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The best electric toothbrushes 2021: get the best possible clean

Included in this guide:

The best electric toothbrushes 2021
(Image credit: Damian Lugowski / Shutterstock)

We've tested and ranked the best electric toothbrushes available today, so you can be confident you're choosing the right brush to keep your teeth and gums clean and healthy.

Oral health is hugely important – not just for keeping your teeth and gums in good condition avoiding the need for fillings, root canals and extractions, but for your whole body. Gum disease (periodontitis) has been linked with diseases throughout the body, including heart failure, due to systemic inflammation that begins in the mouth and spreads through the blood.

You can get a good, thorough clean without an electric toothbrush, but electric brushes have been found to be more effective at removing sticky plaque and preventing gum disease, which makes them well worth considering.

Whichever toothbrush you choose, your brushing technique is also hugely important for making sure you remove plaque from all tooth surfaces. Many of the electric toothbrushes in this guide offer real-time guidance to help you brush more effectively, applying the right amount of pressure and not missing any areas.

Budget is an important consideration too, and electric toothbrushes vary hugely in price, with premium models costing several hundred dollars or pounds. It's worth bearing in mind that prices drop dramatically a few months after launch though, and electric toothbrushes are often steeply discounted (particularly during sales events like Amazon Prime Day and Black Friday) so there's a good chance of picking up a top-end brush for a bargain price.

The best electric toothbrushes

Oral-B iO Series 9

The Oral-B iO Series 9 takes our award for the best electric toothbrush of 2021 thanks to its effective cleaning and smart real-time feedback (Image credit: Future)

The best electric toothbrush, if your budget allows

Specifications
Modes: 7
Sensors: Pressure, direction
Alerts: Brush timer, brush head replacement
Heads: 1
Extras: Travel case, charger, brush head case
Reasons to buy
+Thorough cleaning+Quiet, smooth action+Real-time feedback+Detailed brushing reports
Reasons to avoid
-Brush and heads are expensive

The Oral-B iO Series 9 takes our award for the best electric toothbrush of 2021, thanks to its smooth action that effectively removes sticky plaque while gliding from one tooth to the next, and its valuable real-time feedback that encourages you to improve your brushing technique, whether you use the Oral-B Bluetooth app on your smartphone or not.

The brush is very quiet (much more so than a typical oscillating brush) and feels smooth as you work your way around your mouth. The in-built pressure sensor not only warns you if you're pressing too hard, but also if you're not applying enough pressure to get a good clean, helping you achieve an optimum result.

Once you finish brushing (the timer will alert you), the iO Series 9's bright color display will rate your brushing with an appropriate emoji. It's a quick way to get feedback on your technique, and surprisingly motivating, but for more in-depth guidance you can turn to the Oral-B app.

This will detect which section of your mouth you're currently brushing, with graphics that update in real time to show when you've thoroughly cleaned each surface. When you're done, you'll get a report on your performance, and you can earn badges and awards along the way.

The downside of the Oral-B iO Series 9 is that it's one of the most expensive electric toothbrushes around. It cost $300 / £500 at launch, though its price has dropped significantly in the months since its release and you can now pick it up far more cheaply. Additional brush heads are also pricey, and the iO Series 9 isn't compatible with heads from older models, so you won't be able to use your spares if you're upgrading from a different Oral-B brush.

If your budget can stand it, though, this is an extremely well designed electric toothbrush that will have a real impact on how you clean your teeth, and will help set you up with better habits that can have a long term effect on your oral health.

Philips Sonicare 9900 Prestige next to charging case

The Philips Sonicare 9900 Prestige has a sleek, minimalist design and relies on its smartphone app for customization (Image credit: Future)

The best electric toothbrush for regular travellers

Specifications
Modes: 5
Sensor: Pressure, direction
Alerts: Timer, pressure, scrubbing
Heads: 1
Extras: Travel case, charger, cable, brush head cap
Reasons to buy
+Highly customizable+Real-time brushing guidance+Extremely quiet
Reasons to avoid
-Expensive-Heavily reliant on mobile app

The Philips Sonicare 9900 Prestige is another very impressive electric toothbrush designed to improve your technique long-term by monitoring your brushing and giving real-time feedback. If you make too much of a scrubbing action, the app will display an alert advising you to reduce your movements, and the handle will buzz gently. Press too hard, and the handle will pause, then resume with a lower intensity in reaction to your technique.

