Best Robot Vacuums · head-to-head
iRobot Roomba j9+ vs Roborock S8 MaxV Ultra
A sourced, side-by-side spec comparison. iRobot Roomba j9+ is cheaper at $899. Every spec and price links to its source.
Side by side
| iRobot Roomba j9+ | Roborock S8 MaxV Ultra | |
|---|---|---|
| US price | $899 (US launch MSRP $899 (vacuum-only) confirmed by TechCrunch (Sep 10, 2023) and Reviewed (Sep 11, 2023) launch coverage; Combo j9+ launched at $1,399 same day. iRobot.com product page no longer displays an MSRP. Frequently discounted to ~$499 in 2025-2026 retail.) | $1799 (US MSRP $1,799.99 at launch (April 2024) per us.roborock.com product page and Digital Trends review. Now heavily discounted to ~$799.99 on sale; launch price used as MSRP.) |
| Brand | iRobot | Roborock |
| Released | 2023 | 2024-04 |
| suction pa | — | 10000 |
| mapping | Imprint Smart Mapping (camera-based PrecisionVision Navigation) | PreciSense LiDAR Navigation |
| self empty | true | true |
| mopping | false | true |
| battery min | — | 180 |
| obstacle avoidance | PrecisionVision Navigation — recognizes and avoids pet waste, cords, shoes, socks | Reactive AI 2.0 — 3D structured light + RGB camera, 73 object types recognized |
| app | iRobot Home | Roborock |
| release | 2023 | 2024-04 |
Sources — iRobot Roomba j9+: irobot.com (verified 2026-06-15). Roborock S8 MaxV Ultra: us.roborock.com (verified 2026-06-15).