Cookie and privacy statement.


Revised On: January 23, 2018


This privacy and cookie policy applies to the processing of your personal data as a user of the Siilo-app and the (mobile) website  

This privacy and cookie policy does not govern the terms and conditions with regard to the use of Siilo or the data sent by you through Siilo to other users. The terms and conditions for the use of Siilo and the processing of messages is governed by our End User License Agreement (EULA).  

Siilo takes data privacy and security very serious. We take all usual technical measures to prevent unauthorized access to your data on our servers. For all clarity with regard to messages sent over Siilo; because all data sent by users is encrypt and only readable by the device of each receiver, no other party including Siilo, can decrypt any of this data. Finally, we will never sell or provide your personal data to third parties without your consent, other then required by law.

Who controls the processing of your personal data? 

Siilo Holding B.V., of Keizersgracht 585, 1017 DR Amsterdam, the Netherlands, or a designated group company is the controller responsible for the processing of your personal data.  

Need to contact us?  

You can contact Siilo Holding B.V.:  
with the contact form on 
by e-mail to
by mail to Siilo Holding B.V., Privacy Department, Keizersgracht 585, 1017 DR Amsterdam, The Netherlands 

Providing your personal data is not compulsory  

Providing personal data is never compulsory. You can always decide whether or not to provide personal data. However, in order to be able to make use of a number of our services the provision of personal data is necessary. If we ask for the input of personal data, we will indicate which data are necessary to make use of the service and therefore must be provided, and which data can be provided optionally.  

Which personal data do we process?  

When we provide our products and services we may process your personal data. This could include the following personal data: 

  • your name, date of birth and sex  
  • your work address(es), phone number(s) and email address(es) 
  • your profession and other information you provide in your profile
  • pictures (including your profile picture) and videos, uploaded by you  
  • data of people with whom you want to share information while using Siilo 
  • data about your interests and preferences as a user of our (mobile) website, app, products and services 
  • financial data relating to orders and payments to us and to you 
  • data regarding your visit to our (mobile) website and app, including URL, IP-address, browser type, language, date, time and duration of your visit  
  • data on the status and identity of your mobile device 
  • your address book data on your phone 

Address Book Data 

Only with your explicit permission, we will collect the phone numbers of your contact lists and/or address book (“Address Book Data”). So no other contact information, such as the names that correspond with the phone numbers or email addresses, will be collected or used. The collection of the phone numbers allows us to match users of Siilo and place them in appropriate user groups. As such, we may indicate who of your connections are also users of Siilo, and likewise we may indicate to your connections the same regarding you. This feature allows you to connect with other users of Siilo and allows other users of Siilo to communicate directly with each other. In order to do this, and to make sure we give users the most up-to-date information, we will periodically check for updates to your contact lists and/or address book data. Address Book Data (if the user has given permission) is only transmitted to the server in hashed form and additionally protected using TLS 1.2. Only Address Book Data that has been matched will be stored (in hashed form). Address Book Data of non-users will not be stored. No Address Book Data will be given to third parties or used for advertising purposes.  

Message Data 

The following is for your additional information regarding message data. By default, when users send messages over Siilo, we may temporarily store the messages and other related data (“Message Data”) in order to ensure delivery to all receivers. After delivery, the Message Data will be deleted from our servers and only be available on the device of sender and receivers. Users can opt-in for using additional Siilo services (e.g. Siilo Web Messenger) that require for their correct workings that the Message Data of the user is also stored on our servers.

Your Message Data will by default be unavailable after 30 days, or longer if you or your organisation have chosen an alternate period. Your Message Data will be permanently deleted from our servers after a necessary limited reasonable retention period, required for system back-up reasons. After its deletion your Message Data cannot be retrieved. Message Data held by other users is governed by the same policy.

Messages are end-2-end encrypted. Siilo has no way to decrypt messages of users because it does not have knowledge of their private keys. Private keys of users are never stored on our server. The encrypted messages and media (images, videos etc.) are not retained any longer than necessary for correct functioning of Siilo. To prevent eavesdropping by third parties (e.g. in open wireless LANs), header information of messages (sender, recipient etc.) is protected by TLS 1.2 (with cypher supporting perfect forward secrecy) for transmission to the server, and from the server to the recipient. 