The Sonicare app monitors the brush's position in your mouth, helping ensure you clean every surface thoroughly, with on-screen graphics and timers to ensure you don't miss a spot. The app is less kid-friendly than the Oral-B equivalent, and won't shower you with emojis and awards for a job well done, but it will give you personalized tips, track your brushing technique and allow you to monitor it over time.

It's a seriously stylish electric toothbrush too, with a sleek, minimalist design and chic carry case to keep it charged on the go. It's also the quietest electric toothbrush we've tested to date, emitting only a subtle hum.

The only downside is that there are no controls for adjusting modes or choosing an intensity setting on the brush itself. Instead, all the customization is done through the mobile app. That's not an issue once you've set it to your exact preferences though, and provided you don't like to switch modes on the fly, it's a superb brush.

Philips Sonicare 9000 DiamondClean electric toothbrush beside charging case

The Philips Sonicare DiamondClean 9000 is a versatile electric toothbrush that combines premium looks with practicality  (Image credit: Future)

A versatile, stylish electric toothbrush that nails the basics

Specifications
Modes: 4, with 3 intensity settings each
Sensor: Pressure
Alerts: Brush timer
Heads: 1
Extras: Charger, travel case, brush head cap
Reasons to buy
+Plenty of cleaning modes+Very simple to use+Well built and stylish
Reasons to avoid
-No real-time brushing guidance-No pressure warning light

The Philips Sonicare DiamondClean 9000 is an extremely versatile electric toothbrush, with four brushing modes and three intensity settings for each one. All the essential controls are right on the sleek brush handle, and our tests with disclosing tablets showed that it did an excellent job at removing plaque, even at a lower intensity.

Like the Sonicare 9900 Prestige above, it connects to the Sonicare mobile app on your phone via Bluetooth, but there are far fewer options available. The DiamondClean 9000 doesn't have directional sensors to track your brushing, so you won't get real-time guidance as you work your way around your mouth.

The app will offer you handy brushing tips though, will alert you if you're applying too much pressure, and will switch the brush off once you've been cleaning for two minutes. It can also track the condition of your brush head and order a replacement automatically from Amazon, if you want to be truly organized.

Not the smartest brush around, but a dependable all-rounder – particularly if you spot a good deal on the price.

Ordo Sonic+ electric toothbrush

The Ordo Sonic+ is a stylish, affordable alternative to entry-level Philips Sonicare toothbrushes, and works on the same principle (Image credit: Future)

The best affordable electric toothbrush

Specifications
Modes: 4
Sensor: None
Alerts: Timer
Heads: 1
Extras: Brush head cover
Reasons to buy
+Premium design+Super affordable+Gentle sonic cleaning
Reasons to avoid
-No shaver socket adapter-No pressure sensor

The Ordo Sonic+ works on the same principle as Philips Sonicare electric toothbrushes, sending rapid pulses of water between teeth to dislodge sticky plaque, but in our tests we found it delivered a more gentle clean – something helped further by its soft bristles, which help avoid damage to your gums.

This isn't a smart toothbrush – there's no Bluetooth connectivity or smartphone app – but it's very impressive for the price. Not only does it have a premium design that's just as smart as a top-end brush from the likes or Oral-B, it also holds its charge for weeks, cleans thoroughly and can be supplemented by great value subscription packs containing mouthwash concentrate, toothpaste, replacement heads, and dental floss.

These packs also include three packages of interdental brushes that, combined with the gentle brushing action and small head, make the Ordo Sonic+ a particularly good choice for anyone with braces. There's no need to worry about damaging wires or brackets.

