Insights

Scale-ready Revenue 4xxi reportedly handles large-scale impact with revenue in the high billions range and a track record of completing 100+ projects. This signals maturity and capability to engage in sizable, mission-critical engagements that USD-focused buyers seek in IT services.

Startup Ecosystem The company specializes in launching startups and runs startup competitions in London with partners like WeWork, Barclays, and VC networks. This presents opportunities to offer accelerator programs, co-building ventures, and cross-referral collaborations with fintechs, marketplaces, and early-stage ventures.

Full Stack Growth With services spanning Backend, Frontend, DevOps, AI/ML, and Mobile Development, 4xxi can position as a one-stop partner for end-to-end digital products, appealing to firms seeking integrated teams and streamlined vendor management.

Global Footprint Over 12 years in multiple regions (US, UK, Europe, Asia) and HQ in London indicate experience with diverse regulatory environments and distributed delivery. This can be leveraged to target multinational clients needing nearshore or offshore blend and robust governance.

Brand Presence Publications in TechCrunch, Forbes, Business Insider, NY Times, and Wired alongside recognition as a top web development firm establish credibility. This supports outreach to risk-averse buyers and procurement teams prioritizing market credibility and case study assets.

Similar companies to 4xxi

4xxi Tech Stack

4xxi uses 8 technology products and services including HubSpot Analytics, Amazon Web Services, Unpkg, and more. Explore 4xxi's tech stack below.

4xxi's Email Address Formats

4xxi uses at least 4 email formats:
4xxi Email FormatsExamplePercentage
FLast@4xxi.comJDoe@4xxi.com
71%
FL@4xxi.comJD@4xxi.com
17%
Last@4xxi.comDoe@4xxi.com
8%
LF@4xxi.comDJ@4xxi.com
4%

Frequently Asked Questions

What is 4xxi's official website and social media links?

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4xxi's official website is 4xxi.com and has social profiles on LinkedIn.

How much revenue does 4xxi generate?

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As of August 2026, 4xxi's annual revenue is estimated to be $1B - $10B.

What is 4xxi's NAICS code?

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4xxi's NAICS code is 5415 - Computer Systems Design and Related Services.

How many employees does 4xxi have currently?

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As of August 2026, 4xxi has approximately 21 employees across 3 continents, including Europe, Asia and North America. Key team members include Chief Executive Officer: E. T., Chief Product Officer: E. S. and Founder: E. S. Explore 4xxi's employee directory with LeadIQ.

What industry does 4xxi belong to?

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4xxi operates in the IT Services and IT Consulting industry.

What technology does 4xxi use?

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4xxi's tech stack includes HubSpot Analytics, Amazon Web Services, Unpkg, Google Workspace, Node.js, reCAPTCHA, Piwik and Facebook.

What is 4xxi's email format?

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4xxi's email format typically follows the pattern of FLast@4xxi.com. Find more 4xxi email formats with LeadIQ.

When was 4xxi founded?

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4xxi was founded in 2008.
4xxi logo

4xxi

IT Services and IT ConsultingEngland, United Kingdom11-50 Employees

4xxi is a London-based IT services and consulting firm that focuses on helping startups launch and develop products that transform industries. The company emphasizes creating products that genuinely make a difference, drawing on more than 15 years of experience across a range of notable projects. Its service offerings include backend development, frontend development, DevOps, AI/ML solutions, and mobile development.

Headquartered in London, the firm has operated in global markets for more than 12 years, including the United States, the Virgin Islands, Asia, and Eastern and Western Europe, and has completed over 100 projects. Its client base comprises startups and other ventures seeking engineering and product development support, and it runs startup competitions in London through partnerships with organizations such as WeWork, Barclays, F6S, 11FS, Capital Enterprise, and venture-capital firms.

Section iconCompany Overview

Website
4xxi.com
NAICS Code
5415 - Computer Systems Design and Related Services
Founded
2008
Employees
11-50

Section iconFunding & Financials

  • $1B - $10B

    4xxi's revenue is estimated to be in the range of $1B - $10B

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