Backup Programs That Use Push Model Instead of Pull?

I'm looking for a short list of backup programs whose agents use a push
model rather than pull. We have been using ARCSERVE, and its agent
requires a central server to login to each remote machine with a particular
domain account that has administrator access on each machine. That creates
a big security exposure if that account gets compromised. I would prefer
a model where the agent runs as system on each computer, and then pushes the
backup upstream to a central server.