Seemer Messaging Server
Instant messaging server. Backend in pure Go (license GPL 3.0), client-side binding in Flutter as well as gRPC client support for C++, C#, Go, Java, Node, PHP, Python, Ruby, Objective-C, etc. Persistent storage is any one of YugaByteDB.
Supported
- Multiple platforms:
- One-on-one and group messaging.
- Channels with an unlimited number of read-only subscribers.
- Server-generated presence notifications for people, group chats.
- User search/discovery.
- Inline images, file attachments.
- Message status notifications: message delivery to server; received and read notifications; typing notifications.
- Most recent message preview in contact list.
- Ability to block unwanted communication server-side.
- Anonymous users (important for use cases related to tech support over chat).
- Storage and out of band transfer of large objects like video files using local file system or Amazon S3.
- End to end encryption with OTR for one-on-one messaging and undecided method for group messaging.
- Replying and forwarding messages.
- Voice and video messages, location sharing.
- Previews of attached videos, documents, links.