We updated this article in April 2022 to add more information about each featured product, based on extensive research done by our team.
What if easing your anxiety and giving your mental health a boost could be as simple as taking a deep breath? With aromatherapy—an alternative form of holistic therapy—you may be able to do just that. And what better way to benefit from aromatherapy than filling your home with the best essential oil diffusers on the market?
“Smell is mediated by the olfactory nerve, which is wired directly into the limbic system—the brain’s emotional processing center,” Leland Stillman, M.D., from Tampa, says about the benefits of essential oils. “This system talks to the rest of the brain, particularly the brainstem, which controls our vital functions.” In other words, your sense of smell can have an impact on your body's response to stress.
Whether you relieve migraines with peppermint essential oils or reap the benefits of lavender essential oils to soothe your anxiety, PMS, and more—you’ll likely need an aromatherapy diffuser to spread scents around your home. Here’s an overview of the types of essential oil diffusers, and our picks for the best ones on the market right now.
How we chose the best diffusers
We scoured the internet for top-rated picks that have a variety of styles and specialties to meet everyone’s unique needs—and studied each products specs—to bring you the best of the best.
Our top essential oil diffusers
- Best overall: URPOWER Essential Oil Diffuser and Cool Mist Humidifier
- Best for large rooms: Asakuki Premium Essential Oil Diffuser
- Best ultrasonic: LEMON + Co. Cool Mist Ultrasonic Essential Oil Diffuser
- Best for small rooms: PureGuardian Ultrasonic Cool Mist Essential Oil Diffuser
- Best design: EQUISUPRO Ultrasonic Cool Mist Essential Oil Diffuser
- Best nebulizing: Organic Aromas Nebulizing Essential Oil Diffuser
- Best evaporative: Weftnom Waterless Portable Essential Oil Diffuser
- Best splurge: Vitruvi Stone Essential Oil Diffuser
Shop top picks of each diffuser type below.
Essential Oil Diffuser and Cool Mist Humidifier
✔️ BEST OVERALL
It’s easy to see why this device has amassed more than 75,000 excellent reviews on Amazon. For less than $20, you get an ultrasonic essential oil diffuser that doubles as a cool mist humidifier and night light with a six-hour programmable run time and automatic shut-off. Plus, you can customize your mist mode to either continuous or intermittent. Seven color-changing lamps allow you to choose the shade you find most soothing. You’ll score a great diffuser for great value, but be sure to keep your decor in mind if you're avoiding something that'll stand out too much.
An Amazon customer who suffers from chronic sinus pressure headaches says this essential oil diffuser and humidifier helped her breathe better: “Thanks to my regular use of this with a combo of peppermint, eucalyptus, and lemon essential oils, I haven’t needed to take the pseudoephedrine every four hours nor do as many saline rinses.”
Asakuki Premium Essential Oil Diffuser
✔️ BEST FOR LARGE ROOMS
At 500 milliliters, this easy-to-clean ultrasonic diffuser’s tank is larger than many other options on the market, which means fewer trips to the sink to refill it. Two mist modes, three timed intervals (continuous and intervals of 60, 120, or 180 minutes), and seven colored light options mean you have plenty of ways to tailor your aromatherapy experience every time you turn it on. Amazon customers like how easy it is to use and how much water it can hold, reducing the number of times you need to refill it. But some reviewers complained it may not last as long as others.
“Such a small amount of oil can fill your room with scents from relaxing to energizing,” says one Amazon reviewer. “This diffuser has a timer and an auto shut off, so you never need to worry about it running dry which could damage the unit.”
PureGuardian Ultrasonic Cool Mist Essential Oil Diffuser
✔️ BEST FOR SMALL ROOMS
This device is a humidifier and diffuser hybrid with a lot of personality. It holds 100 milliliters and is ideal for a yoga nook, bathroom, or office. Amazon reviewers say the light can be quite bright, which makes it a fun guide in the dark, but something to keep in mind if that’s bothersome. The water reservoir is also treated with Silver Clean Technology to keep it bacteria- and odor-free. If your daily moment of zen is important to you, this one is a great pick to keep in your favorite space and add aromatherapy to a meditation practice.
