Most of us assume we’re brushing well enough, right up until a dentist points to the spot we’ve missed for months. Philips is betting the fix belongs on the toothbrush itself, not in an app you check twice and then forget. On July 7, 2026, the company announced the Philips Sonicare Next-Generation DiamondClean 9900 Prestige, its first electric toothbrush with on-device AI and real-time guidance. The pitch is simple: the brush watches how you brush and shows you, mid-session, where you still need to go.
Price: TBD
Where to Buy: Philips, Select Retailers
What Philips Announced
The 9900 Prestige sits at the top of a new Next-Generation DiamondClean range that also includes the 8000, 8500, and 9000. Philips calls it the brand’s most advanced electric toothbrush to date, and it’s the flagship for a lineup the company refreshed earlier this year under a new “Feel the Care” direction.
The headline feature is guidance that lives in the handle. A light ring reacts in real time to your coverage, your pressure, and any scrubbing, so the feedback happens while you brush rather than after you’re done.
Philips describes this as making the invisible visible, a line from Francesco Grillo, its Global Business Unit Leader for Oral Healthcare. The company’s own research pegs the problem at 37% of people who finish a brushing session genuinely unsure they did a thorough job between checkups.
How the On-Device AI Guides You
At the center is a 12-segment Mouth Map on the toothbrush’s display. As you move around your mouth, Smart Coverage Feedback tracks your progress and flags the segments you skipped, so a quick touch-up replaces the usual guesswork. Philips says the system runs on its third-generation AI and machine learning model with spatially aware guidance, all processed on the device.
Pressure is handled by Philips SenseIQ sensors, which automatically ease the intensity if you bear down too hard. You also get 8 modes and 3 intensity levels, plus a swipe control to set how the light ring communicates its feedback.
The Numbers Philips Is Claiming
Philips claims the 9900 Prestige removes up to 20 times more plaque than a manual toothbrush, measured with an A3 brush head. The brand also claims 15 times healthier gums in Clean mode versus a manual brush over six weeks.
Both figures come straight from Philips, so treat them as manufacturer claims rather than independent test results. They line up with how Sonicare has marketed its premium brushes for years, and the gum figure at least names a six-week window.
The cleaning itself leans on Sonicare Fluid Action, which drives fluid into the gaps between teeth and along the gumline so the bristles reach plaque they’d otherwise miss. The brush runs on the newer Sonicare motor that first appeared in the 5000 to 7000 series a year ago, tuned for a quieter, gentler clean that still reaches the back corners.
Design and Sustainability
The 9900 Prestige is built to look the part on a bathroom counter, and Philips gave the repair and packaging story real attention this time. It comes in five colors, Silver White, Satin Mauve, Quartz Black, Storm Blue, and Midnight Green, and ships with a rechargeable travel case plus a luxury charging glass for the handle. Philips also redesigned the battery encapsulation for easier replacement and repair, switched to paper-based packaging, and makes the brush heads from 70% bio-based plastic.
Price and Availability
Philips hasn’t published a price for the Next-Generation 9900 Prestige, and the brush isn’t on sale yet, so anyone ready to buy today will have to wait.
One caveat worth knowing before you shop: Philips reused the DiamondClean 9900 Prestige name. An older, app-based 9900 Prestige from 2021 is still on sale for around $330, but that’s a different product with an AI app rather than on-device AI. The Next-Generation version covered here, the one with the on-handle Mouth Map, hasn’t been priced yet, so don’t mistake the older model’s price tag for this one.
The company says the Next-Generation DiamondClean range will reach select retailers across Europe and the U.S. this fall, then expand to more countries later in 2026 and into 2027. Until Philips or a retailer posts a number, the price stays unconfirmed.
Who Should Care, and Who Can Skip
If you’ve ever left a cleaning promising to do better on your lower front teeth, the real-time Mouth Map is aimed squarely at you. The same goes for anyone who bought a connected toothbrush and then ignored the app.
Skip it if you’re content with a mid-range Sonicare and don’t want to pay flagship money for on-handle coaching. The core drivetrain already appears in the cheaper 5000 to 7000 series. You’d mainly be paying for the guidance layer and the design.
It’s also not the pick if you want something today, since this is a fall release. And if repair-friendly design and paper packaging don’t sway you, the value case gets thinner.
What to Watch Next
Two things will decide whether the 9900 Prestige is worth the wait. The first is price, because on-handle AI only matters if it lands at a number people are willing to pay. The second is how well the Mouth Map tracks in the real world, away from a controlled demo.
Price: TBD
Where to Buy: Philips, Select Retailers
For now, the interesting shift is where the intelligence lives. Philips moved the coaching off your phone and onto the brush, and if that idea sticks, it changes what you expect a premium toothbrush to do.
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