of $1M$10M

Section iconFunding & Financials

  • $1M$10M

    GreyCastle Security's revenue is estimated to be in the range of $1M$10M

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