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Verdict: The Roborock S8 remains one of the most capable hybrid vacuum-and-mop robots in its class. Its 6,000 Pa of suction, dual rubber roller brushes, and VibraRise 2.0 sonic mopping deliver a genuinely deep clean on both hard floors and carpets — and in 2026 it still holds up against newer rivals. It isn’t cheap, and the base unit has no self-emptying, but if you can find one at a good price, it’s an excellent buy for mixed-floor homes.
Roborock built its reputation by shipping robots that clean like they mean it, and the S8 is the model that crystallized that identity. Launched as the flagship of the S8 line, it introduced the DuoRoller brush system and VibraRise 2.0 sonic mopping to Roborock’s mainstream lineup — features that are still the benchmark competitors get measured against. The S8 vacuumed, it mopped, it mapped multiple floors, and it dodged obstacles with structured-light 3D scanning.
But we’re in 2026 now, and the S8 has been succeeded by a parade of newer S8 variants — the S8 Pro Ultra, the S8 MaxV Ultra, and others. So the real question isn’t whether the S8 was great (it was), but whether it’s still worth buying today, what it does better than newer models, and where it shows its age. That’s what this review is for.
Key Features
The S8’s headline upgrades over its predecessor, the Roborock S7, were all about cleaning performance:
- 6,000 Pa HyperForce suction — double the suction of the S7 (2,500 Pa), among the strongest in its class at launch
- DuoRoller dual rubber brush system — two counter-rotating all-rubber rollers that dig into carpet and resist hair tangles far better than single bristle brushes
- VibraRise 2.0 sonic mopping — the mop pad scrubs at up to 3,000 vibrations per minute with 600 g (6N) of downward pressure, then lifts up to 5 mm when carpet is detected so you can vacuum and mop in a single run
- Ultrasonic carpet detection with Carpet Boost+ — senses carpet automatically and ramps suction up to maximum on carpeted areas
- PreciSense LiDAR navigation — fast, accurate mapping with multi-floor support for up to 4 floors
- Reactive 3D obstacle avoidance — structured-light plus infrared scanning that identifies and steers around common obstacles like shoes, cords, and pet waste
- 5,200 mAh battery — up to 180 minutes of runtime on a single charge
The S8 sits in the middle of Roborock’s lineup philosophy: the S8+ adds an auto-empty dock, and the S8 Pro Ultra pairs it with the full RockDock Ultra (self-emptying, mop washing, hot-air drying, and water refilling). The plain S8 reviewed here is the standalone robot — no dock in the box, but it is compatible with Roborock’s Empty Wash Fill Dock if you buy one separately.
Specs
| Spec | Detail |
|---|---|
| Suction power | 6,000 Pa (HyperForce) |
| Main brush | DuoRoller dual all-rubber rollers |
| Mopping | VibraRise 2.0 sonic mop, up to 3,000 scrubs/min, 6N pressure, 5 mm auto-lift |
| Carpet detection | Ultrasonic with Carpet Boost+ |
| Navigation | PreciSense LiDAR, Reactive 3D obstacle avoidance (structured light + IR) |
| Mapping | Multi-floor, up to 4 floors |
| Battery | 5,200 mAh, up to 180 min runtime |
| Dustbin | 400 mL |
| Water tank | 300 mL |
| Noise | ~67–68.5 dB |
| Wi-Fi | 2.4 GHz only |
| Voice control | Alexa, Google Home, Siri Shortcuts |
| Dock compatibility | Roborock Empty Wash Fill Dock (sold separately) |
| Self-emptying in base unit | No |
Vacuum Performance
This is where the S8 earns its keep. The 6,000 Pa of suction is genuinely powerful — on hard floors, it picks up everything from fine dust to cereal-sized debris in a single pass. On carpet, the DuoRoller system makes the biggest difference. Two counter-rotating rubber rollers agitate carpet fibers far more effectively than the single bristle-rubber hybrid brushes that dominated this price class, and independent testing at launch consistently showed the S8 pulling impressive amounts of embedded dirt from medium-pile carpet.
