Transmit

macOS file transfer client, designed to support SFTP, WebDAV, and S3-compatible modes.

We’d like to acknowledge all the third-party libraries used in this project!

Screenshot

Goal

• Native-feeling dual-pane file browser
• Real local and remote file operations
• Transfer queue and activity tracking
• Saved servers, favorites, and inspector workflows
• A Swift-first architecture that can grow into a full desktop app

Product Principles

• Build the desktop interaction model first: selection, keyboard flow, drag and drop, split views, sidebars, inspector
• Keep protocol implementations behind a unified domain layer
• Prioritize one strong remote protocol before expanding sideways
• Use SwiftUI for composition, but allow AppKit bridging where macOS interaction fidelity requires it
• Ship vertical slices instead of broad unfinished feature surfaces

Proposed Architecture

The app should trend toward this layout:

Transmit/
  App/
  Models/
  Views/
  Services/
    LocalFileSystem/
    RemoteProtocols/
    Transfers/
    Persistence/
  Support/

Guidelines:

• Models: domain and presentation state
• Views: SwiftUI screens and reusable UI pieces
• Services: side effects, filesystem access, protocol adapters, persistence
• Support: shared utilities, formatters, constants

Technology Stack

• Swift
• SwiftUI
• AppKit bridging where desktop UX requires it
• Swift Testing