One Amazon customer says: “The design is sleek and compact. I like that it has an auto-off function, which is great for when I use it at night. It will automatically shut off when the water and oils run out.”
Ansin Essential Oil Diffuser
Built with four different timed settings—auto, one hour, three hours, or five hours—and seven LED lights, placing one of these essential oil diffusers in your living room, office, or bedroom will immediately make you breathe better. And thanks to its ultrasonic technology, it provides a quiet and continuous mist. If you only have a small space for a diffuser, this option may be a bit too large.
Amazon customers appreciate that its large size can hold more water than compact diffusers. One says: “It holds more water than other ones do and will literally last all day. It lets out a great deal of scent with the oils. I have purchased others, but I prefer this one due to the size.”
LEMON + Co. Cool Mist Ultrasonic Essential Oil Diffuser
✔️ BEST ULTRASONIC
With its wood-grain finish and sleek transparent top, this diffuser adds an earthy chicness to any room. But it offers more than just good looks. A water capacity of 150 milliliters and running time of up to 10 hours and still compact with a detachable cord so you can easily move it around the house, or even from home to office. This is especially important because this particular diffuser may not fill larger rooms. It’s both a diffuser and a humidifier, so it’ll require water and attention to the levels indicated inside the device.
Ultrasonic Cool Mist Essential Oil Diffuser
Like a work of art, this essential oil diffuser infuses a decorative touch to your living room or bedroom with a cozy vibe. We love that it comes in seven soothing LED lights, which you can program to stick to a fixed color or have them alternating. It's also extremely quiet and emits a continuous mist in your home while you work or sleep. Plus, it auto shuts off when the water content is low, but it has a smaller reservoir that may need to be refilled more often.
One Amazon customer says: “I love the changing colors and how you can keep it stable on one color. It diffuses the essential oils very well. I smell it throughout three rooms. Very happy with the lovely pattern as well.”
Organic Aromas Nebulizing Essential Oil Diffuser
✔️ BEST NEBULIZING
If you’re looking for your essential oil diffuser to give off as powerful a scent as possible and aren't concerned about the device doubling as a humidifier, then this nebulizer diffuser is a great option. It may be a little pricey for some and beware the scent may be a little too intense. This stylish device requires no water and no heat and pumps essential oils into the air for one- to two-minute intervals for up to two hours. Optional mood lighting and a whisper-quiet design ensure you'll feel relaxed in no time.
One Amazon customer says: “It is beautiful as well as very powerful. My entire house smells wonderful. I am thrilled with this purchase. If you love diffusing oils, this is the only way to go.”
Weftnom Waterless Portable Essential Oil Diffuser
If you don’t want to deal with constantly filling up your diffuser with water (yes, spills can occur), a great option is a fan-operated evaporative pick. While ultrasonic diffusers are easier to come by, evaporative diffusers like this one are super portable and rechargeable by USB. Add soothing lavender oils to pads and the fan will do the rest—without the need to plug it in. Go from room to room or even bring it along for a car ride, but you may want to consider if it’s worth taking the time to charge your diffuser.
One Amazon customer says, “It is very very quiet. You can barely hear it. It puts out a nice concentrated aroma but not too much. It doesn't overwhelm you. I really like everything about it and will likely order more.”
Vitruvi Stone Essential Oil Diffuser
✔️ BEST SPLURGE
This minimalist-inspired diffuser blends in as decor, and its heavy ceramic material makes it look and feel luxe. An optional LED light emanates a candle-like glow, it can run for up to eight hours and has an automatic shut-off function. Be aware this is one of the pricier options.
“It looks like a lovely little vase, not too modern, not too classic. It functions flawlessly and really puts out a nice amount of aroma,” one Amazon shopper writes. “I am so impressed, I bought a second one for my office.”
NOW Ultrasonic Real Bamboo Essential Oil Diffuser
If you’re looking for a simple diffuser to start your aromatherapy practice, this ultrasonic tool is great for everyday use. It comes with two settings for one hour and two hours, plus rotating LED lights that can be controlled to suit your mood. It’s bottom-heavy, so it’s safe to move around without having to worry about it tipping over. The real bamboo exterior gives the device a natural look, and it’s a great pampering gift that will make any home feel like a spa. If you're looking for more bells and whistles, this may not be the best pick for you.
