New in 5.1!

More localizations: Chinese, French, and German
New Server Type/Protocol Support: OpenStack Swift; “US GovCloud S3” servers
Advanced SFTP features: Support for SFTP ProxyCommand when using ssh config files; PKCS #11 cryptographic keys (such as Yubikey devices); Auth agent support (including Krypton); Added support for the ChaCha Poly1305 cipher

5.0

Activity queue: Monitor file transfer operation progress
File browser: Browse local and remote files simultaneously
Inspector: Easily get information about local and remote files
Places: Quickly access your most used folders and files
Servers: Save your favorite servers and cloud storage accounts for easy access

Sites and keys: Sync accounts and credentials between other Macs running Transmit 5
Other Panic Apps: Sync between Transmit and Coda on macOS and iOS

Folder Multithreading: Transfers folder contents asynchronously
Remote copy: Duplicate remote files without having to download them locally
Instant file transfers: No longer retrieve all file sizes before starting operations
UI Performance Optimization: Quickly access everything you need in a single window

More accurate progress reporting: File by file progress for sync operations
Support for multiple connections: Transfer more files faster than ever before
Local-to-local/Remote-to-remote support: Sync any two folders, not just for local to remote operations
Improved Rule management: Change and apply skip rules dynamically from UI
Manually include/skip files: Makes changes on the fly after simulating an operation

Key Management: Generate, Import, and Sync SSH keys all within Transmit
Open in Terminal: Quickly open local and SFTP folders directly in Terminal.app
Touch Bar Support: Access specific folders and transfer files right from the Touch Bar
S3: V4 API support and Multi-part uploading for files > 5GB

Built-in Editor Improvements
- Path bar
- Remote file path shown in editor window
- Path to file on server is now used as the temp file path
2FA/OTP support for SFTP based connections
Batch file rename
Copy and Paste files between browsers
Finder Tags
Path-based File Rules
Regex file filtering
NTLM & HTTP Digest authentication support
UTF-8 NFC (Normalization Form Composition) support
More font size options
Support for alternating row colors in list view
Download progress now shows in Dock/Finder
Sort in Icon & Column Views
Compress & Upload contextual menu (right-click, then option key down)
State restoration support