OSI is a company with years of extensive experience in:

  • information systems

  • electronic identities and electornic signatures

  • information security

  • systems integration

OSI Services

We provide services in areas of system integration, maintenance and IT solutions outsourcing and consulting in the field of security.

OSI Products

We have incorporated our extensive experience into our products, which enable companies to use electronic services more easily and securely.

OSI Solutions

We offer full implementation of our own solutions and those of our partners, tailored to the specific needs of each client.



The main activity of the company is the implementation and consulting in the field of information technology and the marketing of the solutions of our partners. The company’s activity is primarily focused on:

  • development and production of IT solutions

  • project implementation and outsourcing of services, where OSI acts as an external contractor

  • sale of IT solutions, services and equipment


OSI's product development is primarily focused on developing systems for identity management and securing personal and other business data, creating and maintaining public key infrastructure systems for managing digital certificates, providing consulting and support for the use and integration of digital certificates into the customer's environment, and developing specialized software solutions.
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In the area of system services, OSI focuses on providing services in the areas of data warehousing, application servers, data protection, and ensuring security and compliance in the handling and management of protected data.
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OSI's own activities therefore focus on services with high added value that combine the knowledge and experience of its employees with its own products, but also with products from leading global manufacturers, open-source solutions and products from local partners. With the many years of experience of its employees, a focus on projects with high added value and an extensive reference list of successfully completed projects, OSI is one of the leading IT companies on the Slovenian market.


OSI is certified according to ISO/IEC 27001, ISO/IEC 20000-1 and ISO 9001. For the execution of assignments for clients managing classified information, OSI has a security clearance to meet the conditions for the secure handling of classified information in accordance with the Classified Information Act, and its employees executing such assignments have a security clearance for access to classified information at the "Secret" level.

OSI is one of the leading IT companies on the Slovenian market with many years of experience of its employees, focus on high added value projects and an extensive reference list of successfully implemented projects.

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