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Contact

Questions about the software, e-invoicing or the price? Write to us. You reach the person who builds Zirko.

Write to us

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Up to 5,000 characters.

We use what you enter only to answer your enquiry. What that means in detail is set out in our privacy policy

Prefer plain e-mail?

That works too. This address leads to the same inbox as the form.

info@zirko.io

Every message is read

We do not promise a fixed reply time. Zirko is built by one person — at night, at weekends and on holiday it takes longer. You will see straight away that your message arrived.

Provider details

Company name, address and representation are set out in the legal notice.

To the legal notice

The answer may already be here

Zirko is not publicly available yet — the launch is planned for late 2026. We still answer questions about features, prices and switching today.

Some questions are answered faster here than by message:

  • What does Zirko cost?

    The pricing page states the amounts per office seat and shows what sets the packages apart.

  • From when must I issue e-invoices?

    The table lists the deadlines for every operating country: to public bodies, to businesses, and from when you must be able to receive. Where none is known, it says so.

  • Is this invoice file sound?

    Drop the file into the checker: it makes the file readable, recognizes the format and checks it against the rulebook. No account needed.

  • How does a particular area work?

    The help center explains every area step by step — readable without an account.

So the answer helps straight away

Just write what is on your mind. These details save us a follow-up question:

  • Which country your business sits in. Tax rates, e-invoicing dates and retention periods differ from country to country.
  • How many people work in your office and how many on site. The price follows from that.
  • If you would like to send something along — an invoice file, a screenshot — please write to our e-mail address instead: the form takes text only.

What happens to what you enter

The form collects name, e-mail address and message — nothing else. What you enter is not stored in a database but delivered as an e-mail to our inbox. There is no chat window on these pages, and no captcha from an outside provider either. We do not add you to a newsletter.