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CRM systems for
Business and institutions

We successfully create complex systems supporting business and institutions. Our solutions facilitate and accelerate processes in organizations, e.g. collection of medical data, logistics, customer and employee management, settlement of sales representatives.

Full service
promotional lottery

We have many years of experience in the implementation of promotional competitions and lotteries in Poland and other European Union countries. We constantly cooperate with marketing agencies, with whom we organize and support dozens of campaigns a year.

Sales and service of
tickets for events

We offer ready-made solutions for online sale of tickets/vouchers for individual events. We have tablets and a system for verifying tickets at the event site.

A few words about us

H4 was founded on February 29, 2016 in Warsaw.
Since then, we have prepared and implemented countless systems, web applications and dedicated specialist solutions.
Our clients are companies from many types of very diverse industries.

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Our experience

Throughout the years of operation, H4 has completed about 200 projects. We work in various models of cooperation, both as subcontractors for the Agency, offering programming services, as well as directly for the client, offering full service.

Check the range of services

Our systems work in projects for large corporations and public institutions. They also help in the development of foundations, associations and small family businesses. We provide services available to everyone, and our systems have been used in projects for, among others:

Contact form

I acknowledge that the administrator of personal data provided by me in the contact form is H4 Sp. z o. o. with its registered office in Warsaw (00-844, ul. Grzybowska 87). The basis for the processing of the data provided for the purpose of answering the submitted inquiry as part of the contact box available at is the legitimate interest of the administrator (Article 6(1)(f) of the GDPR). Providing personal data by me is voluntary, but necessary to obtain an answer to the question sent by me via the contact form. The administrator has appointed a data protection officer who can be contacted at the administrator's address and by e-mail at The data provided will be processed only in the time necessary to answer the submitted inquiry via the contact box and within a month from the date of the inquiry, in order to maintain the continuity of correspondence. I have the right to access the data provided and the right to request rectification, correction, deletion, restriction of their processing, the right to object to their processing, as well as the right to lodge a complaint to the supervisory body - the President of the Office for Personal Data Protection.