Introducing Klarseal: code signing certificates and Sign my app

OSLO, Norway, 2 November 2026. Archi Systems AS is launching Klarseal to help developers and companies sign their code. It gives European buyers a code signing supplier with a European supply chain behind the order.

Klarseal is a brand of Archi Systems AS for registered businesses. Klarseal sells code signing certificates, currently validated and issued by Certum.

A signature shows who published a file and that it has not changed since signing. That gives your customers a way to check the software you send them.

Standard (OV) is a great first certificate for a small developer. EV is the better certificate, with stronger identity checks. Both use cloud signing, with no USB token.

Every paid service behind your order is a European company. Your order data is stored in Europe. Your identity documents and signing key stay with a European certificate authority, not with us. Klarseal is run from Norway, which is in the EEA and outside the EU. Choosing Klarseal is a way to contribute to the European supply chain we support.

Sign my app is a free, MIT-licensed plugin. It signs your Windows app in the conversation with your AI coding agent after you approve, and never sees a password. A real signing run has been seen in the Claude desktop app, with approval in a separate Sign window. We have yet to see a signing run in the Claude Code terminal or Codex.

Ready to sign? Explore the certificates, see prices or contact us. A person answers by email.