The 4 best essential oil diffusers of 2025 to safely scent your space

When you buy through our links, Business Insider may earn an affiliate commission. Learn more If you love filling your home with a signature scent, try using one of the best essential oil diffusers to spread consistent and natural fragrance as an alternative to the best candles. These diffusers safely and naturally spread fragrance without an open flame.A diffuser disperses fragrance and essential oils them into the air. There are two main types of diffusers: ultrasonic and nebulizing. Ultrasonic diffusers use evaporating water to carry essential oils into the air and are typically pretty affordable. Nebulizing diffusers create an internal vacuum that lifts fragrance into the air, so there are no humidifying effects. The main difference between the two is that ultrasonic diffusers distribute a more diluted fragrance that lasts longer, and nebulizing diffusers deliver highly concentrated fragrance.To determine the best essential oil diffusers, we tested nine option, taking into account...