Lefant M3 Series Robot Vacuum vs Roborock S8 Pro Ultra
Side-by-side comparison of features, pricing, ratings, and alternatives.
The M3 Series is Lefant's mid-range robot vacuum and mop line, sold as four tiers that share the same hot rotating mop system and self-emptying dock but differ in suction, water temperature and runtime. The entry M3 runs 12,000Pa and 55C mops with a 220-minute battery; the M3 Max steps up to 20,000Pa and 55C mops; and the flagship M3 Ultra reaches 23,000Pa with 70C hot rotating mops and 210 minutes of runtime. The common thread is hot-water mop washing, which matters because warm water lifts dried spills that cold water smears, and 8-week dust storage in the base so the bag only needs changing every couple of months. Lefant sells direct and bundles a 180-day accessory pack with official-store orders.
The Roborock S8 Pro Ultra combines robot vacuuming and mopping with a dock that automatically washes and hot-air dries the mop pad after each cleaning cycle, addressing the common complaint of dirty, smelly mop pads with other robot vacuum systems. A retractable mop lifts automatically when the robot detects carpet, preventing wet mopping cloths from soaking carpeted areas while vacuuming continues normally across all floor types. Reactive AI 2.0 obstacle avoidance combined with LiDAR navigation and multi-level mapping lets it clean multiple floors of a home intelligently, remembering furniture layout and no-go zones set through the companion app.
Around $1,599.99 MSRP, frequently discounted.
- Hot-water mopping at a price well below flagship brands
- Very long runtime across the range
- 8-week dust capacity means rare manual intervention
- Tiered lineup lets you pay only for the suction you need
- Genuinely reduces manual mop maintenance
- Smart carpet detection for mop lifting
- Strong navigation and mapping accuracy
- Good obstacle avoidance
- Stock availability varies by tier, with the Ultra frequently out of stock
- Suction figures are not directly comparable with other manufacturers' ratings
- Brand support and app polish trail the premium robot vacuum makers
- Premium price point
- Dock is large and needs dedicated space
- Mop washing uses additional water and detergent
What reviewers say
Lefant M3 Series Robot Vacuum Reviews
No reviews yet.
Roborock S8 Pro Ultra Reviews
4.3 (3)Solid choice
I picked up Roborock S8 Pro Ultra a while back and haven't looked back. Genuinely reduces manual mop maintenance. No major complaints so far. Would recommend.
Works, with some caveats
Roborock S8 Pro Ultra is solid overall, though it's not perfect. On the plus side, genuinely reduces manual mop maintenance. That said, dock is large and needs dedicated space, which held us back from rating it higher.
Solid choice
I picked up Roborock S8 Pro Ultra a while back and haven't looked back. Good obstacle avoidance. No major complaints so far. Would recommend.
More alternatives & similar tools
Alternatives to Lefant M3 Series Robot Vacuum
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18,000Pa robot vacuum with a self-washing roller mop and a hot-water OMNI station.
Alternatives to Roborock S8 Pro Ultra
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A self-emptying robot vacuum that avoids obstacles like pet waste and cords.
The Verdict
AI-generated from listing dataThe Lefant M3 series offers hot‑water mopping and an 8‑week self‑emptying dust bin at a budget price, while the Roborock S8 Pro Ultra provides premium navigation and automatic mop washing at a high cost.
Key differences
- •Dust storage: Lefant stores up to 8 weeks of debris; Roborock’s dust capacity not disclosed.
- •Mop handling: Lefant uses hot rotating mops (55‑70 °C); Roborock washes and dries pads automatically.
- •Navigation: Roborock features LiDAR mapping and Reactive AI 2.0; Lefant provides no navigation details.
- •Price: Lefant costs about $280; Roborock MSRP around $1,600.
- •Maintenance focus: Lefant emphasizes self‑emptying; Roborock emphasizes automatic mop cleaning.
Pricing & value
Lefant MSRP $279.99 vs Roborock around $1,599.99 – Lefant is far cheaper.
Dust capacity & self‑emptying
Lefant’s base stores up to 8 weeks of dust; Roborock’s dust capacity not specified.
Mop performance
Lefant offers hot rotating mop heads (55 °C M3/M3 Max, 70 °C Ultra); Roborock only washes/drys pads, no heat spec.
Navigation & mapping
Roborock includes LiDAR navigation, multi‑floor mapping, and Reactive AI 2.0; Lefant provides no navigation details.
Automation of mop maintenance
Roborock dock automatically washes and hot‑air dries mop pads; Lefant requires manual mop pad handling.
Warranty & support
Lefant includes 180‑day accessory warranty; Roborock warranty details not provided.
Choose Lefant M3 Series Robot Vacuum if…
Budget‑focused buyers who want hot‑water mopping and long dust‑bin life.
Choose Roborock S8 Pro Ultra if…
Premium buyers needing advanced navigation and fully automatic mop cleaning.
Common questions
How much does each robot cost?
Lefant M3 series MSRP $279.99; Roborock S8 Pro Ultra MSRP about $1,599.99 (often discounted).
Which model handles dust the most hands‑free?
Lefant stores up to 8 weeks of dust in its base, requiring only occasional bag changes.
Does either robot provide hot‑water mopping?
Yes, Lefant’s rotating mop heads heat to 55 °C (M3/M3 Max) or 70 °C (Ultra); Roborock does not heat the mop.