The best replacement for kraken is kayfun.

The best alternatives to kraken are rated as following:
★★★★★  kayfun
★★★★  leviathan
★★★★  cthulhu
★★★  sailor jerry
★★★  coinbase
★★★  steam turbine
★★★  rsst
★★★  otterbox
★★★  electra
★★  prometheus
★★  captain morgan
★★  kraken pro
★★  megalodon
★★  tiamat
★★  aqua
★  giant squid
★  kraken
★  jaws
★  bitstamp
★  otterbox defender
★  cryptsy
  btc-e
  siberia v2
  manta
  two headed giant
  g430
  jack sparrow
  cruzan blackstrap
  cupid
  black pearl

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

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



Google Trends

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kraken
kayfun
leviathan