Comparison · 2 robots

Nori A3 · Zeroth Bridge

All humanoid robots. Every measure below is plotted against the full class, so a difference can be read against how much the class itself varies.

Nori A3
Zeroth Bridge

Nori Robotics

Nori A3

Autonomy: IIAssisted Autonomy
Score: 51/100 Plausible
Readiness: Not assessed
Price: $1,688list

Zeroth

Zeroth Bridge

Autonomy: IIAssisted Autonomy
Score: 54/100 Plausible
Readiness: Not assessed
Price: $3,999list

Up to three

01 Classification

What each one does on its own.

The Autonomy Ladder is the same five rungs for every robot on the site. A rung describes the conditions a robot handles without you, not how good it is.

Generalized

Any task, any setting

Environmental

Handles new obstacles without help

III

Conditional

Finishes familiar jobs on its own

Assisted

Runs preset routines, needs rescue

Nori A3Zeroth Bridge

Manual

One action, on command

02 Assessment

Where they actually differ.

The Robovations Score is nine inputs across three pillars, each weighted as shown and each scored so that more is better. A robot can lead on one and trail on another, which is the point of showing them apart. Cost of ownership and data handling are reported on each robot's own page and are never averaged into the score.

None of these robots carries a scored assessment yet, so there is nothing to plot here. The classification and evidence below still apply.

03 Measured against the class

How far apart is a long way?

A number only means something next to the spread it sits in. Each track below is the real range across every classified robot in the class, with the median marked.

Price18 with a published figure

$1,688$3,999

Nori A3$1,688
Zeroth Bridge$3,999

$1,385median $22,500$250,000

Weight47 with a published figure

45 lbs28.7 lbs

Nori A345 lbs
Zeroth Bridge28.7 lbs

26.5 lbsmedian 142.2 lbs661.4 lbs

Height50 with a published figure

57.1 in34.7 in

Nori A357.1 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: Suction, Runtime, Charge time, Noise.

04 Ownership

What the numbers leave out.

The trade-off

What each design gives up to be good at what it is good at.

Nori A3

At $1,688 you get the hardware; the chores are a project you record yourself.

Off-board inference keeps the onboard computer at Raspberry Pi 5 cost, which makes the home network part of the robot.

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.

Nori A3

Households wanting chores done on delivery: No independent source documents which tasks work when the robot arrives, and Nori's own paper reports no measured task performance. Routines are recorded as demonstrations first.
Multi-level homes needing help on more than one floor: The base is wheeled and differentially driven. Nothing in Nori's documentation describes stair climbing, so a second floor means carrying a 20.4 kg robot.
Homes with unreliable internet or no appetite for off-board processing: Policy inference runs on an off-board backend, and Nori's paper names network connectivity as a requirement. Without it, the onboard Raspberry Pi 5 has no learned behavior to run.
Tasks involving heavy items held in the grippers: The 55 kg rating belongs to the lift column. Each arm is rated for 1.5 kg, which limits handling to light household objects.
Buyers who need warranty terms and a support record: Y Combinator lists Nori Robotics as founded in 2026 with five people, and the order page states no warranty or return terms.

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.

Nori A3

Daily: Recharge the battery, which Nori rates for 6 to 8 hours of operation.
As needed: Record new demonstrations in Nori Lab to add or retrain a task.
As needed: Restart work after the thermal interlock disables the motor bus at 59°C.
As needed: Replace broken parts using the replacement CAD Nori supplies.
As needed: Take backend policy updates, which reach deployed units without a hardware change.
As needed: Clean the lidar window and four camera lenses when perception inputs look obstructed.

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 0-40 °C range Zeroth lists.

05 Evidence

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.

Evidence behind each classification
Robot	Evidence status	Sources reviewed	Last assessed
Nori A3	Not Consumer-Ready	8	Sep 2026
Zeroth Bridge	Pre-Release	6	Sep 2026