The best replacement for rsyslog is nxlog.

The best alternatives to rsyslog are rated as following:
★★★★★  nxlog
★★★★★  logstash
★★★★★  syslog-ng
★★★★  lumberjack
★★★  fluentd
★★★  syslog
★  syslog linux
  sysklogd
  syslogng
  syslog ng

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

Other search terms related to rsyslog and their ratings are:
★★★★★ logstash
syslog-ng
You have in mind a companion for rsyslog and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of rsyslog in all years. Click on graph for more.
rsyslog
nxlog
logstash