Head to head
Aria vs UBTech U1
Aria (Realbotix, from $125,000) against UBTech U1 (UBTech Robotics, from $17,650), side by side on price, realism, specifications and availability.
The short version
- Aria scores higher on our Realism Index: 64/100 to UBTech U1's 60. The widest gap is reality (75 vs 34).
- UBTech U1 is the cheaper way in: $17,650 against $125,000.
- Aria is no longer listed by its maker; UBTech U1 is on preorder.
- Aria also carries a $199.99/month software subscription.
Composed from the two directory records, so it updates when they do.
Our verdict
This is the face against the legs. Aria has the stronger face and skin (85 and 80 against 76 and 70) and the longer track record, with a reality score of 75 against the U1's 34. The U1 walks, sits and stands on flat indoor floors, which Aria on its wheeled base can't, and even its full-body Pro trim, at about $25,000, costs a fraction of Aria's last listed $125,000. The catches differ: Realbotix stopped listing the F-Series Aria in October 2026, while the U1 has a two-to-four-hour battery and emotion-reading figures that remain company claims.
- Pick Aria if
- Pick Aria if the face matters most and Realbotix confirms it will still build one; the Aria character is also coming to the cheaper Echo in 2027.
- Pick UBTech U1 if
- Pick the U1 if you want a lifelike companion that can walk across the room, at a price that starts in five figures.
Aria64/100
UBTech U160/100
Realism Index sub-scores — six weighted dimensions built from public evidence. How we score
 |  | |
|---|---|---|
| Status | Unlisted | Pre-order |
| Type | Companion | Companion |
| Form | Full body | Full body |
| Presents as | Female-presenting | Male- or female-presenting |
| Price | Last listed Sept 2026: F-Series from $125k, M-Series from $95k, bust from $20k, plus $199.99/mo AI (launched at $175k). No longer on Realbotix's site, so confirm with Realbotix. The Aria persona is now also sold on Echo: $11,950 tabletop or $59,950 full body, deliveries H2 2027. | U1 Lite (semi-torso) from ¥119,800 (~$17,650); full-body U1 Pro ¥169,800 (~$25,000); high-dynamic U1 Ultra up to ¥990,000 (~$146,500). Adults only. |
| Subscription | $199.99/mo | — |
| Availability | Last listed Sept 2026 | Preorder · deliveries claimed, no unit count |
| Origin | USA | China |
| Realism index | 64/100 | 60/100 |
| Height | 175 cm · 5 ft 9 in (F-Series, third-party) | Male 183 cm (6 ft 0 in) · Female 168 cm (5 ft 6 in) |
| Weight | ~54 kg (F-Series, third-party) | Male 42 kg · Female 35.2 kg |
| Skin & materials | Platinum-cure silicone over an articulated frame | Proprietary biomimetic silicone skin; realistic hair; expressive face |
| Actuation | Electric servos. F-Series: 17 facial motors, up to 44 DOF; Echo Full Body: 39 DOF | 88 degrees of freedom; dual-pivot biomimetic neck; claims ~90% of basic human motion |
| Power | Built-in battery | Onboard rechargeable battery |
| Runtime | 4–8 hours (F-Series) | ~2–4 hours per charge |
| AI & conversation | Proprietary deep-learning conversation; AI-agnostic (cloud GPT or on-device) | Emotion-aware 'fast-and-slow' brain (100B+ params); ~500 ms reflexive response; 'Agent Memory OS' |
| Voice | Customisable voices | Conversational; speech-to-lip sync within ~20 ms |
| Mobility | Wheeled base — does not walk | Bipedal — walks, sits, stands on flat indoor floors; no stairs or rough terrain |
| Expressions | 17 facial motors; emotionally aware, tone-matching | Reads 20+ emotions from face, tone and speech (>90% claimed); adaptive expression |
| Languages | 100+ languages | Mandarin at launch; others undisclosed |
| Connectivity | Wi-Fi, Bluetooth | Wi-Fi; head-mounted cameras; encrypted memory stored on-device (Rockchip RK3588) |