The best replacement for gutter helmet is leaf guard.

The best alternatives to gutter helmet are rated as following:
★★★★★  leaf guard
★★★  gutter guard
★★  gutter topper
★★  leaf filter
★  leaf relief
  gutter glove
  gutter cap
  gutter shutter
  gutter guards
  gutter shell
  leafguard

Your alternative for gutter helmet is not listed? Suggest!
Speaking about gutter helmet, one probably shouldn't forget about icicles.

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



Google Trends

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gutter helmet
leaf guard
gutter guard