Users can find businesses by name or identification number (IČO), browse a catalogue by region, municipality, or industry, and view profiles bringing key information together in one place. Profiles may include company status, registered address, statutory bodies, ownership connections, VAT and insolvency indicators, and links to official records for verification.

The platform draws on government open data, including ARES, the public register, and Czech Statistical Office datasets. It organizes this information into readable summaries while directing users to sources such as justice.cz and the Collection of Deeds for legally authoritative checks. Data is updated daily, according to the site.

rejstr.cz also offers practical tools for business planning and administration. Users can check a proposed company name for similarity to registered names, generate AI-assisted name ideas and compare them with the register, search national trademarks, and create and download a PDF invoice without registering. Developers can access API, MCP, and OpenAPI documentation.