How it plugs in
—Public API
NoOpen source
YesFree tier
Signal on FTP Server Software6.3#11 of 33
vsftpd is a GPL-licensed FTP server for UNIX systems, including Linux.

Pricing
- vsftpdGPL-licensed FTP server for UNIX systems, including LinuxFree
As security.appspot.com lists them, checked 11 Oct 2026.