Does a 3rd level Ranger with the Two-Weapon Fighting style and Hunter (Horde Breaker) archetype get 3 or 4 attacks?

Two-weapon fighting (PHB pg.195):

When you take the Attack action and attack with a light melee weapon that you’re holding in one hand, you can use a bonus action to attack with a different light melee weapon that you’re holding in the other hand. You don’t add your ability modifier to the damage o f the bonus attack, unless that modifier is negative.

Hunter (Horde Breaker) archtype (PHB pg.93)

Once on each of your turns when you make a weapon attack, you can make another attack with the same weapon against a different creature that is within 5 feet of the original target and within range of your weapon.

Is the Horde Breaker attack an attack action or more like a bonus action?

Does a 3rd-level Ranger with the Two-Weapon Fighting fighting style and Hunter (Horde Breaker) archetype get 3 or 4 attacks in a turn?

The two-weapon fighting rule (PHB pg. 195) says:

When you take the Attack action and attack with a light melee weapon that you’re holding in one hand, you can use a bonus action to attack with a different light melee weapon that you’re holding in the other hand. You don’t add your ability modifier to the damage o f the bonus attack, unless that modifier is negative.

The Hunter ranger's Horde Breaker option for the Hunter's Prey feature (PHB pg. 93) says:

Once on each of your turns when you make a weapon attack, you can make another attack with the same weapon against a different creature that is within 5 feet of the original target and within range of your weapon.

Is the Horde Breaker attack an Attack action, or more like a bonus action?