FlexiSpot C7 vs SIHOO M18

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

FlexiSpot

FlexiSpot C7

$429.99

SIHOO

SIHOO M18

$289.99 – $299.99

7 years

longer warranty on FlexiSpot C7 than SIHOO M18 (official terms)

Differences at a glance

FlexiSpot C7SIHOO M18

Price: $429.99$289.99 – $299.99
Seat height: 16.5–20.1 in (42-51 cm)44–54 cm
Seat depth: 17.3–20.5 in (44-52 cm)17.91 in (≈ 45.5 cm)
Load capacity: Mesh Version: 350 lbs; Foam Version: 300 lbs330 lb (≈ 150 kg)
Recline: 90–130°Maximum 126° recline angle
Arms: 3DAdjustable armrests (Up and down)
Headrest: 4DHeadrest moves 3.9" up and down and pivots 45°
Lumbar support: Adjustable Self-adaptive Dynamic & Forward and Backward AdjustableLumbar support adjusts vertically and horizontally
Warranty: 10 years3 years

From 2 FlexiSpot C7 and 5 SIHOO M18 user reviews, most mentioned first. Green is liked, orange is a caution.

Which is cheaper, the FlexiSpot C7 or the SIHOO M18?

The SIHOO M18 is cheaper to start: $289.99 versus $429.99 for the FlexiSpot C7 at the brand stores (Sep 2026).

Which has a headrest?

Both: the FlexiSpot C7 as standard and the SIHOO M18 as standard.

What do owners mention most?

Adjustability for the FlexiSpot C7, and price and value for the SIHOO M18, based on review summaries.