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Head to head · Prices checked Nov 12, 2026

Firstblood B81 vs Lofree Foundation

Get the Firstblood B81 for knob. Get the Lofree Foundation for the 4,000 mAh battery.

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Quick verdict

Which one should you get?

Get the

Firstblood B81

Knob

Build quality in the top 45% of 75% boards under $150.

Rules this board out

  • North-facing LEDs. Cherry-profile keycaps can hit the switch housing.

Get the

Lofree Foundation

Battery

Build quality in the bottom 40% of 75% boards under $200.

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.

Firstblood B81

Lofree Foundation

  • Battery

    3,750 mAh

    4,000 mAh

    A larger battery means fewer cables during the day

  • Case material

    Acrylic

    ABS

  • Knob

    Yes

    No

  • Weight

    1,500 g

    972 g

    Heavier boards stay planted and lighter ones travel

  • Keycaps

    ABS, PBT, PC

    ABS, PC

KeebFinder scores

How we score
  • Firstblood B81
  • Lofree Foundation
Performance
68
68
Build quality
70
61
Productivity
91
77
Customizability
79
57
Portability
83
83

What they share

  • Layout size: 75%
  • Connection: Bluetooth, 2.4 GHz, Wired
  • Hot-swappable
  • Mount style: Gasket Mount
  • Sound dampening
See every spec side by side

Full specs

Firstblood B81 vs Lofree Foundation specs

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

10 of 23 specs differ

Firstblood B81

Lofree Foundation

Typing & switches

Switch options

Linear
—

Hot-swappable

Yes
Yes

Mount style

Gasket Mount
Gasket Mount

Sound dampening

Yes
Yes

Screw-in stabilizers

Yes
No

Layout

Layout size

75%
75%

Layout standard

ANSI
ANSI

Ergonomics

Standard
Standard

Knob

Yes
No

Display

None
None

Media keys

Yes
No

Connectivity & battery

Connection

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

Max polling rate

—
1,000 Hz

Battery

3,750 mAh
4,000 mAhBetter

USB-C

Yes
Yes

Build & materials

Case material

Acrylic
ABS

Keycaps

ABS, PBT, PC
ABS, PC

Weight

1,500 g
972 g

Dimensions

100 x 480 x 220 mm
44 x 325 x 161 mm

Backlight

RGB, north-facing
White

Firmware & software

N-key rollover

No
Yes

Mac & Windows

Yes
Yes

Extras

Released

2023
2023

Where to buy

Compare prices

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

Prices in USD are converted to your currency and can change at any time. KeebFinder may earn a commission when you buy through these links, at no extra cost to you.

Lowest price across stores, Amazon excluded.

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