The New, Best and Fastest Way to Straighten Hair (2024)

Boasting a perfect performance score in the Lab along with being the fastest tool to heat up, this ghd brush styled hair quickly and effectively. The brush contains bristles specifically designed to help detangle and smooth and has anti-static technology, which the bran claims to help prevent frizz after styling. The one downside? There is only one temperature setting and no digital temperature display.

Testers say: "I loved pretty much everything," shares one tester with thick, curly hair. "It effectively tamed my thick hair and left it with body."

For those who are pressed for time, Amika's speedy straightening brush gets the job done quickly. In GH Beauty Lab testing, 100% of users rated it the best for maintaining body and achieving the perfect hairstyle. We were also impressed that it had the greatest temperature range (170-450º F), ideal for all hair types and textures. One caveat: A few reviewers noted that it is hard to get close to the roots and hairline.

Testers say: "I really liked using this product because it styled my hair fast and smoothed out the slight curl some of my strands can have in the morning or after wearing a ponytail/claw clip," shares one user. Another notes that "it is lightweight and very easy to use!"

Maximizing surface area, T3's large brush features an extended styling surface that spans its edges to help you achieve sleek, smooth hair. It received perfect scores in our testing for making hair look smoother and less frizzy, for gliding through hair easily and for minimizing static. It also includes nylon bristles, ionic technology and three heat settings to get static-free results with less damage.

Testers say: "I have thick, frizzy hair," shares GH's beauty assistant. "Even with just one pass, this brush significantly smoothed, straightened and tamed my hair." Using this brush can be a bit of a workout, though. "This brush is bigger and heavier than many others I've tried," she adds.

When styling short hair, you want to make sure you can nab the roots without worrying about it burning your skin. Moroccanoil's heated brush received high scores in Lab testing for not burning the scalp or ears and for gripping hair well. It also has unique curved bristles that help you smooth hard-to-reach spots.

One area the brush didn't reach expectations: It took the longest of all the tested tools to heat up, which caused testers to rate it low for styling hair quickly. Users also wanted better instructions and noted that the placement of the buttons wasn’t ideal.

Testers say: "This is the best hair straightening brush I have ever used," raves one reviewer. "Saves time, silky finish, hair doesn't smell burnt when finished."

GH Beauty Lab testers loved that this Paul Mitchell brush straightened hair quickly without making it limp. Just FYI, it has just five heat setting options and no digital temperature display for those who like to see it.

Testers say: "This brush was easy to use and worked quickly," shares one. "I especially like how it doesn't flatten my hair the way regular straightening irons do; it still had good volume." Plus, "the effect stayed overnight without needing a touch up."

If you're looking for an option that's great for thin hair and has lots of setting options, this Drybar brush may be for you. Multiple testers with fine hair noted how well it worked on their hair type. However, it may not be ideal for those with thicker strands because it scored low in our testing for gripping and smoothing hair.

Tester says: "I was so pleased with the smooth and consistent results," shares one person. "This is a go-to styling tool for me now — I love it!"

To find the most effective hair straightening brush, take into consideration the following factors:

✔️ Material: Straightening brushes typically have ceramic and/or tourmaline bristles that heat up to straighten hair, notes Wnek.

✔️ Heat safety: While most heated hair brushes have cool-tip bristles, the GH Beauty Lab found that these types of brushes "should come with a heat protectant glove as many of our consumers indicated that they wanted to push hair into the bristles with a flat hand," says Wnek. "If the product you choose doesn’t contain a heat protectant glove, we encourage you to purchase one to keep hands safe from potential burns." Like flat iron plates, these bristles heat up to 300º or 400ºF or more, so take caution.

✔️ Voltage: Take a look at the voltage of your brush. Many are safe to use both at home and abroad, but always consult your instruction manual of the product you're using. "Standard voltage is 120V in the US and 220-240V in Europe," shares Wnek. "If you see a range like 110-220V in a product manual or on the product’s electricals, it indicates that it is dual voltage and can be used at home and abroad."

✔️ Auto shut-off: Consider shopping for hair straightening brushes that feature an automatic shut-off for safety. No need to second guess yourself trying to remember if you turned it off or unplugged it!

✔️ Multiple heat settings: Having multiple heat settings on your hair straightening brush is helpful depending on your hair type. Fine or thin hair types don't always need as much heat as thick hair.

It depends on the look you are going for. "You can achieve a sleeker pin-straight look with flat irons, and you can also get creative with looks like curling or flipping out the ends," says Wnek. Skilled users can even curl hair with a flat iron. Hair straightening brushes are more limited to the looks you can create. "Because they are a bit bulkier, consumers noted it was hard to get into roots and to flip or curl out ends," she explains.

Hair straightening brushes give hair a more natural, smooth look, are easy to use and save time by brushing hair as they straighten it. "The similarity with both tools is that you must use them on dry hair, and both can cause heat damage, so make sure to use heat protectant and keep the tool moving when in contact with hair."

"Hair straightening brushes are electric paddle brushes with ceramic and/or tourmaline bristles that heat up to straighten hair," explains Wnek. In simpler terms, these hot brushes are a paddle brush and flat iron in one. "Hot air brushes or hair dryer brushes, as we like to call this category in the Lab, are innovative styling tools that release warm/hot air through the circumferential surface of a round or oval brush," she says. Meaning, a hot air brush is an oval brush and hair dryer combined. "These brushes style and smooth hair by applying tension through the brush on the wet hair while evaporating the moisture from it to set it." They are a more user-friendly option for those who style their hair using a round brush and a hair dryer.

Since hot air brushes don't emit air through a concentrated point like hair dryers (but rather 360 degrees), they have a much weaker airflow than traditional hair dryers, which means they can take longer to dry hair. "The biggest difference of all is that hot air brushes can be used on damp hair while straightening brushes should only be used on dry hair," says Wnek.

GH Contributing Beauty Editor Dori Price updated this story, adding new information about testing, existing product picks and new picks. Dori has more than 15 years of experience researching and writing haircare and hairstyling stories, combining her knowledge with the expertise of top industry professionals such as hairstylists, hair colorists and trichologists. She is an expert in all hair product categories, from shampoos, conditioners, hair thickening products, styling products and tools to hair color, professional services and more.

For this story, she worked with GH Beauty Lab Senior Chemist Danusia Wnek, who coordinated and conducted the Lab testing on hair straightening brushes and also contributed her expertise on choosing the right brush. Wnek has spent seven years researching and developing testing protocols for haircare products within the GH Institute, including flat irons and hair dryer brushes.

GH Beauty Assistant Catharine Malzahn works closely with our pros to help deliver fact-based, science-backed beauty coverage. Over the years, she has interviewed experts, written product reviews and tested hundreds of hair products, including professional hair treatments, hot tools, shampoos, conditioners, styling products and more. She wrote this original guide.