S3 Company Ltd.


About S3 Company Ltd.

S3 Company offers a full range of data center services.

We have been providing physical and virtual servers to clients from all over the world, located in various data centers across Europe since 2010. In 2018, we took the next step along our path and we built our first own data center in Sofia (Bulgaria). It currently houses two colocation facilities with more than 5000 U in use.

Our continuous commitment to invest in research and development enables us to consistently implement innovations and improve the security and stability of our services.

At S3 Company, our clients can rely on the competence, adequacy and respect we would expect to receive if we were in their place.

Why colocate in S3C?

- Designed and built according to the TIER III standard

- Carrier-neutral data center

- 24/7 technical support and monitoring

- Own warehouse with spare parts for servers

- Preferential prices of server components

- Interconnection with other customers and operators

- Free installation of server and telecommunication equipment

- Free initial software installation and configuration

- Free 30-day non-binding test period for all services


- PCI DSS, ISO 9001 and ISO 27001 certified

- 24/7 qualified technical support

- Technical capacity for diagnostics and repair of server equipment

- Opportunity for connection to other data centers in Sofia

- Opportunity for colocation in our closet in other data centers in Sofia

- Distance to the nearest airport: 4.5 km

- Freight entrance and parking for customers

- More than 5000U running servers!

Colocation parameters

- Temperature: ~ 21.0˚C | Humidity: ~ 50.0%

- High quality 48U cabinets with 90% door perforation

- 50 cm double floor with a load of up to 1200 kg / m2

- Possibility for up to 4 x 25A fuse on the cabinet

- Individual online electricity meters for metering of electricity consumption

- Providing Zero-U PDU power strips and cable arrangers

- Colocation room available for Desktop and Mining equipment

- Possibility for private cells and colocation halls 


- Strategic location between the other data centers

- Three independent cable routes in the data center area

- Triple reserved cable approaches to the building

- Presence of all local telecom operators

- Ability to build wireless connections

- Own DWDM ring to other data centers

Electrical parameters

- Main power supplies from two independent substations

- Separate substations with 2 x 1000 kVA transformers

- Reserved diesel generator 1000 kVA (N + 1)

- Modular redundant UPS systems 230 / 400V

- Separate electrical panels for different power supply groups (A + B)

- Smart monitoring of power supplies


- High-efficiency precision air conditioning (N + 1)

- Hot and cold areas - possibility of cooling up to 12 kW per cabinet

- Free cooling and indirect adiabatic cooling

- Warehouse with spare parts for HVAC systems

- Constant monitoring of temperature and humidity


- Video surveillance of the collocation halls and the data center

- NFC card access control system

- 24/7 physical security of the perimeter around the data center

- Fire alarm system with smoke and fire sensors

- 24-hour authorized access for customers

- Individual locks for each cabinet

- Service Level Agreement (SLA) - 99.99%

24/7 Technical Support

24/7/365 Technical support. *Instant response to a problem

Optical Transmission

Reliability, redundancy and full control of your communications
Contact S3 Company Ltd.
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Petya Simeonova
Marketing Manager
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S3 Company Ltd. Data Centers (1 Location)

S3 Company Ltd.
S3C Data Center
Boulevard "Shipchenski Prohod" 63, Sofia, Bulgaria