KI Altus vs FlexiSpot Soutien Ergonomic Office Chair (C5)

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

KI Altus

$881 – $1,516

FlexiSpot

FlexiSpot Soutien Ergonomic Office Chair (C5)

$249.99 – $279.99

$631.01

lower starting price for FlexiSpot Soutien Ergonomic Office Chair (C5) than KI Altus at the brand stores

Differences at a glance

KI AltusFlexiSpot Soutien Ergonomic Office Chair (C5)

Price: $881 – $1,516$249.99 – $279.99
Seat height: 17–21.75 in (43.2–55.2 cm); 16.25–20.75 in (41.3–52.7 cm)17.9–20.9 in
Seat depth: 17.25–19.75 in (43.8–50.2 cm); 15.5–18 in (39.4–45.7 cm)18.7 in
Load capacity: supports up to 400 pounds300 lb
Arms: Adjustable arms, fixed arms, or armless2D
Headrest: Headrest available (Mesh Task / Fabric Task Headrest Adjustable Armchair)2D
Lumbar support: Mesh chair: optional adjustable lumbar (height and depth); fabric chair: automatic lumbar support2D
Warranty: Lifetime5 years

Which is cheaper, the KI Altus or the FlexiSpot Soutien Ergonomic Office Chair (C5)?

The FlexiSpot Soutien Ergonomic Office Chair (C5) is cheaper to start: $249.99 versus $881 for the KI Altus at the brand stores (Sep 2026).

Which has a headrest?

Both: the KI Altus as standard and the FlexiSpot Soutien Ergonomic Office Chair (C5) as standard.