KI Signia vs Humanscale Diffrient Smart

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

KI Signia

$930 – $1,076

Humanscale

Humanscale Diffrient Smart

$1,987

$1,057

lower starting price for KI Signia than Humanscale Diffrient Smart at the brand stores

Differences at a glance

KI SigniaHumanscale Diffrient Smart

Price: $930 – $1,076$1,987
Seat height: 17.5–22 in (44.5–55.9 cm)16.5” – 22.8”
Seat depth: 17–20 in (43.2–50.8 cm)16.25” - 18.75” seat depth adjustment range
Recline: Five-position back travel limiter provides up to 27 degrees of recline18° recline + 8° backrest tilt
Arms: Armless, fixed reverse cantilever conference arms, 1D adjustable arms, or 4D adjustable armsFixed Duron Arms / Adjustable Duron Arms / 4D Adj Duron Arms / Armless
Lumbar support: Optional lumbar support with 2.5" of vertical adjustmentTri-panel Form-Sensing mesh adapts its lumbar support to each user (no manual lumbar adjustment)
Warranty: Lifetime15-year, 24/7 warranty

Which is cheaper, the KI Signia or the Humanscale Diffrient Smart?

The KI Signia is cheaper to start: $930 versus $1,987 for the Humanscale Diffrient Smart at the brand stores (Sep 2026).