If a class does not provide Booming Blade as a cantrip (as it holds for most "melee" classes), one can access Booming Blade through the Magic Initiate Feat, by being a High Elf or by dipping into Sorcerer, Warlock, Wizard or Arcana Cleric.

What classes get booming blade 5e?

What Classes get Booming Blade? Booming Blade is an evocation cantrip on the Wizard, Sorcerer, and Warlock spell lists. This makes the spell serviceable for the general caster. It does bonus damage on any melee attack.

Do Artificers get booming blade?

So booming blade and green flame blade are both on the artificer's cantrip list.