GravaStar Mercury K1 vs WOBKEY Rainy75
Get the GravaStar Mercury K1 for its 8000mAh battery and three-sided streamer effect, or the WOBKEY Rainy75 for VIA and QMK support, ISO options, and layered sound dampening.
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from$139at WhatGeek
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from$139at MK
Which one should you get?
Get the
GravaStar Mercury K1
Battery
Build quality in the top 50% of 75% boards under $150.
- 8000mAh battery.
- Three-sided streamer effect described by the vendor.
- No ISO layout. ISO-DE, UK, and other ISO variants are not offered.
Get the
WOBKEY Rainy75
QMK
Build quality in the top 5% of 75% boards under $150.
- VIA and QMK support.
- ISO and ISO-DE layout options.
- PBT keycaps and poron, EPMD, PET foam, and PET insulation sound-absorption layers.
- South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
Get the Mercury K1 if its 8000mAh battery, lower listed weight, and three-sided streamer effect are the features you value. Get the Rainy75 if you want VIA and QMK support, ISO layout choices, PBT keycaps, and its specified sound-absorption layers. For shine-through keycaps, note that the Rainy75's south-facing LEDs leave their legends dark.
The differences that matter
Skip the 40-row spec sheet. These are the specs that change how each board feels, sounds, and fits your desk.
GravaStar Mercury K1
WOBKEY Rainy75
Battery
8,000 mAh
3,500 mAh
A larger battery means fewer cables during the day
Mount style
Gasket Mount
Gasket Mount, PCB Mount, Plate Mount
Weight
1,080 g
1,800 g
Heavier boards stay planted and lighter ones travel
QMK
No
Yes
The deep option when you want to remap every key
VIA
No
Yes
GUI remapping without compiling firmware
- GravaStar Mercury K1
- WOBKEY Rainy75
- Performance
- 6570
- Build quality
- 6790
- Productivity
- 6794
- Customizability
- 6394
- Portability
- 9281
- Layout size: 75%
- Connection: Bluetooth, 2.4 GHz, Wired
- Hot-swappable
- Case material: Aluminum
- Switch options: Linear
What will you mostly use it for?
The Rainy75 has the clearer edge for office work, programming, modding, and creator setups, largely through its programming support, ISO options, and sound-dampening construction. The Mercury K1 is the more travel-oriented choice by listed weight and battery capacity. Gaming is a close call because both have linear switches and multiple wired and wireless connection options, with no clear differentiator established here. The choice is between the Mercury K1's battery and visual effect and the Rainy75's customization and layout flexibility.
It's a tie
- Both use linear switches and offer wired, 2.4 GHz, and Bluetooth connectivity.
- The Mercury K1 vendor describes its design as suited to intense gaming, while the Rainy75 has HMX Violet linear switches with 45g actuation force.
GravaStar Mercury K1 vs WOBKEY Rainy75 specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
11 of 22 specs differ
GravaStar Mercury K1
WOBKEY Rainy75
Switch options
Hot-swappable
Mount style
Sound dampening
Screw-in stabilizers
Layout size
Layout standard
Ergonomics
Display
Connection
Battery
USB-C
Case material
Plate material
Keycaps
Weight
Dimensions
Backlight
QMK
VIA
Mac & Windows
Released
Compare prices
Live prices from the stores we track, cheapest in-stock offer first.
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Lowest price across stores, Amazon excluded.
ISO layouts by store
Which stores sell ISO-DE, UK, and the other regional layouts.
GravaStar Mercury K1
No ISO layout at the stores we track.
WOBKEY Rainy75
- Go to Input Gear
Input Gear
ISO-DE
Out of stockShips to you
GravaStar Mercury K1 vs WOBKEY Rainy75: your questions
The Rainy75 is the more programming-focused pick here, with listed VIA and QMK support. It also offers ISO and ISO-DE layouts alongside ANSI.
The Mercury K1 has an 8000mAh battery. The Rainy75 has a 3500mAh battery.
Yes, the Rainy75 lists VIA support. Its vendor description says it can be programmed with VIA over wired and 2.4 GHz modes.
The Rainy75's product listing includes QMK support. The Mercury K1's listed extra features do not name QMK support.
No ISO layout is offered for the Mercury K1. The listed options exclude ISO-DE, UK, and other ISO variants.
Yes, ISO-DE is among the Rainy75's listed layout options, along with ANSI and ISO. Check the specific variant before ordering.
The Mercury K1 is listed at 1080g, while the Rainy75 is listed at 1800g. The Mercury K1 is the lighter of the two by those listed weights.
The Rainy75 has south-facing LEDs, and its compatibility note says shine-through legends stay dark. It also warns that some sculpted keycaps can clip the LED.
The Rainy75 vendor description names poron, EPMD, PET foam, and a PET insulation sheet. These are listed as layers for sound absorption.
Both keyboards are listed as hot-swappable. The Mercury K1 vendor description says its sockets support 3-pin and 5-pin switches.
Both list Bluetooth, 2.4 GHz, and wired connectivity. The Mercury K1 has the larger listed battery at 8000mAh, while the Rainy75 lists 3500mAh.
The Rainy75 vendor description specifies double-shot PBT keycaps. Its south-facing LEDs may leave shine-through legends dark.
Not sold on either?
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