Carpet Boost+ matters here too. The S8 detects carpet via its ultrasonic sensor and automatically maxes out suction, then drops back down on hard floors to save battery and reduce noise. In real homes, this means you don’t have to think about it — the robot just cleans harder where it needs to.
Pet hair is the S8’s other strong suit. The all-rubber DuoRoller brushes shed hair instead of wrapping it, which is the single biggest maintenance win over older bristle brushes. If you live with a shedding dog or cat, you’ll empty the dustbin more often, but you won’t be cutting hair off the brush roll with scissors every week.
The trade-off for all that power is noise. At around 67–68.5 dB on high settings, the S8 is not a quiet robot. It’s comparable to a normal conversation-to-vacuum-cleaner range — fine when you’re out or in another room, noticeable if you’re on a call nearby. Balanced mode drops the noise considerably and is plenty for daily maintenance cleans.
Mopping Performance
The VibraRise 2.0 system is what separates the S8 from basic vacuum-mop combos that just drag a damp pad around. Scrubbing at up to 3,000 times per minute with 600 g of downward pressure, the mop pad genuinely scrubs — it handles dried-on kitchen spills, light stains, and everyday grime far better than passive mopping systems. It won’t replace a deep manual mopping session on truly filthy floors, but for weekly maintenance it’s excellent. If you’re still weighing a robot vacuum vs steam mop for your hard floors, the S8’s hybrid approach covers both jobs in one device.
The auto-lift is the clever part. When the ultrasonic sensor detects carpet, the mop module raises up to 5 mm, so the robot can vacuum carpets and mop hard floors in the same run without you swapping modules or setting no-mop zones. Roborock pioneered this with the original VibraRise on the S7, and the 2.0 version on the S8 lifts higher and scrubs harder.
One limitation: the S8’s 300 mL water tank is sized for maintenance mopping, not whole-house deep mopping of large homes. For a typical 1,000–1,500 sq ft of hard floor, it manages fine, but very large hard-floor areas may need a mid-run refill. And because the base unit has no mop-washing dock, you’ll want to rinse the mop pad yourself after each run — a 30-second job, but a job.
Navigation and Mapping
PreciSense LiDAR remains one of the best navigation systems you can get. The S8 maps quickly and accurately — first-run mapping of a typical home takes minutes, not the better part of an hour. Maps are precise enough for room-by-room scheduling, no-go zones, no-mop zones, and invisible walls, all drawn in the Roborock app.
Reactive 3D obstacle avoidance uses structured light and infrared to spot obstacles in its path. It handles the classics — shoes, cables, pet bowls, and yes, pet waste — with a reliability that was genuinely impressive at launch and still holds up well. It’s not the camera-based AI avoidance of the newest flagships, so it can occasionally miss very small or oddly-shaped objects, but for everyday clutter it keeps the robot moving without rescue missions.
Multi-floor mapping supports up to 4 floors, with the robot recognizing which floor it’s on automatically. If you’re short on space between runs, see our guide on how to store a robot vacuum. Combined with the 180-minute runtime, the S8 comfortably handles large multi-story homes — though you’ll be carrying it between floors yourself, as always.
The app experience is excellent: detailed maps, cleaning history, per-room suction and water-flow customization, scheduled cleaning, and voice control through Alexa, Google Home, and Siri. One note for 2026: the S8 connects over 2.4 GHz Wi-Fi only, which is standard for robot vacuums but means it won’t join a 5 GHz-only network.
