Humanscale Freedom vs SIHOO M18

Side by side from official specifications, sourced prices and User Insights. No written comparison exists for this pair yet.

Humanscale

Humanscale Freedom

$1,494 – $2,567

SIHOO

SIHOO M18

$289.99 – $299.99

$1,204.01

lower starting price for SIHOO M18 than Humanscale Freedom at the brand stores

Differences at a glance

Humanscale FreedomSIHOO M18

Price: $1,494 – $2,567$289.99 – $299.99
Seat height: 16.125–20.25 in (41–51.4 cm)44–54 cm
Seat depth: 17.4–19.85 in (44.2–50.4 cm)17.91 in (≈ 45.5 cm)
Load capacity: 400 lb (181.4 kg)330 lb (≈ 150 kg)
Recline: Weight-sensitive (self-adjusting) recline; 22° recline plus 7° backrest tilt; seat-to-back reference angle 100°–129°Maximum 126° recline angle
Arms: 6 in range of vertical motion; armrest height 3.75–9.6 in from compressed seatAdjustable armrests (Up and down)
Headrest: Freedom Headrest configuration: Dynamic Headrest, moves with the sitter on recline; 5 in vertical adjustment; 30° radial motionHeadrest moves 3.9" up and down and pivots 45°
Lumbar support: No separate lumbar adjustment; pivoting backrest gives up to 1 in additional lumbar supportLumbar support adjusts vertically and horizontally
Warranty: 15 years; fabric/cushions/arm pads/casters 5 years3 years

From 27 Humanscale Freedom and 5 SIHOO M18 user reviews, most mentioned first. Green is liked, orange is a caution.

Which is cheaper, the Humanscale Freedom or the SIHOO M18?

The SIHOO M18 is cheaper to start: $289.99 versus $1,494 for the Humanscale Freedom at the brand stores (Sep 2026).

Which has a higher weight capacity?

The Humanscale Freedom, rated for 400 lb versus 330 lb for the SIHOO M18.

Which has a headrest?

Both: the Humanscale Freedom as standard and the SIHOO M18 as standard.

What do owners mention most?

Adjustability for the Humanscale Freedom, and price and value for the SIHOO M18, based on review summaries.