Best secure messaging app you can download today

The best secure messaging app to keep your private conversations safe

In 2023, the digital landscape has been dominated by headlines concerning security and privacy. From the latest SEC requirements to major data breaches from some of the world's largest companies, the need for heightened security and privacy measures has never been more apparent. With these concerns in mind, it is imperative to select the best secure messaging app to protect your private conversations.

End-to-End Encryption: Protecting Your Conversations

A secure messaging app is only as strong as its encryption. One of the most critical features to look for in a secure messaging app is end-to-end encryption. This means that only the sender and recipient of a message can access its contents, ensuring that even if data is intercepted, it remains completely unreadable to anyone else.

Encrypted File Sharing: Protecting Your Files

Another crucial security component is encrypted file sharing. In secure messaging apps, any files shared within conversations should be completely secured using encryption and obfuscation techniques. This ensures that your sensitive data and files remain confidential.

Independent Security Audit: An Extra Layer of Trust

To add an extra layer of trust, you should choose a messaging app that has undergone an independent security audit. This means that independent security experts have rigorously tested the app's security measures, and the results have been made public for everyone to review. 

This transparency verifies that the app is as secure as its developers claim it to be.

Now, let's explore the top secure messaging apps that meet these criteria and provide the best protection for your private conversations.

1. Glacier

Glacier is a secure mobile platform designed for teams that provides end-to-end encrypted messaging, voice, video, file transfer as well as Android and iOS threat detection, encrypted DNS, VPN and obfuscated SMS and global external calling. It was created for organizations that required secure communications and a way to manage users and their devices.


  • Platforms: Android, iOS, Mac, Windows, and Web
  • Security Audit: Yes

Main Benefits

  • Tailored for teams with a feature rich admin dashboard
  • No phone number or email address required
  • Provides additional features outside of encrypted messaging such as device threat detection and external calling and SMS with burnable virtual numbers
  • Decade plus experience in communications within high threat environments


  • Not ideal for individual use

2. Signal

Signal is a free messaging solution that has gained notoriety thanks to endorsements from privacy advocate Edward Snowden. This app supports messaging, voice calls, and group chats all with end-to-end encryption to ensure your conversations are secure.


  • Platforms: Android, iOS, macOS, Windows, Linux (Debian)
  • Security Audit: Yes

Main Benefits

  • End-to-end encryption
  • Wide adoption for individual use
  • Open-source code, which allows the community to verify its security
  • Supports multiple platforms


  • Does not hide your phone number, potentially revealing your identity to contacts.

3. Wire

Wire positions itself as a secure collaboration platform, making it ideal for professional environments. It offers encrypted instant messaging, file sharing, and conference calls, all with end-to-end encryption to protect your conversations.


  • Platforms: Android, iOS
  • Security Audit: Yes

Main Benefits

  • End-to-end encryption
  • Open-source app, allowing for regular external security audits
  • Supports multi-factor authentication for added security


  • Logs some personal data, which might be a concern for privacy-conscious users
  • Limited to communicating with other Wire users, which could be a drawback for personal use

4. Wickr

Wickr is a secure communication and collaboration platform designed primarily for government agencies, enterprises, and the military. It allows users to exchange end-to-end encrypted and content-expiring messages, making it a top choice for those with strict security requirements. On June 25, 2021, Wickr was acquired by Amazon Web Services (AWS).


  • Platforms: Android, iOS, Mac, Windows, and Linux
  • Security Audit: Yes

Main Benefits

  • Tailored for high-security environments
  • Supports a wide range of platforms
  • End-to-end encryption for message security


  • Not consumer-friendly and may be too complex for everyday use
  • Not open source, limiting community scrutiny

How to choose a secure messaging app

In conclusion, when choosing a secure messaging app, it's crucial to consider your specific needs and the level of security you require and whether or not you need to manage your users and devices. Glacier, Signal, Wire and Wickr are all excellent options, each with its unique strengths and weaknesses. Ultimately, your choice should align with your privacy concerns and the nature of your business.

Photo by Samuel Angor on Unsplash

April 18, 2021
Team Glacier