ATM S.A.: Specializes in development of telecommunication networks, computer security, IT infrastructure management and provides broadband telecommunication services.
CERT Polska: The Computer Emergency Response team. Deals with security-related incidents within Polish computer networks.
Mroczek IT: A department of information technologies of Mroczek s.c. Provides Internet services and software development.
Softbank S.A.: Produces software for banking and financial services sectors.
Teleca (Poland) Sp. z o.o.: The Polish subsidiary of the Teleca group, supplier of software engineering services.
The Research and Academic Computer Network (NASK): Provides Internet connection, data communication and network security services to the Polish scientific and academic community. Administers the domains register in the .pl zone.
Young Digital Poland: Operating in the interactive software market since 1990, primarily as a creator of language learning software and other educational software packages.