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Head to head · Prices checked Oct 21, 2026

Epomaker TH87 vs Keychron J4

Get the Epomaker TH87 for the 10,000 mAh battery. Get the Keychron J4 for qmk and via.

What actually differs

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.

Epomaker TH87

Keychron J4

  • Battery

    10,000 mAh

    4,000 mAh

  • Switch options

    Linear, Silent

    Clicky, Linear, Tactile

  • QMK

    No

    Yes

  • VIA

    No

    Yes

  • Layout standard

    ANSI, ISO, ISO-DE, ISO-UK, JIS

    ANSI

KeebFinder scores

How we score
  • Epomaker TH87
  • Keychron J4
Performance
75
70
Build quality
60
71
Productivity
76
74
Customizability
58
86
Portability
85
66

What they share

  • Layout size: 80%
  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Max polling rate: 1,000 Hz
  • Sound dampening
  • Keycaps: PBT
See every spec side by side

From real owners

What owners say

Ratings and quotes collected from verified store reviews, including the critical ones.

Epomaker TH87

4.7

15 owner reviews

Praise
“Im really happy with the overall quality of the keyboard. The silent switches are really great for working and gaming as well.”
BootLoopMadnessVerified buyer· via Epomaker
Critique
“Ill start with the positives. - it sound creamy and has a great feel on the fingers. - a ten keyless that has all the functionality that i need In theory this is the perfect keyboard but i have had 1 issue that has been bugging me so much. Ever so often the…”
Tristen O.Verified buyer· via Epomaker

Keychron J4

No owner reviews collected yet.

Full specs

Epomaker TH87 vs Keychron J4 specs

Every tracked spec, side by side. Rows marked with a dot differ between the boards.

11 of 25 specs differ

Epomaker TH87

Keychron J4

Typing & switches

Switch options

Linear, Silent
Clicky, Linear, Tactile

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
—

Sound dampening

Yes
Yes

Layout

Layout size

80%
80%

Layout standard

ANSI, ISO, ISO-DE, ISO-UK, JIS
ANSI

Ergonomics

Standard
Standard

Display

None
None

Media keys

No
Yes

Connectivity & battery

Connection

Bluetooth, 2.4 GHz, Wired
Bluetooth, 2.4 GHz, Wired

Max polling rate

1,000 Hz
1,000 Hz

Battery

10,000 mAhBetter
4,000 mAh

USB-C

Yes
No

Build & materials

Case material

ABS
—

Plate material

Polycarbonate
Steel

Keycaps

PBT
PBT

Weight

1,000 g
—

Dimensions

41 x 367 x 142 mm
—

Typing angle

6°
—

Backlight

RGB, south-facing
RGB, north-facing

Firmware & software

QMK

No
Yes

VIA

No
Yes

N-key rollover

Yes
No

Mac & Windows

Yes
No

Extras

Released

2025
2025

Where to buy

Compare prices

Live prices from the stores we track, cheapest in-stock offer first.

Lowest price across stores, Amazon excluded.

  • EpomakerUS

    In stock
    $75Visit
  • AmazonGlobal

    Check price
    Visit
Keychron J42 stores
  • KeychronHK

    In stock
    $59Visit
  • AmazonGlobal

    Check price
    Visit

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