Pros
- Powerful 6,000 Pa suction with genuine deep-clean performance on carpet
- DuoRoller dual rubber brushes resist hair tangles and agitate carpet well
- VibraRise 2.0 sonic mopping actually scrubs, with automatic mop lifting on carpet
- Fast, accurate LiDAR navigation with reliable 3D obstacle avoidance
- Multi-floor mapping (up to 4 floors) and long 180-minute runtime
- Excellent app with room-level customization and voice assistant support
- Compatible with the Empty Wash Fill Dock for a self-emptying upgrade path
Cons
- No self-emptying in the base unit — you’ll empty the 400 mL dustbin yourself
- Louder than average at max suction (~67–68.5 dB)
- 300 mL water tank needs refills on very large hard-floor areas
- 2.4 GHz Wi-Fi only
- Newer S8 variants (Pro Ultra, MaxV Ultra) offer more features — though at higher prices
- The plain S8 is harder to find new in 2026, so pricing and availability vary
Who the Roborock S8 Is For
The S8 is ideal for homes with mixed flooring — hard floors plus area rugs or carpet — where you want one robot that vacuums and mops competently in a single run. Pet owners will appreciate the tangle-resistant DuoRoller brushes and the strong carpet pickup. It’s also a great fit if you want flagship-level cleaning performance without paying flagship-2026 prices, provided you can find one at a sensible price.
It’s less ideal if self-emptying is a must-have (look at the S8 Pro Ultra or newer models with full docks instead), if you need whisper-quiet operation, or if your home is almost entirely large-format hard flooring where a dedicated mopping specialist might serve you better. For a broader field, our roundup of the best robot vacuums compares the S8 against its closest rivals.
FAQ
Is the Roborock S8 still worth buying in 2026?
Yes, if the price is right. Its 6,000 Pa suction, DuoRoller brushes, and VibraRise 2.0 mopping still outperform most mid-range 2026 models on raw cleaning performance. The main thing you give up versus newer flagships is a bundled self-emptying dock and camera-based AI obstacle avoidance. Check current availability carefully — the plain S8 is harder to find new on Amazon now, and newer S8 variants are often priced close enough to make them the better buy.
Does the Roborock S8 empty itself?
No — not in the base configuration. The S8 has a 400 mL onboard dustbin that you empty manually. It is compatible with Roborock’s Empty Wash Fill Dock (sold separately), which adds self-emptying, mop washing, and water refilling. If self-emptying out of the box is a priority, consider the S8 Pro Ultra.
How does the S8 compare to the Roborock S7?
The S8 roughly doubles the S7’s suction (6,000 Pa vs 2,500 Pa), replaces the single brush with the dual rubber DuoRoller system, and upgrades mopping to VibraRise 2.0 with faster scrubbing and higher mop lift. Navigation and app features are broadly similar. If you own an S7 that still works, the upgrade is meaningful but not essential; if you’re buying fresh, the S8 is the better pick when priced similarly.
Can the S8 vacuum and mop at the same time?
Yes. Thanks to ultrasonic carpet detection and the auto-lifting mop module, the S8 can vacuum carpets at full suction while mopping hard floors in a single cleaning run — no module swapping or manual no-mop zones required for typical mixed-floor layouts.
How loud is the Roborock S8?
Around 67–68.5 dB at maximum suction, which is about average for a powerful robot vacuum — noticeable but not extreme. Balanced and Quiet modes are significantly quieter and sufficient for daily maintenance cleaning.
Does the Roborock S8 work with Alexa and Google Home?
Yes. The S8 works with Alexa, Google Home, and Siri Shortcuts for voice start/stop, room-specific cleaning, and dock commands. Note it connects via 2.4 GHz Wi-Fi only.
Final Verdict
The Roborock S8 is one of those rare products that aged gracefully. Its core cleaning hardware — 6,000 Pa suction, dual rubber rollers, sonic scrubbing mops — remains genuinely competitive in 2026, and its LiDAR navigation is still among the best available. The missing self-emptying dock and the louder-than-average max mode are real compromises, but they’re the kind you can live with when the cleaning itself is this good.
One honest caveat: the plain S8 is harder to find new on Amazon now, so check current availability before setting your heart on it — and compare against newer S8 variants, which are sometimes priced within striking distance. But if you find the S8 at a good price, you’re getting a robot that cleans like a flagship for mid-range money. For mixed-floor homes and pet owners especially, it remains one of the smartest buys in the robot vacuum world.