SIHOO Doro S100 vs FlexiSpot Standard Ergo Office Chair (C4)

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

SIHOO

SIHOO Doro S100

$499.99 – $509.99

FlexiSpot

FlexiSpot Standard Ergo Office Chair (C4)

$219.99 – $239.99

$280

lower starting price for FlexiSpot Standard Ergo Office Chair (C4) than SIHOO Doro S100 at the brand stores

Differences at a glance

SIHOO Doro S100FlexiSpot Standard Ergo Office Chair (C4)

Price: $499.99 – $509.99$219.99 – $239.99
Seat height: 46–54 cm17.91–20.87 in
Seat depth: 15.15–17.12 in (≈ 38.5-43.5 cm)19.49 in
Load capacity: 330 lb (≈ 150 kg)300 lb
Recline: Reclines up to 135°90–135°
Arms: 4D 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°3D
Headrest: Integrated headrest adjusts up or down; upper backrest in five levels3D
Lumbar support: Dual dynamic lumbar supportfixed
Warranty: 3 years5 years

Which is cheaper, the SIHOO Doro S100 or the FlexiSpot Standard Ergo Office Chair (C4)?

The FlexiSpot Standard Ergo Office Chair (C4) is cheaper to start: $219.99 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 Standard Ergo Office Chair (C4).

Which has a headrest?

Both: the SIHOO Doro S100 as standard and the FlexiSpot Standard Ergo Office Chair (C4) as standard.