Upstream FTP.

Upstream FTP

Upstream is a fast, native FTP and SFTP client built exclusively for macOS that delivers professional-grade file transfer capabilities without sacrificing modern design aesthetics. Combining the raw power of FileZilla with Apple's signature elegance, this Swift-based application offers developers, system administrators, and designers a seamless way to manage remote files through deep macOS integration and a clean, intuitive interface.

Product Highlights

• Native macOS Architecture: Built entirely in Swift using the SwiftNIO framework for rock-solid connections, blazing-fast transfers, and minimal system resource consumption
• Dual-Pane Interface: Classic two-panel layout enables effortless navigation between local disk and remote servers with drag-and-drop functionality from Finder
• Advanced Transfer Queue: Multi-threaded concurrent transfers with automatic resume of interrupted uploads/downloads and exponential backoff retry mechanisms
• Quick Look Integration: Preview remote files instantly using the spacebar, just like local macOS files, without downloading first
• Sandbox Security: Fully compliant with Apple's strict app sandbox security model, with all credentials stored securely in the system Keychain
• Modern Terminal UI: Real-time command logging with raw protocol commands and responses wrapped in a clean, contemporary interface

Use Cases

• Web Development & Deployment: Developers can edit remote files in their preferred editor (VS Code, TextMate, Xcode) with automatic upload on save, streamlining website maintenance and updates
• Server Administration: System administrators benefit from concurrent connections to multiple servers, SSH key authentication, and synchronized browsing across identical directory structures
• Design Asset Management: Designers can quickly preview remote assets with Quick Look, download folders as ZIP archives, and synchronize local and remote directories with visual conflict resolution
• Cross-Machine Workflow: Teams and individuals with multiple Macs stay synchronized through iCloud Site Sync, maintaining consistent server configurations across all devices

Target Audience

Upstream is designed for macOS professionals who demand enterprise-level FTP/SFTP functionality—developers, DevOps engineers, system administrators, and creative professionals—who refuse to compromise between powerful features and native, subscription-free software that respects Apple's design philosophy.