Although messages are securely sent and received through the Service, it is in all cases and always the user’s responsibility to determine if the receiver(s) is/are authorized to receive any possibly privacy sensitive information, like for example medical information that is reducible to a specific patient. Users are therefore responsible and liable for information they send to other users. Siilo cannot be held responsible or liable for any privacy sensitive information sent through the Service by users without the required authorization.

For what purposes do we process your personal data? 

Your personal data may be processed for the following purposes: 

  • to provide you with access to our (mobile) website and app, whether or not based on your registration as a user 
  • for showing who of your connections from your address book or contact list also use Siilo 
  • for the entering into and implementation of an agreement concluded with you  
  • to provide you with, and adapt to your preferences regarding, the agreed services, products and/or information  
  • to send you a newsletter, user information or a service message  
  • to enable you to view and share with others your data in the app or on the website  
  • to enable interaction with other users, and to invite others to make use of Siilo 
  • to enable you to provide and exchange information on the website or in the app  
  • to improve the quality, safety and usability of our (mobile) website and app and to combat fraud  
  • to comply with the rules and regulations imposed on us and for dealing with disputes 

To the extent that the processing listed above requires your permission, we will request such permission in advance. You can always revoke such permission.  

Your personal data will not be used for purposes other than those listed above.  

Data processing in the Netherlands and abroad  

Your personal data will only be stored and processed in the Netherlands or in countries where this is allowed under Dutch law.  

Third Party Websites 

Apart from websites of third parties which we engage as a processor, this privacy- and cookie policy does not apply to websites or third-party apps to which we provide a link or otherwise refer to on our website or in our app. This also applies to links to and sharing on social media such as Twitter and Facebook. We are not responsible for the data or privacy practices of these third parties, and refer to the privacy statements of these third parties. 



In as far as we engage the services of a third party for the purposes mentioned in this privacy- and cookie policy, and this third party in performing these services has access to your personal data, we have taken the necessary contractual and organizational measures to ensure that your data will only be processed for the purposes described here. 


Cookies are small text files that are stored on your computer, your phone or your tablet. They cannot damage those devices. We do not use cookies for the app. Below we briefly explain what cookies we use and do not use for our website, and what their purpose is.  

Functional cookies allow functions such as login on the website to work properly. Analytical cookies collect statistics of the users of the website, to enable us to constantly improve your user experience. Social media cookies enable the functionalities of social media such as Facebook, YouTube, Twitter, Google Maps, etc. Siilo does not make use of social media cookies. Advertising cookies keep track of how many and which ads you have seen on a website so that you may be presented with relevant advertising. Siilo does not make use of advertising cookies. 

You can always decide whether or not to accept or decline the cookies we may use, e.g. functional and analytical cookies. On your first visit to our website you will have the opportunity to accept or decline cookies.  

If you want to block cookies, adjust your browser settings. You can also delete cookies that are already installed. However, blocking cookies may result in the website not working properly. How to adjust your settings varies by browser. Please consult the help function of your browser. 


Security and retention 

We have taken appropriate technical and organizational measures to protect your personal data against loss or any form of unlawful processing. We will not retain or keep your data longer than allowed by law, required by law and/or necessary for the purposes for which the data are processed. The retention period therefore depends on the nature of the data and the purposes for which the data is processed. Retention periods may vary accordingly. 


Inspection, correction and deletion 

You have the right to know which personal data we keep regarding you, to inspect such data, and to request correction or deletion. You can send a message to this end with your name and contact information to Siilo Holding B.V., Privacy Department, Postbus 15788, 1001 NG Amsterdam, The Netherlands. In your request, please specify as much as possible which personal data you refer to. In general, we will respond within four weeks to a request for inspection or correction. In case of a deletion request we will delete the personal data as soon as possible, unless and to the extent that the law requires us to keep the personal data or if there are other compelling reasons to oppose removal. After the execution of a deletion request we will send you a message of confirmation. If the personal data is (partially) not deleted, we will send you a message in which we explain why your request could not (fully) be met. If we cannot identify which personal data are meant by a request for inspection, correction or deletion, we may ask you to specify your request in more detail. We suspend the execution of the request until you have provided us with such detailed specification. At the bottom of each e-mail you receive from us you will be given the opportunity to unsubscribe to such messages. 


Amendment and version 

We may amend this privacy and cookie policy. We recommend that you check regularly for changes. This privacy and cookie policy was last amended on January 23, 2018.