Our only real complaint about the Ordo Sonic+ is that its charger has a USB connector, but no adapter for a standard shaver socket. There's no pressure sensor either, but aside from that, it's a superb option if you're looking for an entry-level electric toothbrush that doesn't skimp on features or performance.

Oral-B Genius X electric toothbrush with its charging case

The Oral-B Genius X is a smart toothbrush that works well both with its smartphone app, and without (Image credit: Future)

The best electric toothbrush to use with or without an app

Specifications
Modes: 6
Sensor: Pressure, direction
Alerts: Timer
Heads: 1
Extras: App support
Reasons to buy
+Works well with or without app+Very accurate position detection+Excellent charging case
Reasons to avoid
-Rather noisy-May be too vigorous

If you're not sure whether you'll make full use of a 'smart' electric toothbrush, but you're interested in the idea, the Oral-B Genius X could be the perfect choice for you. The Oral-B app tracks the brush's location in your mouth with impressive accuracy, helping ensure you clean each surface thoroughly before moving onto the next, and once you're done you'll receive a score for your efforts. It's a handy way to keep you motivated (or encourage kids to brush more thoroughly), but the Genius X also works extremely well without it.

Whether you're using the app or not, the pressure sensor will alert you if you begin pressing too hard, helping avoid gum damage, the brush vibrates when it's time to switch to the next part of your mouth, and powers off after two minutes by default. In our tests it gave a good, thorough clean on the everyday setting, though it's quite vigorous so we'd recommend trying out the sensitive mode first to see how you find it; you might not need to try the more intense settings.

The brush's well designed charging case is another highlight worth mentioning, and offers a choice of charging options to keep your brush powered up on the move.

The Oral-B Genius X doesn't have the advanced frictionless magnetic motor of the iO Series 9, which means it's a little noisier, but it's still an excellent electric toothbrush. 

Oclean X Pro Elite in travel case

The Oclean X Pro Elite isn't supplied with a travel case, but it's so affordably priced, it's hard to grumble (Image credit: Future)

A powerful, super quiet toothbrush, but its app needs work

Specifications
Modes: 4 on brush, 12 in app
Sensor: Direction
Alerts: Timer
Heads: 1
Extras: App support
Reasons to buy
+Extremely quiet+Thorough cleaning action+Responsive touchscreen
Reasons to avoid
-Confusing mobile app-No shaver socket plug

The Oclean X Pro Elite is the quietest electric toothbrush we've tested to date. In fact, when you close your mouth it's barely audible – but don't let that fool you. This is still a powerful sonic toothbrush that delivers thorough cleaning on a par with much more expensive brushes.

It's well designed, too. A bright touchscreen display built into the brush handle allows you to choose from various modes and intensity settings, with a timer that counts down as you brush. It works surprisingly well with wet hands, and is more intuitive than pushing a series of physical buttons.

The Oclean X Pro Elite might not come with a charging case (the simple carry case supplied with our review unit is sold separately), but at the extremely reasonable price of $99.99 / £75 / AU$141 for the handle and one head, it's hard to complain.

Unfortunately, the brush doesn't come with a charging cable or adapter for a regular shaver socket – only a USB connector – and the mobile app is excessively confusing. Whereas Philips and Oral-B have created apps that are as simple as possible, Oclean overwhelms the user with a barrage of options that should have been pared back.

The X Pro Elite is an excellent brush by itself (it really is astonishingly quiet) but in our opinion it's best when used without its 'smart' functionality.

Cat Ellis

Cat Ellis is the fitness and wellbeing editor at TechRadar. She's been a technology journalist for 11 years, and cut her teeth on magazines including PC Plus and PC Format before joining TechRadar. She's a trained run leader, and enjoys nothing more than lacing up her shoes and hitting the pavement. If you have a story about fitness trackers, treadmills, running shoes, e-bikes, or any other fitness tech, drop her a line at catherine.ellis@futurenet.com.