Memo by Sunday Robotics: status and timeline

Memo

Wheeled household robot that clears tables, loads dishwashers, folds laundry and makes coffee. Learns from human demonstrations; adds skills monthly.

ProtoStage 2 of 5

Beta late 2026; general availability targeted for end 2026.

Updated 12 Mar 2026Checked 10 Oct0 updates this week

Milestones

Next · Beta deployments in 50 homes

Sunday founded by Tony Zhao and Cheng ChiApr 2024Complete.
Sunday emerges from stealth with $35M Series A19 Nov 2025Complete.
Memo demonstrates dishwashing, laundry folding and espresso making19 Nov 2025Complete.
Series B funding: $165M at $1.15B valuation12 Mar 2026Complete.
Beta deployments in 50 homesTarget Q4 2026Current milestone.
General availability targeting end of 2026Target Q4 2026Not yet reached.

Most important updates

Upcoming

Q4 2026Beta deployments in 50 homes (next)
Q4 2026General availability targeting end of 2026

Current obstacles

Generalizing to unseen environmentsMemo trained in labs; real homes have clutter, lighting changes and unfamiliar objects.
Safety around children and petsMemo must operate safely; detects obstacles and fails safely.
Cost and manufacturing scalePrototypes at $20,000 are above consumer expectations; <$10,000 needs scale.

Physics limits

Deep learning requires massive training dataEach new skill needs sufficient human examples; some tasks are hard to demonstrate safely.
Wheels lose dexterity compared to legsWheeled platforms can't climb stairs or traverse uneven terrain; Memo assumes flat spaces.
Batteries and charging limit run timeMemo must return to charge regularly, limiting continuous operation.

How it works

4 parts

Capture from humans

Skill Capture Gloves record hand motion

Gloves record hand position, finger angles, grip force and speed at high frequency.

Train the policy

Diffusion or transformer learns the motion

Memo's model learns to predict arm position and gripper angle from camera view; short demos teach complex tasks.

Execute in the home

Robot runs the learned policy on its camera feed

Memo's cameras see the kitchen, the model predicts arm movements, robot executes them.

Continuous improvement

Monthly updates add new skills

New skills added via software updates without hardware changes.

Spec sheet

Spec	Memo
Height	1.7 m^R (reported)
Weight	77 kg^R (reported)
Degrees of freedom	20+ (7 per arm, 4 in base, fingers)^R (reported)
Horizontal arm reach	0.8 m^R (reported)
Vertical arm reach	2.1 m^R (reported)
Maximum movement speed	1 m/s^R (reported)
Prototype manufacturing cost	~$20,000^R (reported)
Target cost at scale	<$10,000^E (estimated)

^R reported by the company · ^E our estimate

Papers & demos

2 items

2023paper
Learning Fine-Grained Bimanual Manipulation with Low-Cost Hardware (opens arxiv.org)Founded the imitation learning approach Sunday uses for learning from demonstrations.
2023paper
Diffusion Policy: Visuomotor Policy Learning via Action Diffusion (opens diffusion-policy.cs.columbia.edu)Alternative policy learning method using diffusion models; complements ALOHA for learning high-dimensional action sequences.

Update log

3 updates

Thu 12 Mar

Major: Sunday raises $165M Series B at $1.15B valuation from Coatue, enters unicorn status four months after Series APressFunding

Wed 19 Nov 2025

Major: Memo demonstrates dishwashing, sock folding and espresso makingPressHardware
Major: Sunday Robotics emerges from stealth with $35M Series A to launch Memo household robotPressHardware

About Sunday Robotics

The team behind Memo

Sunday Robotics

Memo home robot, household chores, imitation learning

Sunday is a Mountain View robotics startup founded by Stanford researchers Tony Zhao and Cheng Chi, developing Memo, a household robot trained on human demonstrations. $165M Series B at $1.15B (March 2026).

Series A ($35M) November 2025; Series B ($165M) March 2026 at $1.15B valuation from Coatue.
Memo: 1.7m tall, 77 kg, 20+ degrees of freedom. Wheeled, not legged, for stable family use.
Learns from human demonstrations via Skill Capture Gloves; low-cost imitation learning at scale.

sunday.ai (opens sunday.ai)Company profile →

Founded: 20242 yrs
Headquarters: United States
Status: Private
Valuation: $1.1BprivateMar 2026
Raised: $200M2 rounds
Last round: Series B · $165MMar 2026
Works in: RoboticsHome robots
Coverage: 1 program · 3 updateslatest 12 Mar 2026checked 10 Oct
Lead investors: Coatue ManagementBenchmarkConviction Partners
Investors: Benchmark (opens benchmark.com)Conviction Partners (opens convictionpartners.com)Coatue Management (opens coatue.com)Tiger Global (opens tiger-global.com)Bain Capital Ventures (opens baincapitalventures.com)
People: Tony Zhao (opens tonyzhaozh.github.io)Co-founder & CEOCheng Chi (opens linkedin.com)Co-founder & CTO

Spec

Memo

Height

1.7 m^R (reported)

Weight

77 kg^R (reported)

Degrees of freedom

20+ (7 per arm, 4 in base, fingers)^R (reported)

Horizontal arm reach

0.8 m^R (reported)

Vertical arm reach

2.1 m^R (reported)

Maximum movement speed

1 m/s^R (reported)

Prototype manufacturing cost

~$20,000^R (reported)

Target cost at scale

<$10,000^E (estimated)