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 Adobe Illustrator, Salesforce, Pardot, and more. Explore GreyCastle Security's tech stack below.

  • Adobe Illustrator
    Cad & Graphics
  • Salesforce
    Customer Relationship Management
  • Pardot
    Marketing
  • HubSpot
    Marketing Automation
  • Microsoft Windows
    Operating Systems
  • Microsoft Exchange
    Storage
  • Adobe Creative Suite
    Visualisation Software
  • CSS
    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

What is GreyCastle Security's phone number?

Minus sign iconPlus sign icon
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?

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

How much revenue does GreyCastle Security generate?

Minus sign iconPlus sign icon
As of July 2026, GreyCastle Security's annual revenue is estimated to be $1M - $10M.

What is GreyCastle Security's NAICS code?

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

How many employees does GreyCastle Security have currently?

Minus sign iconPlus sign icon
As of July 2026, GreyCastle Security has approximately 69 employees across 2 continents, including North AmericaAsia. Key team members include Chief Privacy Officer: D. R.Chief Financial Officer: H. C.Chief Operating Officer: T. H.. Explore GreyCastle Security's employee directory with LeadIQ.

What industry does GreyCastle Security belong to?

Minus sign iconPlus sign icon
GreyCastle Security operates in the Computer and Network Security industry.

What technology does GreyCastle Security use?

Minus sign iconPlus sign icon
GreyCastle Security's tech stack includes Adobe IllustratorSalesforcePardotHubSpotMicrosoft WindowsMicrosoft ExchangeAdobe Creative SuiteCSS.

What is GreyCastle Security's email format?

Minus sign iconPlus sign icon
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?

Minus sign iconPlus sign icon
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

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

Ready to create more pipeline?

Get a demo and discover why thousands of SDR and Sales teams trust
LeadIQ to help them build pipeline confidently.

ยฉ LeadIQ, Inc. All rights reserved.