When comparing Transmit 4 vs Quicksilver, the Slant community recommends Transmit 4 for most people. In the question“What are the best power user tools for macOS?” Transmit 4 is ranked 4th while Quicksilver is ranked 16th. The most important reason people chose Transmit 4 is:
Exchange data with FTP, SFTP or WebDAV servers or your Amazon S3 storage.
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Pros
Pro Fast and powerful file exchange client
Exchange data with FTP, SFTP or WebDAV servers or your Amazon S3 storage.
Pro Supports Amazon S3 & WebDAV
In addition to FTP, allows exchanging data with SFTP or WebDAV servers or your Amazon S3 storage.
Pro Enable a server connection as a normal disk in your Finder
So you can access your storage without the Transmit client.
Pro FTP Sync
Scans local and remote for difference and only transfer modified files. It's not rsync, but it's the next best thing
Pro Can enable a server connection as a normal disk in your Finder
So you can access your storage without the Transmit client.
Pro Easy-to-understand noun-verb paradigm for creating tasks
Pro A lot more powerful than Spotlight
Pro Makes it really fast to do a lot of actions
There are customizable triggers and capability to execute multilevel commands - e.g. launch terminal app, give the location of script and supply parameters for the script with one command.
Pro Vast extensibility via plugins
A lot of different plugins for browsers, file systems, mail clients, etc.