Best Essential Oil Diffusers


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Best Essential Oil Diffusers





LiteMist, Color-Changing
Check Price at: 1 store
A great all-around essential oil diffuser.
Emits a steady stream of fine aromatic mist and humidifies the air too. Runs quietly for up to 4 hours, covering 300-400 sq. ft. of space. Has LED light that provides 3 color options. Easy to set up and clean. Leaves no water residue.
Light is quite bright. Plastic used for the unit is not overly durable.


Ultrasonic, 7-Color
Check Price at: 1 store
Our runner-up is a powerful oil diffuser that can efficiently spread fragrance in a large room
Large water tank can hold up to 500 ml of water laced with essential oils. Can be used overnight (up to 10 hours). Effectively humidifies a 30-square-meter room. Equipped with useful extras such as a multicolor LED light that can be turned off, mist adjuster, and 5 intermittent timer settings.
Buttons are hard to press. Not for long-term use.


2-in-1 Ultrasonic
Check Price at: 1 store
Diffuses a stronger aroma due to the efficient breakdown of essential oils and increases a room’s moisture content too
Has high ultrasonic vibration frequency–up to 2.4 million ultrasonic vibrations per second. Shoots out a powerful mist. Automatically shuts off when the water is low. Modern design with intricate detail.
Small (100 ml) water tank capacity. Operates inconsistently. Hard to remove the lid.

Now Foods

Check Price at: 1 store
A good diffuser that due to its use of cool mist, provides a purer oil experience because oils are not chemically altered by the use of heat.
Blasts cool mist as soon as the power button is turned on. Can work for up to 5 hours. Has an auto shut-off function and rotating LED lights.
Some buyers report that the unit runs super quiet in the beginning then becomes really noisy after a while. It takes a while for the scent to reach all areas of a small room.


SpaVapor + Instant Wellness Essential Oil Diffuser
Check Price at: 1 store
A low-priced oil diffuser that you can take anywhere.
Compact size makes it portable. Diffuses oil via a non-irritating ultrafine mist. BPA-free oil diffuser with non-corrosive ceramic discs. Quickly spreads the scent throughout the space.
No timer setting and auto shut-off function. Doesn’t diffuse as much mist as the rest. Hard to clean. Some users raised leaking issues.


Customer Reviews

Like you, we believe in the importance of essential oils and how they’re efficiently dispersed by using the best oil diffuser. For this reason, our team went over dozens of oil diffusers with a fine-tooth comb to help our readers reach a smart decision faster.

To do this, we came up with a list of criteria that’s focused on active oil diffusers, their dispersing power, ability to cover a specific room size, price points, and additional features that helps users achieve beneficial results. We’ve combined an instructional guide that will help you get started in your oil diffuser journey, too. We’ve listed down the different types of oil diffusers, how best to clean them, and of course, how to efficiently use each.

Best Essential Oil Diffuser Reviews Guide 

The strong revival of essentials oils as of late has given birth to an overwhelming list of oil diffusers. Experts know the importance of essential oils and the manner in which they’re used. The National Institutes of Health (NIH), for one, believes that essential oils are truly valuable as long as they’re used as directed.

The NIH-recommended ways of using essential oils are as follows:

  • Indirect inhalation (oil diffuser)
  • Direct inhalation (inhaler)
  • Massage

For this guide, our team concentrated on active oil diffusers. These oil diffusers are created to automatically and intermittently disperse a controlled amount of essential oils through a fine mist or vapor. Here are some of the benefits of having one:

  • A safer choice given the lack of open flames that can lead to a fire emergency
  • It’s economical – a few drops of essential oil is enough to give you a stress-reducing environment for up to 8 hours
  • Its ease of use and convenience will help you focus on healing and relaxation

Types of Oil Diffusers

There may be hundreds of oil diffusers out there, but all of them are categorized into 2 types (active and passive), and each type has several subtypes. Check out the types of oil diffusers to know which one will work for you best.

Passive Oil Diffusers

Heat Essential Oil Diffusers: An example of this is the dish-and-candle combo. Diffusion of the essential oil is achieved through the application of heat. The caveat for this type of diffuser is the rapid dispersion of concentrated essential oil and the risk for injury like burns. Heat can also change the therapeutic properties of oil as well.

Reed Essential Oil Diffusers: This is the simplest method of essential oil diffusion. Reeds or sticks are vertically placed inside the bottle of essential oil. After a few minutes, the reeds will absorb the essential oil and diffuse it around the room.

Active Oil Diffusers

Evaporative Essential Oil Diffusers: This type of essential oil diffuser works like a heat oil diffuser except that it uses a fan rather than a candle. The fan blows directly onto a pad filled with essential oil. This causes the oil to quickly evaporate into a small area. Some favor this because the unit itself is typically cheaper than the rest. But the way it quickly disperses essential oils means that you’ll be spending more in the long run.

Ultrasonic Essential Oil Diffusers: Another term for a vaporizing oil diffuser. This type uses ultrasonic vibrations to break the bond that holds oil molecules together thereby creating a super fine mist. It requires water, unlike a nebulizing oil diffuser. Another significant feature of this unit is that the noise is reduced to a comfortable level. If you want an oil diffuser that can be used overnight without any sleep disruptions, this is the one for you. Best of all, this doubles as a humidifier.

Nebulizing/Atomizing Essential Oil Diffusers: Praised for its ability to disperse a powerful mist of concentrated essential oil across a large space via pressurized air.  Aside from using these in residential areas, nebulizing essential oil diffusers can effectively be used inside big commercial spaces such as yoga studios, spas, nail salons, and any store that values environmental stimulation. It requires no water and is built without plastic that can easily be degraded by certain types of oil like citrus, clove, and cinnamon. It can pump out intermittent blasts of aromatic vapors in varying degrees just like an ultrasonic oil diffuser.

