SIHOO Doro S300 vs KI Altus

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

SIHOO

SIHOO Doro S300

$999.99

KI Altus

$881 – $1,516

$118.99

lower starting price for KI Altus than SIHOO Doro S300 at the brand stores

Differences at a glance

SIHOO Doro S300KI Altus

Price: $999.99$881 – $1,516
Seat height: 47 – 55.5 cm (18.50 – 21.85 in)17–21.75 in (43.2–55.2 cm); 16.25–20.75 in (41.3–52.7 cm)
Seat depth: 40 – 47 cm (15.75 – 18.50 in)17.25–19.75 in (43.8–50.2 cm); 15.5–18 in (39.4–45.7 cm)
Load capacity: 330 lb (≈ 150 kg)supports up to 400 pounds
Arms: 6D coordinated armrests (up and down, left and right, front and back, inward and outward, with tilt-lock of armrests, and synchronized recline)Adjustable arms, fixed arms, or armless
Headrest: Soft, integrated headrest; upper backrest adjusts in 5 levelsHeadrest available (Mesh Task / Fabric Task Headrest Adjustable Armchair)
Lumbar support: Dual dynamic lumbar support; angle 90°-105° fine-tuned with the gas liftMesh chair: optional adjustable lumbar (height and depth); fabric chair: automatic lumbar support
Warranty: 3 yearsLifetime

Which is cheaper, the SIHOO Doro S300 or the KI Altus?

The KI Altus is cheaper to start: $881 versus $999.99 for the SIHOO Doro S300 at the brand stores (Oct 2026).

Which has a headrest?

Both: the SIHOO Doro S300 as standard and the KI Altus as standard.

What do owners mention most?

Breathability for the SIHOO Doro S300, and back support for the KI Altus, based on review summaries.