In-ear monitors and earbuds both go in your ears, but they are built for different priorities. IEMs put everything into sound and isolation, while wireless earbuds trade some sound quality for convenience, microphones, and noise canceling.
IEMs are wired earbuds that seal deep in your ear, sound better for the money, never need charging, and have no lag. They are for music lovers and performers.
Wireless earbuds are more convenient, with mics, touch controls, and often noise canceling. They are the better choice for commuting, the gym, and calls.
People use "IEMs" and "earbuds" to mean slightly different things, and the line between them has blurred. Here's how the terms are usually used today.
In-ear monitors (IEMs) seal deep in your ear canal, usually have a wired, detachable cable, and are tuned for accurate sound. They started out as stage monitors that let musicians hear themselves over a loud band, and they're now the go-to choice for audiophiles who want great sound in a small package.
Earbuds usually means wireless earbuds like AirPods Pro, or basic wired buds like the EarPods that came with older phones. Wireless earbuds also seal in your ear, but they trade some sound quality for convenience: no cable, a charging case, a microphone, touch controls, and often active noise canceling. Basic open-fit earbuds rest at the entrance of your ear and don't seal at all.
| Wired IEMs | Wireless earbuds | Open-fit earbuds | |
|---|---|---|---|
| Fit | Deep seal in the ear canal | Seal in the ear canal | Rest outside the canal |
| Sound quality per dollar | Best | Good, limited by Bluetooth | Basic, weak bass |
| Blocking noise | Very good, passive | Excellent with noise canceling | Almost none |
| Battery | None needed | About 5 to 9 hours, plus case | None (wired) |
| Microphone | Usually not | Yes | Usually yes |
| Lag with video and games | None | Small Bluetooth delay | None |
| Lifespan | Many years; the cable is replaceable | Until the battery wears out | Until the cable breaks |
| Best for | Music at home and on the go, stage use | Commuting, gym, calls | Calls, casual listening |
Wireless earbuds have to fit a battery, a Bluetooth chip, microphones, and an amplifier into a shell that also holds the driver. IEMs only have to hold the driver, so all the design effort goes into sound. A wired connection also avoids Bluetooth compression, though for most people with good earbuds, the bigger difference is tuning rather than the codec.
That's why a $60 IEM like the TRUTHEAR ZERO can sound cleaner and more natural than wireless earbuds costing $200 or more. The best wireless earbuds have closed the gap, and many let you adjust the sound with an EQ app, but for the money, wired IEMs still win.
It depends on the noise. A deep-fitting IEM like the Etymotic ER4XR blocks voices and high-pitched sounds extremely well, with no battery. Wireless earbuds with active noise canceling, like the Sony WF-1000XM6 or AirPods Pro 3, are better at low, steady rumble from engines and trains, which is hard to block passively. For flights, noise-canceling earbuds or over-ear headphones are usually the better choice; see our best noise-canceling headphones.
On stage, "in-ear monitors" means the whole system: a wireless receiver pack on your belt that sends your monitor mix to wired IEMs. Musicians use wired IEMs because Bluetooth earbuds add a delay that makes it impossible to play in time. If you perform, choose IEMs with a secure over-ear cable and strong isolation, like the Sony IER-M500 or Xvive T7 in our best IEMs guide.
For IEMs, our best IEMs guide runs from the budget TRUTHEAR ZERO and the Meze ALBA to the Sennheiser IE 900, mostly picked from RTINGS' lab tests. For wireless, our best noise-canceling headphones guide includes the best noise-canceling earbuds from Sony, Apple, and Anker. If you want wired earbuds with a mic or a USB-C plug, see our best wired earbuds. And for an overview of every style, start with our guide to headphone types.