Compare
Pick two boards from the directory and see how they differ.
Shaded rows are where they differ.
| Spec |  Keychron Keychron K3 Ultra-slim $85–$100 “K3 Ultra-slim, from Keychron's store” |  Keychron Keychron K3 Max $90–$110 “K3 Max, from Keychron's store” |
|---|---|---|
| Price , different | $85–$100 | $90–$110 |
| Size | 75% | 75% |
| Type | Pre-built | Pre-built |
| Connectivity | Wireless + Wired | Wireless + Wired |
| Released , different | 2020 | 2023 |
| Mounting , different | Tray Mount | Integrated Plate |
| Case | ABS with aluminum frame | ABS with aluminum frame |
| Colors , different | See the store | Black, White, White Gray |
| Weight , different | About 483 g | 525 g |
| Dimensions | 306 x 116 mm | 306 x 116 mm |
| Typing angle | Not listed | Not listed |
| Front height | Not listed | Not listed |
| Switches | Low Profile | Low Profile |
| Profile | Low Profile | Low Profile |
| Keycaps , different | ABS | Low-profile double-shot PBT |
| PCB | Hot-swap | Hot-swap |
| Plates | Not listed | Not listed |
| Battery , different | 1550 mAh, up to 34 hours | 1550 mAh, up to 73 hours |
| Compatible switches | Keychron low-profile | Keychron low-profile |
| Software , different | None (no QMK/VIA) | QMK, VIA, Keychron Launcher |
| NKRO | Yes | Yes |
| RGB | Yes | Yes |
| Features , different | 75% layout, Bluetooth 5.1 + USB-C, Hot-swap, Low profile | 75% layout, Tri-mode, Hot-swap, QMK/VIA, Low profile |
| Good for , different | Travelers who want a thin 75% for a laptop or tablet Buyers who want low-profile optical switches People who want a compact function row | Travelers who want a thin, dongle-equipped 75% QMK/VIA users who need a low-profile board People who split time between a PC and a tablet |
| Skip if , different | Anyone who needs QMK/VIA customization (see the K3 Pro) Gamers who want a 2.4 GHz dongle Typists who want full-height keycaps | Anyone who wants a rich, deep sound Gamers who want 8 kHz or Hall-effect features Buyers who want an all-day desk board |
| Pros , different | Very slim 75% with a function row (maker) Choice of low-profile mechanical or optical switches, hot-swappable Lightest K3 at about 483 g Bluetooth for three devices plus wired Siblings were praised for portability and switch feel (GGRecon, Gadgetoid) | 2.4 GHz at 1000 Hz, Bluetooth and wired (maker) SemiPro found the dongle connection stable QMK/VIA and PBT keycaps Foam improved sound slightly over the K3 Pro (SemiPro) Very thin and portable (Trusted Reviews) |
| Cons , different | Battery rated at only about 34 hours (maker) ABS keycaps rather than the PBT on later K3 models Wireless polling is 90 Hz over Bluetooth (maker) Wireless limited to Bluetooth, with no dongle Low-profile switches limit your keycap compatibility (Gadgetoid on the K3 Max) | Stabilizer rattle, especially on the space bar (SemiPro) Shorter battery life than the K3 Pro (SemiPro); rated up to 73 hours by Keychron Low-profile switch and keycap compatibility is limited (Gadgetoid) Trusted Reviews says it is niche Thin build means no wrist rest comfort (Trusted Reviews) |
| Research take , different | The base K3. Fine for portability, with the Pro and Max better equipped. | The thin travel board with a dongle. Stabilizers are a known weakness. |