When comparing TextExpander vs Transmit 4, 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 TextExpander is ranked 55th. 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 Cross-platform
Pro Has an iOS app
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.
Cons
Con Latest version only available on a monthly subscription
Con Naggy
TextExpander nags about subscribing to their mailing list, and giving it more access to private information such as Contacts.
Con Expensive
Currently a TextExpander license costs $35.