The best replacement for soldering iron is soldering gun.

The best alternatives to soldering iron are rated as following:
★★★★★  soldering gun
★★★  torch
★★  hot air
★★  wood burning tool
★  desoldering iron

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Speaking about soldering iron, one probably shouldn't forget about solder.

Other search terms related to soldering iron and their ratings are:
★★★★★ solder
★★★ rosin core solder
You have in mind a companion for soldering iron and it is not yet here? Propose!



Google Trends

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soldering iron
soldering gun
torch