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Philips Sonicare DiamondClean Smart 9500 Review

This top-notch toothbrush is packed with smart features but comes at a hefty price
Philips Sonicare DiamondClean Smart 9500
Credit: Jenna Ammerman
Top Pick Award
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Price:   $270 List | $239.95 at Amazon
Pros:  Great cleaning power, stylish, solidly comfortable
Cons:  Exorbitantly expensive
Manufacturer:   Philips
By David Wise and Austin Palmer  ⋅  Oct 10, 2018
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66
OVERALL
SCORE


RANKED
#2 of 14
  • Comfort - 40% 6
  • Cleaning - 30% 8
  • Ease of Use - 20% 6
  • Battery Life - 10% 6

Our Verdict

Finishing in the upper portion of the group, the Sonicare DiamondClean Smart is undeniably a great toothbrush. It did very well in our cleaning tests and is both comfortable to brush with and convenient to use, with a solid battery life to boot. It's got a sleek and stylish appearance and includes a comprehensive set of smart features. Unfortunately, all of this performance comes at a price and the DiamondClean Smart is prohibitively expensive for most people.

Compare to Similar Products

 
Awards Top Pick Award Editors' Choice Award Editors' Choice Award Best Buy Award Best Buy Award 
Price $270 List
$239.95 at Amazon
$70 List
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$70 List$23 List$65 List
$44.97 at Amazon
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Pros Great cleaning power, stylish, solidly comfortableVery easy to use, solid battery life, great cleaning powerExceptional battery life, comfortableInexpensive, great battery lifeGood cleaning performance, easy to use
Cons Exorbitantly expensiveOnly a single cleaning modeNot the best at cleaningLimited features, not the best cleaning performanceNot the most comfortable, subpar battery life
Bottom Line This top-notch toothbrush is packed with smart features but comes at a hefty priceThis is an excellent all-around toothbrush that cleans well and is particularly easy to useA solid, all-around toothbrush with an outstanding battery life and excellent cleaning capabilitiesIf you are shopping on the tightest of budgets, then this is a great choiceThis great budget brush cleans well but can be a bit aggressive on sensitive gums
Rating Categories Sonicare DiamondCle... Sonicare Protective... Brio SmartClean Sonic Fairywill Sonic Too... Oral-B Pro 1000
Comfort (40%)
6.0
6.0
6.0
6.0
4.0
Cleaning (30%)
8.0
7.0
7.0
7.0
8.0
Ease Of Use (20%)
6.0
8.0
5.0
5.0
9.0
Battery Life (10%)
6.0
7.0
10.0
9.0
3.0
Specs Sonicare DiamondCle... Sonicare Protective... Brio SmartClean Sonic Fairywill Sonic Too... Oral-B Pro 1000
Charger info 100 - 240V
50/60Hz
0.5 - 1.3W
100 - 240V a.c.
50/60Hz
0.4 - 1.4W
100 - 240VA
50-60Hz
0.9 - 1.3W
N/A 110 - 130V 50/60Hz / 0.9W
Estimated annual brush head cost $50 $50 $24 $10 $40
Waterproof/resistant Can use in shower Can use in shower Yes, up to 1 meter up to 30 min Yes, up to 1 meter up to 30 min Can use in shower
# of different brush heads 11 + tongue brush 8 3 2 9
Measured battery life 24 days 28 days 70 days 50 days 11 days
# of brushing modes 9500 & 9700 Series - 3 intensities and 5 Modes: Clean, White+, Gum Health, Deep Clean+, and tongue care
9300 - does not have tongue clean
1 Clean 5 modes: Clean, White, Polish, Massage, Sensitive 5 modes: White, Clean, Sensitive, Polish, Massage 1 Daily Clean
Pressure sensor Yes Yes No No Yes
30 second reminder Yes Yes Yes Yes Yes
Two minute alert Yes Yes Yes Yes Yes
Travel case included Yes, charging case No No Yes No
Weight 5 oz 4.3 oz 4 oz 2.6 oz 4.5 oz
App Yes No No No No

Our Analysis and Test Results

The DiamondClean Smart slightly outperformed the Sonicare Series 2 and finished just behind the Brio SmartClean in our testing process. While the Brio is the most comfortable of this trio, the Sonicare DiamondClean Smart did do the best in our cleaning test. It is a little less convenient to use when compared to the Series 2 and can't match the Brio when it comes to battery life. Additionally, the DiamondClean Smart is by far the most expensive of these three brushes, costing about $200 more than either of them.

