EngineAI
EngineAI PM01
- Autonomy
- IIAssisted
- Pre-release
- 49/100Concept Stage
- Readiness
- Not assessed
- Price
- Not tracked
ComparisonEngineAI PM01 and Zeroth Bridge
Zeroth
Zeroth Bridge
- Autonomy
- IIAssisted
- Pre-release
- 54/100Plausible
- Readiness
- Not assessed
- Price
- $3,999list
Up to three
Autonomy Ladder
- IManual
- IIAssisted
- IIIConditional
- IVEnvironmental
- VGeneralized
All humanoid robots. Every figure below is placed against the whole class, so a gap can be read against how much the class itself varies.
Where each one suits you.
The conditions each robot was assessed against, side by side. Rows marked in gold are where these machines genuinely differ.
| Condition | EngineAI PM01 | Zeroth Bridge |
|---|---|---|
| Where it operates | ||
| Home / residentialthey differ | PoorNo consumer support or home-use documentation; developer platform only. | DependsSmall enough for a home at 88 cm and 13 kg, but it ships with motion routines, not household tasks. |
| Office / retailthey differ | PoorNot positioned for commercial deployment without significant integration work. | DependsZeroth sells it to universities, research teams and developers; no commercial deployment is documented. |
| Warehouse / factorythey differ | DependsPossible in research or pilot deployments with technical staff; no production SLA. | PoorA 2 kg gripper payload and 10 N·m joints are sized for development benches, not industrial work. |
| Primary tasks | ||
| Household chores | PoorNo published task capability or manipulation scope beyond research prototyping. | PoorBuilt-in skills are walking, squatting, dancing and backflips; no chore routine appears in any source reviewed. |
| Social / carethey differ | PoorNo documented interaction or communication features. | DependsA microphone array and touch sensing are listed, but no conversational software is described for Bridge. |
| Specialized job | GoodMobile manipulation research and algorithm development are core. | GoodAn open SDK, motion-control APIs and teleoperation let developers build their own specialized skills. |
| Supervision needs | ||
| Fully autonomous | PoorDeveloper platform requires active monitoring and iterative debugging. | PoorControl is replayed motion or live teleoperation; no unattended task operation is documented. |
| With oversightthey differ | GoodLab or research environment with technical staff is the intended context. | DependsFall recovery and emergency-stop behavior are undocumented, so an operator should stay close during dynamic routines. |
| Teleoperated | GoodEarly-access or pilot deployments with engineering support suit the platform. | GoodTele_Bridge gives a developer real-time whole-body control with VR support, the mode Zeroth designed it for. |
| Timeline | ||
| Ready today | PoorPre-release; not consumer-ready or production-hardened. | PoorFirst-batch units are a pre-order with no delivery date on Zeroth's store. |
| Near-term (1–2 yrs) | DependsPossible broader release after research validation; no timeline published. | DependsOrders are open in the US and China, but neither channel states when units deliver. |
| Research phase | GoodCore design intent for developer and research-market deployment. | GoodPitched at research teams, with SDK beta and simulation access starting 14 Sep 2026. |
A robot being poor for a condition is a fact about fit, not a fault. “Depends” means the record names a limit worth reading, not that the answer is unknown.
How much the claim can be trusted.
None of these has shipped, so they are assessed on track record, engineering plausibility and how the demonstrations match the claims.
Track Record35% of score
Has this maker shipped what it demoed before, on schedule, with the promised capability?
3538
- EngineAI PM0135
- Zeroth Bridge38
28median 69 across 80 pre-release records100
Engineering35% of score
Are the demonstrated capabilities achievable in shipping form, or do they need breakthroughs not in evidence?
5766
- EngineAI PM0157
- Zeroth Bridge66
35median 70 across 87 pre-release records100
Demo Match30% of score
What has been shown to work, against what is claimed in marketing.
5758
- EngineAI PM0157
- Zeroth Bridge58
30median 66 across 87 pre-release records100
Published beside the number
Never averaged into it. These describe how much the maker has disclosed, not what the machine does.
| EngineAI PM01 | Zeroth Bridge | |
|---|---|---|
| ReadinessShip-date specificity, pricing transparency, distribution and regulatory status. Published beside the number; never averaged in. | 40/100 | 60/100 |
| DisclosureHow much of the product is disclosed. Higher means fewer fundamental unknowns remain. Published beside the number; never averaged in. | 55/100 | 45/100 |
How far apart is a long way?
A number only means something next to the spread it sits in. Each track is the real range across every classified robot in the class, with the median marked.
