The best replacement for scp is rsync.

The best alternatives to scp are rated as following:
★★★★★  rsync
★★★★★  sftp
★★★  rcp
★★★  cp
★★★  ftp
★★  sftp speed
★★  scu
★★  wget
★  ftp faster
★  ssh
★  rsync speed
★  creepypasta
★  slender
★  ftp speed
★  rsync faster
★  cp unix
★  slender man
★  sftp which is faster
  pscp
  ftps
  tftp
  ftp performance

Your alternative for scp is not listed? Suggest!
Speaking about scp, one probably shouldn't forget about password.

Other search terms related to scp and their ratings are:
★★★★★ password
★ symbolic links
★ sudo
★ overwrite
★ expect
shell script
You have in mind a companion for scp and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of scp in all years. Click on graph for more.
scp
rsync
sftp