The best replacement for cics is ims.

The best alternatives to cics are rated as following:
★★★★★  ims
★★★★  risc
★★  mics
★★  cobol
  ims dc
  rics
  tpf

Your alternative for cics is not listed? Suggest!
Speaking about cics, one probably shouldn't forget about vsam files.

Other search terms related to cics and their ratings are:
★★★★★ vsam files
★★★★★ cobol
You have in mind a companion for cics and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of cics in all years. Click on graph for more.
cics
ims
risc