Insights

Niche Expertise 3SL specializes in requirements management and systems engineering solutions with extensive experience across high-tech industries such as aerospace, defense, space, automotive, and nuclear, signaling potential for clients seeking tailored engineering tools.

Growing Market Presence With a revenue range of 1 million to 10 million and a focused customer base, 3SL presents opportunities to expand its footprint within mid-sized organizations that need specialized requirements management solutions.

Complementary Services Offering not only the Cradle tool but also related training and consultancy indicates potential for cross-selling services to clients aiming to optimize system engineering processes.

Technology Integration Their tech stack, including tools like Yoast SEO, Google Tag Manager, and security protocols, suggests a digital marketing focus and commitment to secure, scalable software solutions, appealing to clients valuing technology-driven systems.

Industry Focused Solutions Given their industry sectors, there's an opportunity to target organizations in regulated fields demanding compliance and robust system engineering processes, positioning 3SL as a strategic partner for complex project management.

3SL Tech Stack

3SL uses 8 technology products and services including Hotjar, Cart Functionality, Google Fonts API, and more. Explore 3SL's tech stack below.

  • Hotjar
    Analytics
  • Cart Functionality
    E-commerce
  • Google Fonts API
    Font Scripts
  • Yoast SEO
    Search Engines
  • HSTS
    Security
  • X-XSS-Protection
    Security
  • Google Tag Manager
    Tag Management
  • MediaElement.js
    Video Players

Media & News

3SL's Email Address Formats

3SL uses at least 1 format(s):
3SL Email FormatsExamplePercentage
First.Last@threesl.comJohn.Doe@threesl.com
47%
Last@threesl.comDoe@threesl.com
3%
First.Last@threesl.comJohn.Doe@threesl.com
47%
Last@threesl.comDoe@threesl.com
3%

Frequently Asked Questions

Where is 3SL's headquarters located?

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3SL's main headquarters is located at College House, Howard Street Barrow-in-Furness, Cumbria LA14 1NB, GB. The company has employees across 3 continents, including EuropeNorth AmericaAsia.

What is 3SL's phone number?

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

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3SL is a publicly traded company; the company's stock symbol is 3SLL.L.

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

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3SL's official website is threesl.com and has social profiles on LinkedIn.

What is 3SL's SIC code NAICS code?

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3SL's SIC code is 5734 - Computer and Computer Software Stores NAICS code is 5112 - Software Publishers.

How many employees does 3SL have currently?

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As of October 2025, 3SL has approximately 26 employees across 3 continents, including EuropeNorth AmericaAsia. Key team members include Financial Controller: J. L.Financial Controller: J. M.Office Manager: M. V.. Explore 3SL's employee directory with LeadIQ.

What industry does 3SL belong to?

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3SL operates in the Software Development industry.

What technology does 3SL use?

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3SL's tech stack includes HotjarCart FunctionalityGoogle Fonts APIYoast SEOHSTSX-XSS-ProtectionGoogle Tag ManagerMediaElement.js.

What is 3SL's email format?

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3SL's email format typically follows the pattern of First.Last@threesl.com. Find more 3SL email formats with LeadIQ.

When was 3SL founded?

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3SL was founded in 1987.
3SL

3SL

Software DevelopmentUnited Kingdom11-50 Employees

Developer of the requirements management and systems engineering tool "Cradle" and the provider of related training and consultancy services.

3SL has extensive experience in the integration of software tools and in the definition, deployment and management of requirements management and systems engineering services. We have specific experience in several industry sectors, including aerospace, defence, space, automotive and nuclear.

Section iconCompany Overview

Headquarters
College House, Howard Street Barrow-in-Furness, Cumbria LA14 1NB, GB
Phone number
SIC Code
5734 - Computer and Computer Software Stores
Stock Symbol
3SLL.L
NAICS Code
5112 - Software Publishers
Founded
1987
Employees
11-50

Section iconMedia & News

Section iconFunding & Financials

  • $1M$10M

    3SL's revenue is estimated to be in the range of $1M$10M

Section iconFunding & Financials

  • $1M$10M

    3SL's revenue is estimated to be in the range of $1M$10M

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