Security & Privacy

Secured with end‑to‑end encryption.
Protected by European privacy laws.

End-to-end encrypted

End-to-end encrypted

All communication through Wire is secured with end-to-end encryption — messages, conference calls, files.

Security white paper
Independently audited

Independently audited

Wire is the most extensively publicly audited collaboration and communication software on the market.

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Multi-device messaging

Multi-device messaging

One account works on up to 8 devices. Messages are encrypted for each device.

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Trusted conversations

Trusted conversations

Verify each conversation partner’s device fingerprints for maximum security.

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Forward and backward secrecy

Forward and backward secrecy

New encryption keys are used for each message, so a compromised key has minimal impact.

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100% open source

100% open source

Wire’s source code is available on GitHub for anyone to verify, modify and improve.

Code on GitHub
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30-day free trial for Pro account. Free for personal use.

Technical overview

Text messages and pictures use the Proteus protocol for end-to-end encryption. Proteus is based on the Axolotl ratchet and pre-keys that are optimized for mobile and multi-device messaging.

Voice and video calls use the WebRTC standard. More precisely, DTLS is used for key negotiation and authentication and SRTP is used for encrypted media transport. This means that voice and video calls are end-to-end encrypted for 1:1 calls and conference calls without compromising HD call quality.

Wire’s encryption works transparently in the background and doesn’t need to be activated — it’s always on. There’s no need to compromise security for usability or settle for missing features. Wire keeps everything private while avoiding the complexity that is common to other secure messengers.

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Swiss headquarters, EU servers

Fully compliant with the strict data protection laws in Switzerland and the European Union.

Detailed privacy white paper

We’re transparent about the data we collect, and what we use it for.

Simple Privacy Policy

We put privacy in simple terms that are easy for anyone to understand — not just for lawyers.

No phone number required

Register with an email address and share a unique username to connect with others. No address book access required either.

No profiling

Your privacy is our priority. Wire does not sell analytics or usage data to anyone.

No advertising

No ads, no banners, no popups, no takeovers – none of that.

Privacy by design

Wire's Privacy Policy is written to be easy to understand by anyone and we don't stop there – our privacy whitepaper has very detailed info not shared by any competitor.

We store only the data we need to make sure your conversations stay in sync across devices, to detect fraud and spam, and to troubleshoot customer issues.

Wire is fully GDPR compliant and helps its customers to deal with the requirements of GDPR. By encrypting all communication we ensure that no sensitive data is available to Wire as a 3rd party thus reducing the number of data processors a business needs to deal with.

Download privacy whitepaper


100% open source

Wire’s source code is available on GitHub with a GPLv3 licence. A self-hosted server option is available upon request.


Transparency report

Wire publishes a regular transparency report detailing all lawful requests for user data.


Robust business model

Wire does not sell its users’ data. We make money from paying customers and don’t rely on donations.


Independent security audits

Wire is committed to working with independent security experts to publish regular audits of different components of our app.

Web application, calling review
Kudelski Security and X41 D-Sec, March, 2018

Android client review
Kudelski Security and X41 D-Sec, March, 2018

iOS client review
Kudelski Security and X41 D-Sec, March, 2018

Protocol implementation review
Kudelski Security and X41 D-Sec, February, 2017

Reporting a Vulnerability

To report a vulnerability in Wire please contact us at the address below. We commit to fixing any security issue that we rate MODERATE or higher within 90 days.

Encryption: PGP Key

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30-day free trial for Pro account. Free for personal use.

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