General questions send to e-mail:

Reg. no: 07759941, Czech Republic

With questions about business, contracts or press releases, contact the chairwoman

Petra Hanušová Adolfová (, +420 608 018 485)

For technical issues or questions please use e-mail:

Bug Bounty Program

If you’ve discovered security or relevant in-scope issue in or, please follow up-to-date instructions on

If you discovered security issue on other connected domain (such as we reserve the right to exclude low-impact / best-practices-only bugs from bug bounty program.

We follow responsible disclosure principles, meaning, if you report vulnerabilities to us directly and everything goes well, you’re eligible for reward and being listed in hall of fame. All reports are assessed and handled individually, and so are offered the rewards.