Information for Law Enforcement Authorities

The following information is provided for law enforcement authorities seeking information about users of the ProtonMail Service.

About ProtonMail

The ProtonMail Service provides secure e-mail service messaging to users around the world. You can learn about ProtonMail by visiting our website. The ProtonMail Service is offered by Swiss-based Proton Technologies AG. All user information is processed and stored by Proton Technologies AG in Switzerland.

Using ProtonMail for activities that break Swiss law is against ProtonMail’s Terms and Conditions. Under Swiss law, we are required to cooperate with law enforcement agencies on criminal investigations, within the framework of Swiss laws and privacy regulations.

Information Available from ProtonMail

ProtonMail collects user information in accordance with our Terms and Conditions, Privacy Policy and any applicable separate agreement such as a GDPR Data Processing Agreement or a HIPAA Business Associate Agreement. E-mails are stored on ProtonMail servers in encrypted format. They are also transmitted in encrypted format between our servers and user devices. E-mails between ProtonMail users are also transmitted with end-to-end encryption. Because data is encrypted at all steps, Proton Technologies AG cannot decrypt user messages.

ProtonMail User Notification Policy

Swiss law requires a user to be notified if a third party makes a request for their private data and such data is to be used in a criminal proceeding. However, in certain situations, notification can be delayed. This includes the following cases

Requesting Assistance

Whether you are a Swiss or a foreign law enforcement agency, please make your request for assistance directly to We will generally respond to you within 1 business day, although our response time is usually much shorter than this during Swiss business hours. More critical cases will automatically be given higher priority by our team.

We recommend law enforcement agencies contact us directly because it allows for faster responses and reaction times compared to official Swiss government channels which can take weeks or months to process requests. Our legal team will be able to advise you on whether or not we will be able to assist you with your particular case, and assist with the preservation of evidence if we believe that your request will be validated by Swiss authorities.

Depending on the nature of your case and which country the request is originating from, Proton Technologies AG may redirect you to competent Swiss authorities in order to respect the relevant Mutual Legal Assistance Treaty (MLAT) or for a Swiss case to be opened.

Required Information

We will be unable to process overly broad or vague requests. All requests must identify requested data with particularity and include the following:

Any requests must be submitted by emailing

Guidelines may change

Proton Technologies AG reserves the right to update this information periodically. Please consult it before making any future requests.