Autonomous ErgoChair Ultra 2 vs SIHOO M18
Side by side from official specifications, sourced prices and User Insights. No written comparison exists for this pair yet.
$159.01
lower starting price for SIHOO M18 than Autonomous ErgoChair Ultra 2 at the brand stores
Differences at a glance
Sources
- Flex-Frame Ergonomic Office Chair | Autonomous ErgoChair Ultra 2 ↗Checked Oct 17, 2026
- M18 Classic Ergonomischer Bürostuhl – SIHOO DE official store ↗Checked Oct 16, 2026
- Sihoo M18 Ergonomic Office Chair – Official US Sihoo Store ↗Checked Sep 29, 2026
Autonomous ErgoChair Ultra 2SIHOO M18
- Price
- $449$289.99 – $299.99
- Seat height
- 18–23 in44–54 cm
- Seat depth
- 18–20.5 in17.91 in (≈ 45.5 cm)
- Load capacity
- 320 lb330 lb (≈ 150 kg)
- Recline
- 25°Maximum 126° recline angle
- Headrest
- optionalHeadrest moves 3.9" up and down and pivots 45°
- Warranty
- lifetime3 years
Questions
Which is cheaper, the Autonomous ErgoChair Ultra 2 or the SIHOO M18?
The SIHOO M18 is cheaper to start: $289.99 versus $449 for the Autonomous ErgoChair Ultra 2 at the brand stores (Oct 2026).
Which has a higher weight capacity?
The SIHOO M18, rated for 330 lb versus 320 lb for the Autonomous ErgoChair Ultra 2.
Which has a headrest?
Both: the Autonomous ErgoChair Ultra 2 as an option and the SIHOO M18 as standard.
Autonomous ErgoChair Ultra 2: specs, reviews, where to buy →SIHOO M18: specs, reviews, where to buy →
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