The DiamondClean Smart also uses an inductive charging cup.
The DiamondClean Smart also uses an inductive charging cup.
Credit: Jenna Ammerman

Performance Comparison


We have spent the past two years buying, testing, and comparing the performance of the best electric toothbrushes on the market in our quest to find the best. We divided up our testing procedure into four weighted rating metrics, with the DiamondClean Smart's results when it came to cleaning, ease of use, comfort, and battery life explained below.

The DiamondClean is one of the more comfortable brushes of the review.
The DiamondClean is one of the more comfortable brushes of the review.
Credit: Jenna Ammerman

Comfort


Comprising 40% of the total score, our set of comfort tests has the most bearing on the final score for each toothbrush. We had a panel of testers rate the brushing comfort of each product, as well as comparing the noise level and the ability to detect too much brushing pressure to finalize the scores. The DiamondClean Smart delivered a decent showing, meriting a 6 out of 10 for its results.

None of our panel of judges had any major issues with this toothbrush, with most of them rating it as one of the more comfortable models. We particularly liked how this toothbrush felt to hold, with its matte finish and size feeling very ergonomic in your hand. However, some of our testers with more petite mouths did find it slightly unpleasant when brushing their back molars and this brush is just powerful enough to be a little too much for those with the most sensitive gums. However, you can use the sensitive mode to mitigate this if you find that it bothers you.

This toothbrush is about average in terms of noise, being overall one of the quieter brushes in terms of amplitude. However, we did find this brush to have a high pitch whine that can be a bit irritating.

This toothbrush also won some extra points by having a pressure sensor that will slow the brush down if you are pressing too hard.

The companion app shows your brushing progress.
The companion app shows your brushing progress.
Credit: Jenna Ammerman

Cleaning


For our next metric, we ranked and scored how well each brush cleaned by performing a plaque removal test. This accounts for 30% of the final score for each toothbrush, with the DiamondClean Smart tying for the top spot of the entire group and earning an 8 out of 10.

For this test, we had our judges skip brushing their teeth in the morning and encouraged them to consume as many sugary foods as possible. They then used a plaque disclosing tablet in the afternoon, which stained all of the accumulated plaque over the 16 hour period or so since they last brushed a bright red. We then took before photos, had them use the DiamondClean Smart for a standard cleaning cycle, and took after-brushing photos, using those to determine scores.

This toothbrush did quite well in our cleaning challenge.
This toothbrush did quite well in our cleaning challenge.
Credit: Jenna Ammerman

The DiamondClean Smart removed virtually all of the stained plaque for most of our testers, with only one person missing a few of the harder to reach places on the inside surfaces of their teeth, putting it on par with the best brushes that we have seen to date.

This brush is very easy and convenient to use.
This brush is very easy and convenient to use.
Credit: Jenna Ammerman

Ease of Use


We graded and judged how easy to use the interface to run and switch cleaning modes on each brush is, how difficult it is to clean, if there is an easy option for storing additional brush heads, and if there is a two-minute timer to ensure you brush the correct amount. The DiamondClean Smart again did quite well, receiving a 6 out of 10 for its performance.

It is quite easy and intuitive to switch between modes using the additional mode select button. You simply press the button to cycle through the different cleaning options, of which there are 5, and the mode indicator you are in will light up accordingly.

The DiamondClean Smart has one of the sleekest interfaces of the...
The DiamondClean Smart has one of the sleekest interfaces of the group.
Credit: Jenna Ammerman

The charging cup does not have any storage for additional brush heads, but the USB charging case does have spots to store two brush heads.

The travel case can both charge the toothbrush and store two brush...
The travel case can both charge the toothbrush and store two brush heads.
Credit: Jenna Ammerman

This Sonicare toothbrush has an integrated timer with quadrant pacing to help you brush for the prescribed amount each day.

This DiamondClean Smart has a solid battery life, even with all of...
This DiamondClean Smart has a solid battery life, even with all of its smart features.
Credit: Jenna Ammerman

Battery Life


For the remaining 10% of the total score, we assessed the battery life of each electric toothbrush. To take both brushing and standby power draws into account, we ran each brush for a standard brushing cycle in the morning and evening, awarding points on how many days each one lasted. The DiamondClean Smart finished out with a solid showing, earning a 6 out of 10.


This toothbrush lasted for 24 days in our test — impressive, considering the standby power draw of the smart features.

Value


This brush is the absolute worst option if you are shopping on a budget. Period.

Conclusion


While the DiamondClean Smart is a very cool, top-notch electric toothbrush that scored well across the board, its extraordinarily high price tag makes it quite hard to recommend.

David Wise and Austin Palmer