Briar

Aplicativo Descentralizado

A messaging app for activists, journalists and anyone who needs a safe and robust way to communicate. Unlike conventional messengers it has no central server: messages are synchronised directly between users' devices. If the internet is down, Briar can sync over Bluetooth, Wi-Fi or memory cards; if it is up, it syncs over the Tor network to hide who is talking to whom. Briar Mailbox lets users who are online at different times exchange messages. Alongside private messaging it offers public forums and blogs, each user's contact list is encrypted and stored on their own device, and all communication between devices is end-to-end encrypted. Briar is for Android, with a desktop version in development .

Comunidade
Links
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Detalhes

Licença Copyleft (GNU General Public License, per the licence text in the repository). https://code.briarproject.org/briar/briar (primary), mirrored at https://github.com/briar/briar
Status de Dev 🟢 Ativo
Proprietário The Briar Project, governed by a voluntary board; Michael Rogers started the project, with Eleanor Saitta, Torsten Grote and other contributors named on its About page
Órgão de Governança A voluntary board, with a published governance page and a code of conduct
País Not stated by the project.
Ano de Início 2011
Stack Java and Kotlin (Android) with the Bramble libraries in the repository, Tor for internet transport, Bluetooth and Wi-Fi transports, and a separate Briar Mailbox component
Financiamento Grants and donations: the project lists the Small Media Foundation, Open Internet Tools Project, Access Now, Open Technology Fund, Prototype Fund, Internews, NLnet Foundation, the Next Generation Internet programme, the ISC Project and eQualit.ie
Última Investigação 29 de out. de 2026

Domínios de Caso de Uso

Comunicação Evolução de Plataformas e Soberania

Capacidades

Criptografado de ponta a ponta Funciona offline / em malha Autoalojável

Aplicativo Descentralizado Atributos

Origens Communication that survives surveillance and censorship and does not need the internet: built for activists and journalists, using Tor for metadata protection and Bluetooth, Wi-Fi and memory cards when connectivity is down
Banco de Dados Local encrypted database on each device; no server-side storage
Linguagem de Consulta N/A
Formatos de Dados Bramble synchronisation protocol messages between peers; the technical details are on the project wiki
Edição Colaborativa em Tempo Real N/A
Edição de Texto Rico Not stated by the project.
Suporte Móvel Yes: Android, via F-Droid, Google Play and a direct APK
Suporte Web No web client was described in the cited sources
Aplicativos Nativos Android app; Briar Desktop is under development by contributors
Termos Free and open source (GPL); the project accepts donations
Fundos Not stated by the project.
Baseado Em Tor for anonymity; the Bramble transport and synchronisation protocols developed by the project; public-key cryptography for contacts
Categoria de Caso de Uso Private messaging, public forums and blogs for activists and journalists
Tipo de Interface de Usuário Android app; desktop client in development
Capacidades Offline Strong: syncs over Bluetooth, Wi-Fi or memory cards when the internet is unavailable
Recursos de Colaboração Private chats, private groups, forums and blogs
Portabilidade de Dados Not stated by the project.
Ecossistema de Integração A headless mode and a mailbox component exist in the repository; no third-party integration was described in the cited sources
Exportação de Dados da Web2 Not stated by the project.
Coerência Pró-social Not stated by the project.
Fluxos Econômicos None: no payment, token or marketplace feature.
Governança e Tomada de Decisão A voluntary board governs the project, with a code of conduct for contributors
Mídia / Publicação N/A
Gestão do Conhecimento N/A
Sensemaking N/A
Gestão de Projetos N/A
Modelo de Comunicação Peer-to-peer synchronisation of encrypted messages between devices, over Tor, Bluetooth or Wi-Fi, with an optional mailbox for users who are online at different times
Resiliência de Rede High: it works without internet via Bluetooth, Wi-Fi or memory cards and with Tor when the internet is censored or monitored
Mecanismo de Descoberta Contacts are added in person (QR code) or by link; no central directory
Participantes Máximos Not stated by the project.
Soberania de Dados High: data and the contact list stay on the user's device and are encrypted