BD Top Chat is an instant messaging system focusing on privacy and multi-platform availability. BD Top Chat clients exist for mobile (Android). BD Top Chat users can exchange messages encrypted end-to-end,
self-destructing messages, along with photos, videos and files of any
type up to 1.5GB in size.
BD Top Chat is run by a German nonprofit organization backed by entrepreneur and philanthropist Pavel Durov. Its client code is open-source software, while its server-side code is currently proprietary. Software is also available from independent developers who make use of the BD Top Chat API.
The application features two types of chats. Ordinary chats use client-server encryption and can be accessed from multiple devices. Secret Chats use end-to-end encryption and can only be accessed from the two participating devices.
User accounts are deleted automatically after 6 months of inactivity, and this can be changed to between 1 month and 1 year.
Users can control the 'last seen' timestamps, replacing them with fudged messages like "last seen within a week". They can block other users and silence chats.
One or two checkmarks are displayed to indicate that the message is sent to the cloud or read by the recipient, respectively. It is also possible to see the status of the recipient when responding to a message.
Their latest release saw the introduction of new features such as replies, mentions, link previews and session management.
BD Top Chat is run by a German nonprofit organization backed by entrepreneur and philanthropist Pavel Durov. Its client code is open-source software, while its server-side code is currently proprietary. Software is also available from independent developers who make use of the BD Top Chat API.
Features
BD Top Chat accounts are tied to the phone number of the user, with possession of the phone with that number verified with a code sent by SMS or phone call to that phone. Subsequent logins are notified to the initial device with the IP address and time of login. The phone number associated with an account can be changed without losing messages. While availing this migration, contacts of a user who have the previous phone number of the user, and are not blocked by the user, will receive the user's new number automatically.Users can set up an alias or username which can be used by any other user to contact them, without having to add them to their contacts.BD Top Chat .me is a webservice provided by BD Top Chat which allows directly opening a chat with a user by following a hyperlink (like BD Top Chat .me/username) on supported devices.The application features two types of chats. Ordinary chats use client-server encryption and can be accessed from multiple devices. Secret Chats use end-to-end encryption and can only be accessed from the two participating devices.
User accounts are deleted automatically after 6 months of inactivity, and this can be changed to between 1 month and 1 year.
Users can control the 'last seen' timestamps, replacing them with fudged messages like "last seen within a week". They can block other users and silence chats.
One or two checkmarks are displayed to indicate that the message is sent to the cloud or read by the recipient, respectively. It is also possible to see the status of the recipient when responding to a message.
Their latest release saw the introduction of new features such as replies, mentions, link previews and session management.
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