DEPLOYDatabase

Robot model

Memo

Sunday is a Mountain View-based AI robotics startup building Memo, an autonomous wheeled humanoid home robot.

Track Memo
Manufacturer
Sunday
Form factor
humanoid
Maturity
prototype
Lifecycle
active

The verified answer

As of Aug 2026, DEPLOY verifies Memo, a humanoid by Sunday (prototype). 1 source back the record.

Overview

Sunday is a Mountain View-based AI robotics startup building Memo, an autonomous wheeled humanoid home robot. Founded in 2023 by Stanford PhDs Tony Zhao and Cheng Chi, the company emerged from stealth in November 2025 with 5M in seed funding from Benchmark and Conviction, and subsequently raised a 65M Series B at a .15B valuation in March 2026.

Memo is designed to learn household tasks autonomously using Sunday's ACT-1 foundation model, trained on zero robot data. A Founding Family Beta of 50 households is planned for late 2026.

Verified vs. claimed

Maturity stage
prototype(Demo-capable; limited or one-off public appearances.)
Sources on file
View all sources →

No verified deployments on file. DEPLOY tracks independently-sourced deployment evidence separately from manufacturer capability claims.

Key facts

Funding

$165M Series B (Mar 2026, Coatue-led, $1.15B valuation)

CEO

Tony Zhao

Co-founder

Cheng Chi

Total funding

00M (5M seed + 65M Series B)

Valuation

.15B (Series B, March 2026)

Key investors

Benchmark, Conviction

ACT-1

frontier foundation model trained on zero robot data

Beta

50 households, late 2026

Data & sources

Web sources

1

1 source backing this record.View all →

Pricing

No verified price is on record for Memo. Physical-AI systems are often sold through enterprise contracts or operated as a service rather than at a public list price.

How DEPLOY tracks pricing

Memo on the deployment map

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Where Memo is verified operating. Explore the deployment map by place and type.

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Recent activity

Every change to this record is dated, sourced, and independently verified where marked.

Full change history →

Safety record

No incidents on record for Memo.

Only active incidents are counted. Retracted incidents are excluded from this summary but remain reachable at their canonical URLs.

Sources (1)

  1. https://www.globenewswire.com/news-release/2026/3/12/3254877/0/en/sunday-raises-165m-to-launch-first-autonomous-robots-by-thanksgiving.html

Common questions

What is Memo?
Sunday is a Mountain View-based AI robotics startup building Memo, an autonomous wheeled humanoid home robot. Founded in 2023 by Stanford PhDs Tony Zhao and Cheng Chi, the company emerged from stealth in November 2025 with 5M in seed funding from Benchmark and Conviction, and subsequently raised a 65M Series B at a .15B valuation in March 2026. Memo is designed to learn household tasks autonomously using Sunday's ACT-1 foundation model, trained on zero robot data. A Founding Family Beta of 50 households is planned for late 2026.
How much does Memo cost?
Memo's price is not publicly disclosed. DEPLOY has no verified price on record for Memo from Sunday. Physical-AI systems like this are often sold through enterprise contracts or operated as a service rather than at a public list price; check the manufacturer for the latest.
Is Memo actually deployed in the real world?
Memo is at the prototype stage: it exists, but DEPLOY has no verified real-world deployment on record. Manufacturer capability claims should be read as claims pending independent verification.
Who makes Memo?
Memo is made by Sunday, based in Mountain View, CA, USA, founded in 2023.
Can you buy Memo?
Memo is at prototype stage and is not yet available for sale.
What are alternatives to Memo?
On the DEPLOY registry, comparable humanoid robots to Memo include Walker S2, Digit, Unitree G1, Apollo.
How does Memo compare to Walker S2?
Memo and Walker S2 (UBTech Robotics · 17 deployments) are both humanoid robots on the DEPLOY registry. Memo has 0 verified deployments on record. Compare both records for specs, safety, deployments, and verified-vs-claimed autonomy.
Is Memo a top humanoid?
On DEPLOY's intelligence score, which blends verified deployments, safety, adoption, media, and IP signals, Memo ranks in roughly the top under 1% of humanoid models tracked by the registry.
What is Memo's maturity stage?
Memo is at the prototype stage on the DEPLOY maturity ladder (research, prototype, pilot, commercial, production). Prototype stage means demonstrations exist but commercial readiness is not yet established.
Where is Memo deployed?
No verified deployments of Memo are currently on the DEPLOY registry. DEPLOY records deployments only when verified at a named site with a primary source; absence may reflect pre-deployment, research, or manufacturer-internal use.
Is Memo safe?
Memo has no incidents on record in the DEPLOY registry. This does not constitute a safety guarantee; it reflects the incidents DEPLOY has tracked and verified to date.
Methodology: Verified · 1 source (no primary) · last reviewed 2026-07-08

Verification posture

Verified

Low confidence

Review state

Stable

Last reviewed 2026-07-08

Maturity + lifecycle

Maturity stage: prototype

Lifecycle: active

Architectural position

Cohort: humanoid

Sources by quality tier

1
unclassified
Unclassified source

The framework is documented at /methodology. Corrections at /corrections. Reviewer: DEPLOY editorial team.

Methodology surface for Memo.

Recent coverage

Memo in third-party press

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