Glossia
Reference clients
Frothly publishes free, open-source Glossia clients for Android, iPhone, desktop computers and older phones. All of them are built from the same cryptographic core, and all of them speak Glossia 4.0.
Clients
-
Android
Glossia for Android
The most widely used Glossia client, built to run well on inexpensive phones and slow networks.
-
iOS
Glossia for iPhone
The reference client for iPhone, with the same features and protections as the Android client.
-
Windows, macOS and Linux
Glossia for desktop
A companion client for computers, linked to your phone. It keeps no keys the phone does not know about, and can be unlinked from the phone at any time.
-
Android, for older and low-memory phones
Glossia Lite
A smaller client for older phones and expensive data, used most in places where both are common.
-
Linux and macOS terminals
glossia-cli
A command-line client for researchers, implementers testing their own clients against the reference, and people who prefer a terminal.
This site describes Frothly’s clients but does not distribute them. Other clients built on the open specification exist; Frothly does not review them, and they are not covered by Glossia’s audits.
The rest is up to you
Glossia protects messages in transit and on relays. These three habits protect the rest.
-
Get it from the right place
Install Glossia only from your platform’s official store, where the publisher is listed as Frothly. Anyone can copy an app’s name and icon.
-
Verify your contacts
Compare safety numbers with the people who matter most, in person or over a call. It takes a minute, once.
-
Plan for your device
Set disappearing messages for sensitive conversations, and learn how to turn on travel mode before you need it.
No single tool is enough. For email, use an end-to-end encrypted provider such as Tuta. If your phone is likely to be taken from you, a hardened operating system such as GrapheneOS makes it far harder to get into. If Glossia is not the right fit for the people you need to reach, Signal is excellent and free. And the Electronic Frontier Foundation’s Surveillance Self-Defense guide is the best place we know to start planning. These are independent projects, and Frothly is not affiliated with any of them.