FlexiSpot Soutien Ergonomic Office Chair (C5) vs SIHOO Doro S100

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

FlexiSpot

FlexiSpot Soutien Ergonomic Office Chair (C5)

$249.99 – $279.99

SIHOO

SIHOO Doro S100

$499.99 – $509.99

$250

lower starting price for FlexiSpot Soutien Ergonomic Office Chair (C5) than SIHOO Doro S100 at the brand stores

Differences at a glance

FlexiSpot Soutien Ergonomic Office Chair (C5)SIHOO Doro S100

Price: $249.99 – $279.99$499.99 – $509.99
Seat height: 17.9–20.9 in46–54 cm
Seat depth: 18.7 in15.15–17.12 in (≈ 38.5-43.5 cm)
Load capacity: 300 lb330 lb (≈ 150 kg)
Recline: 95–115°Reclines up to 135°
Arms: 2D4D coordinated armrests (Up and down, left, right, forward and backward, tilt linkage); Up and down 2.76 in, forward and back 1.18 in, side to side, rotate 72°
Headrest: 2DIntegrated headrest adjusts up or down; upper backrest in five levels
Lumbar support: 2DDual dynamic lumbar support
Warranty: 5 years3 years

Which is cheaper, the FlexiSpot Soutien Ergonomic Office Chair (C5) or the SIHOO Doro S100?

The FlexiSpot Soutien Ergonomic Office Chair (C5) is cheaper to start: $249.99 versus $499.99 for the SIHOO Doro S100 at the brand stores (Oct 2026).

Which has a higher weight capacity?

The SIHOO Doro S100, rated for 330 lb versus 300 lb for the FlexiSpot Soutien Ergonomic Office Chair (C5).

Which has a headrest?

Both: the FlexiSpot Soutien Ergonomic Office Chair (C5) as standard and the SIHOO Doro S100 as standard.