Store, organise and retrieve your important data and documents
- All of your important data is kept safe and secure in your Personal Data Store.
- Instantly access any essential data or documents you need at the click of a button.
- Protect all your important data and documents from loss, theft or damage.
- Only Once provides full support for S42 International Addressing standards.
Some things should be done ‘Only Once’.
Entering our personal and business data is one of them.
Connect quickly and easily with online relations using QR code sharing.
- Invite trusted relations to your personal address book.
- Connect instantly using your own unique personal QR code.
- Search for contacts and expand your network easily.
- Target specific networks using appropriate, customized identities.

Access your relational data across platforms and devices.
Never worry again about where to find your relational data and documents.
Sync all your Only Once contacts to Outlook, Google or iPhone.
Sync your personal data to any third-party business application.
Our manifesto
The Only Once manifesto serves as a moral compass, and reflects the standards and values that our organization stands for.
We want to offer a personal platform where people and businesses are able to store their data once, but then share it as often, and for as long as they want. Our goal is to answer all kinds of repeated information requests immediately from the Only Once platform.
Bank-level security
The Only Once platform uses only the highest levels of security. All data is fully encrypted, and based on asymmetrical encryption that can be managed by you, and you alone. Not even Only Once can access your data. We use public/private keypairs (RSA) in combination with 256 bit AES encryption. We use An EV SSL certificate which offers the highest available levels of trust and authentication to the Only Once platform. Our data centre is ISO/IEC 27001:201, PCI DSS 3.1 and ISO/IEC 9001:2008 certified.
Our infrastructure runs in a fully redundant datacenter in Haarlem and Amsterdam.
No Patriot act interference
All our infrastructure is located within the borders of the European Union. Therefore all of the data hosted on our Life Management platform is fully protected by the EU Data Protection Directive, which regulates the processing of all personal data within EU borders. It is an important component of EU privacy and human rights law, and means that data stored in Only Once cannot fall under Patriot Act style surveillance by governments.
Your
benefits
of using
Only Once
- All your personal data, constantly at your fingertips
- Quickly connect with other users and keep in touch
- Automatically update all your contacts with just one click
- Stay in control of who has access to your data, and for how long
- Never enter your data into another form again
- Keep a firm grip on your virtual identity

Provincie Utrecht is one the funding partners of Only Once.