Insights

Strategic partnerships Recent integrations and partnerships such as Netwatch Group integration and Rapid Response Monitoring Services collaboration indicate an openness to ecosystem partnerships and joint solutions. This presents a sales opportunity to offer integrated security intelligence platforms and managed services that enhance incident response for law enforcement and private clients.

Direct data to dispatch The launch of DirectToDispatch (DTD) delivers crime data straight to police dispatch, signaling a demand for real-time, actionable intelligence workflows. Sales opportunities exist to expand DTD adoption across more agencies and to upsell complementary monitoring, analytics, or alerting capabilities.

Law enforcement focus Leadership and organizational emphasis in the Law Enforcement Division, including new senior leadership and board advisory roles, highlights a strong customer segment in public safety. This offers cross-sell potential for specialized solutions such as predictive analytics, case management, and secure data sharing for investigations.

Technology stack Utilization of platforms like Microsoft SQL Server, PostgreSQL, SharePoint, Jenkins, and Atlassian tools suggests readiness for scalable data integration and workflow automation. Opportunities exist to propose enterprise-grade security analytics, data governance, and integration services that streamline client IT ecosystems.

Growth signals Revenue range and active funding indicate a growing mid-market security company investing in productization and expansion. Sales teams can target security programs for mid-size agencies and private security organizations seeking enhanced intelligence, rapid response capabilities, and interoperable solutions.

Similar companies to 3Si

3Si Tech Stack

3Si uses 8 technology products and services including Microsoft SharePoint, WordPress, Jenkins, and more. Explore 3Si's tech stack below.

Media & News

3Si's Email Address Formats

3Si uses at least 4 email formats:
3Si Email FormatsExamplePercentage
First_Last@3sisecurity.comJohn_Doe@3sisecurity.com
83%
FLast@3sisecurity.comJDoe@3sisecurity.com
14%
First@3sisecurity.comJohn@3sisecurity.com
2%
FirstLast@3sisecurity.comJohnDoe@3sisecurity.com
1%

Frequently Asked Questions

What is 3Si's phone number?

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You can contact 3Si'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 3Si's stock symbol?

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3Si is a publicly traded company; the company's stock symbol is 3SIE.L.

What is 3Si's official website and social media links?

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3Si's official website is 3sisecurity.com and has social profiles on LinkedIn and Crunchbase.

How much revenue does 3Si generate?

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As of October 2026, 3Si's annual revenue is estimated to be $50M - $100M.

What is 3Si's SIC code and NAICS code?

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3Si's SIC code is 7381 - Detective, Guard, and Armored Car Services and NAICS code is 5616 - Investigation and Security Services.

How many employees does 3Si have currently?

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As of October 2026, 3Si has approximately 341 employees across 4 continents, including North America, Europe and Asia. Key team members include Chief Revenue Officer: M. C., Vice President Sales - Us Financial, Canada And International Markets: D. A. and Sr. Vice President, Human Resources: E. W. Explore 3Si's employee directory with LeadIQ.

What industry does 3Si belong to?

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3Si operates in the Security and Investigations industry.

What technology does 3Si use?

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3Si's tech stack includes Microsoft SharePoint, WordPress, Jenkins, Microsoft SQL Server, PostgreSQL, Microsoft Active Directory, Smartsheet and Atlassian Confluence.

What is 3Si's email format?

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3Si's email format typically follows the pattern of First_Last@3sisecurity.com. Find more 3Si email formats with LeadIQ.

How much funding has 3Si raised to date?

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As of October 2026, 3Si has raised $13M in funding. The last funding round occurred on Aug 29, 2002 for $13M.

When was 3Si founded?

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3Si was founded in 1971.
3Si logo

3Si

Security and InvestigationsPennsylvania, United States201-500 Employees

3Si is a security and investigations company based in Malvern, Pennsylvania, serving clients that include law enforcement, partners, and local communities. It operates an integrated platform designed to deliver timely, relevant data to the right people at the right time to support safer and more effective responses. A central element of the company's approach is the Power of 3, a framework that aims to turn data into actionable intelligence with real-world impact. The company's offerings target law enforcement and security partnerships, helping them improve incident response and community safety. In August 2025, 3Si launched DirectToDispatch, a capability that delivers critical crime data directly to police dispatch for safer responses. The approach combines practical field experience with advanced technologies to support safer communities.

Section iconCompany Overview

Phone number
SIC Code
7381 - Detective, Guard, and Armored Car Services
Stock Symbol
3SIE.L
NAICS Code
5616 - Investigation and Security Services
Founded
1971
Employees
201-500

Section iconFunding & Financials

  • $13M

    3Si has raised a total of $13M of funding over 1 rounds. Their latest funding round was raised on Aug 29, 2002 in the amount of $13M as a Venture Round.

  • $50M - $100M

    3Si's revenue is estimated to be in the range of $50M - $100M

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