The Best Electric Toothbrush Under $100: What to Look For in 2026
From the Big Mouth Toothbrush team. Big Mouth was founded by orthodontist Dr. Bobbi Peterson. This guide is general information, not dental advice; ask your dentist what is right for your mouth.
The short answer: the best electric toothbrush under $100 has soft bristles, a two-minute routine you'll stick with, a head that fits your mouth, and replacement heads you can afford. Budget picks like the Philips Sonicare 4100 and Oral-B Pro 1000 cost about $50 and include pressure sensors. The Big Mouth Sonic 2.0 ($99.99) adds a patented wide head that covers more surface, 5 modes and 2 brush heads in the box.
What should you look for in an electric toothbrush under $100?
- Soft bristles and gentle pressure, as the ADA recommends.
- A head that fits your mouth and reaches every surface. Ask your dentist if you're unsure which size suits you.
- Modes you'll actually use, such as Sensitive for a gentler brush.
- Battery life that suits your routine and travel.
- Replacement head cost. Heads should be replaced about every 3 months.
Sonic or oscillating under $100?
Both can clean well when used properly. Sonic brushes (Big Mouth, Sonicare) vibrate the bristles side to side at high speed. Oscillating brushes (Oral-B) rotate a small round head. It mostly comes down to which feel you prefer. Full guide: sonic vs oscillating toothbrush.
How long should the battery last?
The Big Mouth Sonic 2.0 gives about 9 hours of battery. Philips lists the Sonicare 4100 at up to 14 days of twice-daily brushing. For travel, pack your charger; the Sonic 2.0's USB adapter is sold separately.
What do replacement heads cost?
Sonic 2.0 refills are $35.99 for 2 heads with covers, and 2 heads come in the box. Replace every 3 months, or sooner if the bristles spread. For other brands, check current refill prices on their sites.
Is the Big Mouth Sonic 2.0 worth $99.99?
It is if you want a brush that feels different. Dr. Bobbi Peterson designed the patented wide head to cover more surface with each pass. It has 50,000 vibrations per minute, 5 modes (Clean, Polish, White, Massage, Sensitive) and about 9 hours of battery, and it comes in Black, Platinum and Royalty Edition. If you mainly want a pressure sensor at the lowest price, Sonicare's and Oral-B's entry models are good choices.
Quick comparison
| Big Mouth Sonic 2.0 | Philips Sonicare 4100 | Oral-B Pro 1000 | |
|---|---|---|---|
| Head | Patented wide head | Standard click-on head | Small round CrossAction head |
| Motion | Sonic, 50,000 vibrations/min | Sonic, 31,000 strokes/min | Oscillating-rotating with pulsation |
| Modes | 5 (Clean, Polish, White, Massage, Sensitive) | 1 mode, 2 intensities | Daily Clean, Whitening, Sensitive |
| Pressure sensor | No | Yes | Yes |
| Battery | About 9 hours | Up to 14 days (twice-daily brushing) | Not stated on Oral-B's product page |
| Heads included | 2 | 1 | 1 |
| Warranty | 3 months (6- and 12-month plans available) | 2-year limited | 2 years |
| Price | $99.99 (compare-at $139.99) | About $50 | About $50 |
Competitor specs and prices are from Philips' and Oral-B's own websites, checked October 26, 2026. Prices change often; check the brand's site for today's price.
Shop the Sonic 2.0
Seen on Shark Tank with Barbara Corcoran, and founded by an orthodontist. Get the Big Mouth Sonic 2.0, $99.99. Gifting? The Sonic Trio Kit ($149.99) adds a tongue scraper and floss picks. See all electric toothbrushes, or read wide head vs regular toothbrush and electric vs manual.
FAQ
What is the best electric toothbrush under $100?
The one you'll use twice a day for two minutes, with soft bristles and a head that fits your mouth. The Big Mouth Sonic 2.0 ($99.99) is a strong pick if you want a wide head and 5 modes. The Sonicare 4100 and Oral-B Pro 1000 (about $50) are good budget picks with pressure sensors.
How long does the Big Mouth Sonic 2.0 battery last?
About 9 hours of battery.
How many modes does the Sonic 2.0 have?
Five: Clean, Polish, White, Massage and Sensitive.
What comes in the Sonic 2.0 box?
The brush, 2 brush heads, a base, a cover and a charger. The USB adapter is not included.
Is an electric toothbrush better than manual?
The ADA says both can clean effectively. Some people find a powered brush easier to use. Ask your dentist what's best for you.
Plan beyond the sticker price: Compare the handle, replacement schedule and recurring refill spend in our electric vs. manual toothbrush cost guide.