How to Use an Essential Oil Diffuser

Knowing how to properly use your oil diffuser will help you take full advantage of its many benefits and features, as well as maximize the powerful stimulating effect of various essential oils. We decided to focus on the slightly complex types of oil diffusers and eliminated heat and reed given how easy they are to use.

Evaporative Essential Oil Diffusers:

  • Remove the pad (it’s usually located under the diffuser)
  • Add a few drops (5 to 8) of your preferred essential oil to the pad
  • Place the pad back into the diffuser
  • Plug the power cord into a wall socket then turn the power button on

Ultrasonic Essential Oil Diffusers:

  • Prepare the materials that you need (a small pitcher with water and the essential oil/s)
  • Remove the top cover
  • Slowly pour water into the water reservoir until it reaches the fill line. Protect the motor from an accidental splash by not filling the reservoir directly from the tap.
  • Add a few drops (5 to 8) of essential oil to the water
  • Snap the cover back on
  • Plug the cord into an outlet
  • Turn it on

Nebulizing/Atomizing Essential Oil Diffusers:

  • Remove the glass cover
  • Place 20-30 drops of essential oil into the reservoir
  • Put the glass cover back on
  • Connect the plug to the wall socket
  • Switch the unit on

Keep in mind that these are a set of general-rule-of-thumb instructions. One brand may have a slightly different set of instructions than the other, so make sure that you carefully read and follow the user manual of your chosen essential oil diffuser to avoid any problems.

How to Clean an Oil Diffuser

Improving the lifespan and overall efficiency of an oil diffuser is made possible through regular cleaning (after each use according to most manufacturers). There’s no one-size-fits-all when it comes to cleaning diffusers. Each type requires a specific technique. Here’s how to do it:

Evaporative Essential Oil Diffusers:

  • Take the pad out then wipe the container with a soft, dry cloth
  • Check if the fan inlet is blocked by any dried-up oil. If it is, wipe it with an alcohol swab. Squeeze the excess alcohol from the swab first before wiping the area clean.

Ultrasonic Essential Oil Diffusers:

  • Wipe the reservoir with dry cloth after every use to prevent any build-ups
  • Thoroughly clean your diffuser once a week by using the following method:
  1. Pour clean water into the reservoir, up to the specified water level.
  2. Add 1 to 2 tablespoons of white vinegar
  3. Let the unit run for 5 minutes
  4. Drain the reservoir
  5. Pour water over it again, swirl then drain
  6. Wipe the entire diffuser with dry cloth

Nebulizing/Atomizing Essential Oil Diffusers:

  • Carefully wipe the glass cover with dry paper towel.
  • Pour some isopropyl alcohol (99% is best for dissolving oils) onto a dry cloth until damp, then use it to wipe the glass cover
  • Pour isopropyl alcohol into the oil reservoir
  • Turn on your diffuser and let it run for 10 minutes
  • Drain the oil reservoir
  • Allow your oil diffuser to air dry

Frequently asked questions

Can you leave an oil diffuser on all night?

Yes. Some oil diffusers are built for overnight use. Ultrasonic oil diffusers, for one, can safely be used overnight and some brands can quietly run for up to 8 hours without the need for a refill.

What should I do when an active oil diffuser stops working?
  • First, check if the unit is properly plugged to an electric outlet.
  • Unplug the unit before checking if there’s enough water in the reservoir or if there’s too much. Both will cause diffusion problems. Add or remove water accordingly.
  • Remove the cover, and then drain the reservoir or remove the pad if you’re using an evaporative type.
  • Check if there’s any blockage to the vent or fan. Remove any obstruction that you see.
  • Pour water and add essential oils if you’re using an ultrasonic version, add essential oils to the pad of an evaporative diffuser, or pour essential oil to a nebulizing unit’s reservoir.
  • Plug the unit then turn it on.
  • If it’s still not working, the best thing to do is to contact the manufacturer.
Can you use essential oil diffusers around babies?

The concern is really about oil diffusers, but rather the kind of essential oils that should be used.

According to the National Association of Holistic Aromatherapy, “With regard to inhalation, from a safety standpoint, inhalation presents a very low level of risk to most people. Even in a relatively small closed room, and assuming 100% evaporation, the concentration of any essential oil (or component thereof) is unlikely to reach a dangerous level.”

But still, when it comes to babies and young children, NAHA recommends that the essential oil be diluted to 0.5% to 2.5%.

The American Academy of Pediatrics is neither for nor against it. It recognizes the rise in aromatherapy use. In fact, it’s part of the Complementary and Integrative Medical Therapies study. But the AAP concludes that further study is needed.

Extra precautionary measures should always be taken when it comes to this. The best thing to do is to ask your pediatrician before using one around your child.

Are essential oil diffusers safe for pets?

It’ll do more harm than good, experts say. In fact, ASPCA lists essential oils as one of the most common causes of toxicologic tremors in cats.

Animals’ sense of smell is more acute than ours, so they’re more prone to the unwanted side effects. This can immediately cause or worsen any breathing problems that your pet may be having.

There’s also the issue of safety. Your pet might accidentally knock the oil diffuser over then lick the pool of essential oil on the floor.

The team that worked on this review

Kealia Reynolds
Photo Editor
Rebekah Sedaca
Kelsey Roadruck
Sr. Editor
John Morgan

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