“I have used this diffuser nearly daily for four months,” says one Amazon reviewer. “It is by far the quietest diffuser I've encountered. It's attractive, gives off essentially no light, and is super easy to operate and clean.”
SURBON Himalayan Salt Essential Oil Diffuser
This decorative essential oil diffuser will literally uplift the energy in any room. Through its advanced ultrasonic technology, it disperses essential oils in a fine mist that spreads quickly but isn't too overpowering. This makes it easier for people to take in the scent and reap its benefits. It also has seven soothing soft LED lights (and a remote control) that you can cycle through or set to one color. The bonus is that it automatically shuts down when the water in it runs out, but it may be a bit bright for some who want to use it at night.
One Amazon customer says: “It’s a quiet and nice-looking oil diffuser. It works quietly. It immediately gives a nice smell for the room. The illumination is very eye-catching and relaxing at the same time. Looks very stylish.”
Eessen Ceramic Essential Oil Diffuser
Boost the elegance of any room with this gorgeous flower-shaped diffuser. It has a capacity for 200 milliliters of water, seven LED light functions, and doubles as a humidifier. It is a bit small, so it may not fill larger spaces.
“The mist is really strong, better than my other diffusers and it filled my whole house with a wonderful aroma in only 10 minutes. It’s so beautiful too!” one Amazon shopper raves.
Stadler Form Jasmine Essential Oil Aromatherapy Dispenser
This powerful diffuser easily fills a space with your favorite fragrance and doubles as decor with a sleek look. The diffuser uses ultrasonic technology to blend water and essential oil to bring your favorite scent to life. It works for up to 21 hours straight, dispensing scents all day long, but it does require to be refilled often.
One Amazon reviewer wrote, “This little guy is perfect. He sits on my shelf and the very simple and understated design blends in perfectly with the rest of my decorations.” Snag it in four colors (but we’re big fans of the red!)
InnoGear Diffusers for Essential Oils
The natural appearance of the wood grain coated shell blends beautifully into any room. It not only functions as a diffuser but also as a vaporizer and humidifier. Some reviewers complained it needs to be cleaned often, but the diffuser is cool to the touch and safe to use around children.
One reviewer said, “The aesthetically pleasing wood grain, coupled with a low, sleep design gives you the ability to hide this away or show it off in any room.”
1500ml Aroma Essential Oil Diffuser
With a super large capacity and long running time, you’ll get almost a half gallon of water and up to 20 hours of fresh scents in your home. The diffuser is ultra-quiet and fills very large spaces with relaxing smells while also acting as a humidifier in your home. Be aware it is quite large, so it may not be the best for small spaces.
One reviewer said, “My husband and I are obsessed! We love this diffuser. We put peppermint and eucalyptus mint and it puts us to sleep really fast.”
Types of essential oil diffusers
These are best for those diffusing oils for internal support, such as issues with pain or using essential oils to soothe sunburns. These diffusers disperse molecules quickly without altering the chemical composition of the oil, therefore retaining the powerful benefits and potent aroma. They don’t require heat or water but use up more oil than other types of diffusers.
The most common type of aromatherapy diffuser, these devices require water to disperse a concentrated oil that’s controlled in aroma and potency. They work wonderfully to support dry air since they act as a humidifier and a diffuser—perfect for winter, or air-conditioned and windowless rooms because they purify the air you breathe while holding essential oils. These are ideal for those using oils that are diffused for emotional support, such as issues like insomnia, anxiety, and memory.
These use a filter or pad for essential oil distribution and a fan to circulate the essential oils. Evaporative diffusers aren’t the quietest of the bunch, but the fan allows the oil to evaporate more quickly and circulate the oils throughout the room.
How to choose
Run time. Look for diffusers that have the power to last for the length of time that’s ideal to you—whether for just a short while for a quick meditation, or all day long for a better-smelling home.
Sound and safety. Is the diffuser you’re choosing loud or quiet? Does it matter to you? Also, do you plan to be away at any time during the product’s run time? Consider an item with an auto shut-off safety feature if so.