Weight48 with a published figure
88.2 lbs28.7 lbs
- EngineAI PM0188.2 lbs
- Zeroth Bridge28.7 lbs
26.5 lbsmedian 142.6 lbs661.4 lbs
Height51 with a published figure
54.3 in34.7 in
- EngineAI PM0154.3 in
- Zeroth Bridge34.7 in
34.7 inmedian 66.9 in86.6 in
Not compared, because fewer than two of these robots carry a published figure: Price, Runtime, Charge time, Noise.
What the numbers leave out.
Written on each record, and the only thing here every robot on the site carries.
The trade-off
What each design gives up to be good at what it is good at.
EngineAI PM01
Compact form reduces footprint and power demand; carrying capacity and dexterity are constrained compared to full-size research platforms.
Developer pricing attracts research teams; minimal or no consumer support infrastructure means buyer assumes integration and troubleshooting burden.
Zeroth Bridge
$3,999 buys a biped with a published joint map and no published runtime.
Because control is replayed motion or live teleoperation, every new behavior is something a developer has to build.
Two weights on one page: about 10 kg in the header, about 13 kg in the spec table.
Who each one is wrong for
Stated by the record itself. A robot being wrong for a household is a fact about fit, not a fault.
EngineAI PM01
- Consumers without robotics engineering background
- Developer platform assumes technical literacy for integration, debugging, and firmware work.
- Organizations seeking production-ready deployment
- No published SLA, warranty, or commercial support structure. Research timelines, not production schedules.
- Commercial operations requiring uptime guarantees
- Early-access platform without documented reliability data or service agreements.
Zeroth Bridge
- Households expecting a robot that does chores
- Launch materials list walking, squatting, dancing, backflips and obstacle avoidance as its built-in skills. None of the sources reviewed describes a household task such as tidying, fetching or laundry.
- Buyers who need a firm delivery date
- Zeroth's store calls the first batch a pre-order and names no ship window. Chinese coverage reports 1,000 JD.com units sold within a week without stating when they deliver.
- Anyone wanting unattended operation around people or pets
- Control runs through replayed motion or live teleoperation, and no fall-recovery or emergency-stop behavior is documented for a 13 kg machine that performs backflips.
- Projects that need camera-based perception out of the box
- The sensor list names an IMU, a circular microphone array and capacitive touch sensing and does not list a camera, although obstacle avoidance is advertised. Confirm the perception hardware before planning vision work.
- Manipulation work needing heavy payloads or dexterous hands
- The end effector is a two-finger gripper rated for 2 kg, on arms reaching 30 to 40 cm, which limits the platform to light, simple grasps.
What stays your job
The upkeep ownership hands back to you, whatever the autonomy level says.
EngineAI PM01
- After every test session: Joint inspection, lubrication, and actuator stress assessment.
- Weekly: Battery health monitoring and charge-cycle documentation.
- Monthly: Sensor calibration (IMU, camera, proprioception) and firmware update checks.
- Seasonally: Deep thermal and mechanical inspection; gait tuning per algorithm evolution.
Zeroth Bridge
- After every use: Recharge the pack; Zeroth lists a 12.6 V, 3.2 A charging input but no runtime or charge time.
- After every use: Clear a flat area before walking or acrobatic routines, since fall recovery is undocumented.
- As needed: Update the OpenBridge SDK and robot firmware as Zeroth releases builds.
- As needed: Inspect joints and two-finger grippers after falls or backflips; no inspection interval is published.
- As needed: Keep operation within the 32-104°F range Zeroth lists.
How much each of these is standing on.
Classifications rest on different depths of evidence. A pre-release assessment and a verified one are not the same kind of claim.
| Robot | Evidence status | Sources reviewed | Last assessed |
|---|---|---|---|
| EngineAI PM01 | Not Consumer-Ready | 4 | Sep 2026 |
| Zeroth Bridge | Pre-Release | 6 | Sep 2026 |
Evidence status counts the sources behind a classification, not their kind. A high count can be maker documentation and price coverage, so read it as how much was reviewed rather than as independent testing. How we weigh evidence.
Keep going.
The full recordEngineAI PM01Specifications, evidence, the Fit Check in full, and every tracked change.
The full recordZeroth BridgeSpecifications, evidence, the Fit Check in full, and every tracked change.Robovations classifies robots; it does not rank them. Nothing on this page is a recommendation, and no manufacturer influences a classification or its placement here.
Add a robot
Comparing across classes is allowed — the page will switch to per-class positioning and tell you it has.