C9 Citizen Vault

Secure Digital Vault

C9 Citizen Vault is a secure and user-friendly digital vault that enables efficient communication between public authorities, citizens and businesses

Seamless Onboarding

Citizen Vault is quick and easy to get started with and we are ready to assist you throughout the onboarding and setup process.

Flexible registration

Users can either choose to give consent to businesses and public authorities one by one, or they can accept to register with all senders at once.

Smart Distribution

Citizen Vault allows you to send messages and documents with REST API or via your interface with no additional integration required.


The C9 Citizen Vault platform gives you the option to style and brand your messages to match your business or corporate visual identity and create your own organisational structures.

A hybrid cloud solution

Built on an AWS Hybrid Cloud Solution, the Citizen Vault platform helps your organisation integrate your on-premises and cloud operation.

Lower Costs

Exchange documents faster while keeping transaction costs down, saving up to 80% of distribution costs.


How it works

Security and Compliance

C9 Citizen Vault platform helps automate and streamline your digital communications with the highest level of security and compliance. We employ the latest technologies, principles and procedures to ensure that your digital post is protected.


The e-Boks platform helps automate and streamline your digital communication with the highest level of security and compliance.

Cumulo9’s partnership with the global secure digital platform provider e-Boks is a collaboration set to redefine the standards of digital interaction between businesses and their customers. A partnership that leverages the strengths of both organisations to offer a more secure, efficient, and integrated digital communication experience.