The best replacement for nis is ldap.

The best alternatives to nis are rated as following:
★★★★★  ldap
★★★  dns
★★  ils
★★  nis+
★  nnn
★  norton 360
★  nfs
★  nis
★  nav
  kerberos
  kis
  openldap
  sns

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

Other search terms related to nis and their ratings are:
★★★★★ nfs
★★★★ kerberos
You have in mind a companion for nis and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of nis in all years. Click on graph for more.
nis
ldap
dns