Vendor agnostic service

Cloud Backup

Cloud backup for the enterprise datacentre is now a reality, offering industry-leading service levels and significant cost savings versus traditional, tape-based approaches. It scales more

Cloud Archiving

Keeping ageing data online is expensive, both in primary storage costs and unnecessary backups, as well as deriving little business value due to difficulty more

Utility Storage

Mapping applications and data to clearly defined storage service levels enables organisations to migrate from in-house homogenous storage infrastructures to an externally managed storage more

Backup Assessment

Poorly performing backup environments are surprisingly common, even in the enterprise world. Our fixed-price assessment provides a clear view of the problem areas, both more

Cloud readiness

  The Cloud Readiness assessment is the first stage of the 4sl Journey to Cloud service portfolio. It consists of an initial evaluation of more

Data Classification

To address the spiraling challenge of managing data growth, organisations are looking for technologies and practices to both reduce storage costs and introduce more more

Webcast - Enterprise Backup: 5 Challenges and Opportunities with AWS

How we think

4sl is a UK company, headquartered in London and our clients include several FTSE100, Fortune 500 and Global 500 companies.
Our vision is very simple: we don’t sell technology, we sell business outcomes and we focus relentlessly on them until they are delivered.

We cover all the enterprise technologies but remain impartial.
We live and breathe storage and backup, enabling us to focus on providing the highest possible levels of service.
We employ the largest group of accredited engineers and consultants of any independent UK firm.

In 2014 and 2013, we were listed in the Sunday Times Tech Track top 100 fastest-growing private IT companies.

ISO27001 (Information security management), ISO27018 (Private data in the cloud), and ISO9001 (Quality management) accredited.

Our team

Service Delivery

With years of experience managing some of the largest storage and backup environments in the world. You get direct access to people who understand delivering sustained high performance.
Technical Consultants

With accreditations in multiple technologies, our team includes some of the most knowledgeable consultants in the industry.
Cloud Architects

Our architects have the unique combination of deep technology expertise, technical direction and familiarity of delivering high quality cloud services to guide you on your journey to the cloud.
Project Management

We apply the same rigorous approach to all our work, whether consulting engagements or onboarding managed services, regardless if the implementations last a matter of days to 18-month programmes.

4sl facts & statistics

Servers under management
PB of Data under management
FTSE 100 customers
Sunday Times Tech track Top 100
Our vision is simple: we don’t sell technology, we sell business outcomes, and focus relentlessly on them until delivered.


We've been privileged to work with:

Want to say hello?

+44 (0) 203 307 1030

United Kingdom - Head Office - 4sl, 2 St Andrews Hill, London EC4V 5BY

India – 4sl Managed Services, 1st floor, ROMA building, Door no. 10, GST Road, Alandur, Chennai 600016

Get in Contact

15 + 13 =