Company
Sunday
Sunday is a Mountain View-based AI robotics startup building Memo, an autonomous wheeled humanoid home robot.
- Founded
- 2023
- HQ
- Mountain View, CA, USA
Funding
$200.0M
Models
1
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 record
- Verified deployments
- None on file
- Active incidents
- None on file
DEPLOY Intelligence
Market intelligence for physical AI
Analyst-grade signals, competitive tracking, and investment context across the global physical AI landscape. Launching 2026.
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 →
Models (1)
View all models →Sunday on the deployment map
Where Sunday's robots are verified operating. Explore the deployment map by place and type.
Relationships
Current leadership (2)
Founders (2)
Safety record
No incidents on record for Sunday.
Only active incidents are counted. Retracted incidents are excluded from this summary but remain reachable at their canonical URLs.
Full safety record: incidents, sourcing, and exposure data →
Recent coverage
Sunday in third-party press
Peer companies
- Unitree Robotics9 models
- AgiBot5 models
- Boston Dynamics5 models
- UBTech Robotics5 models
- 1X Technologies4 models
- Fourier Intelligence4 models
Financial state
- Reporting basis
- private_reported
- Lifecycle stage
- early
- Counterparty risk class
- moderate
Each numeric field carries its own basis marker. Aggregators report a number; this surface preserves the source class so verification depth travels with the value.
Funding rounds (2)
- Series B2026-03-12
$165M(reported) · $1.1B post
- Seed2025-11-19
$35M(reported)
Investors: Benchmark, Conviction
Sources (1)
Common questions
- What is Sunday?
- 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.
- What does Sunday make?
- Sunday has 1 robot model on the DEPLOY registry: Memo (Sunday builds physical robots).
- Who competes with Sunday?
- On the DEPLOY registry, peer companies to Sunday building in the same form factors include Unitree Robotics, AgiBot, Boston Dynamics, UBTech Robotics.
- Where is Sunday headquartered?
- Sunday is headquartered in Mountain View, CA, USA.
- How much funding has Sunday raised?
- Sunday has raised approximately $200M in disclosed funding on record in the DEPLOY registry.
- Where does Sunday operate robots?
- Sunday is a robot manufacturer and does not directly operate deployments on the DEPLOY registry. Its products are deployed by customer operators; see the company page for the verified deployment record.
- Is Sunday a top robotics company?
- On DEPLOY's intelligence score, which blends verified deployments, funding, hiring, media, safety, and IP signals, Sunday ranks in roughly the top 3% of companies tracked by the registry.
- When was Sunday founded?
- Sunday was founded in 2023.
- Is Sunday safe?
- Sunday 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
Sources by quality tier
- 1
- unclassified
- Unclassified source
The framework is documented at /methodology. Corrections at /corrections. Reviewer: DEPLOY editorial team.
Methodology surface for Sunday.Peer companies
- Unitree Robotics9 models
- AgiBot5 models
- Boston Dynamics5 models
- UBTech Robotics5 models
- 1X Technologies4 models
- Fourier Intelligence4 models
In the press
Recent coverage mentioning Sunday from third-party publications. Automatically surfaced; not part of the verified registry record.
Seres Group expects H1 2026 net loss of $220 million–$270 million
Seres Group on Sunday issued a profit warning for the first half of 2026, forecasting a net loss attributable to shareholders of between RMB 1.5 billion ($220 million) and RMB 1.8…
The fight against AI data centers is just beginning
This is The Stepback, a weekly newsletter breaking down one essential story from the tech world. For more on the data center buildout, follow Emma Roth. The Stepback arrives in…
Tesla driver caught asleep at 100 km/h — how monitoring failed
A Tesla driver was filmed apparently fast asleep behind the wheel at about 100 km/h on British Columbia’s Trans-Canada Highway on Sunday, with two sleeping children in the car.…
SpaceX Falcon 9 launches 29 Starlink satellites and BESXAR’s Flight 1 from Florida 🚀
On Sunday, July 5 at 6:50 a.m. ET, Falcon 9 launched 29 Starlink satellites to low-Earth orbit from Space Launch Complex 40 (SLC-40) at Cape Canaveral Space Force Station in…
Netanyahu says some Lebanese villages ‘asked to be annexed to Israel’
Israeli Prime Minister Benjamin Netanyahu said on Sunday that some Christian villages in southern Lebanon had “asked to be annexed to Israel” so that they could be protected from…
Venezuela leader vows ‘no social unrest’ as quakes death toll passes 3,300
Venezuela’s interim president said on Sunday the country would not descend into social unrest after the twin earthquakes which killed more than 3,300 people and left thousands…
Millions in Lalique jewellery stolen in daring French museum raid
Burglars stole millions of euros’ worth of jewellery from the museum of French luxury glassmaker Lalique in a daring early-morning raid on Sunday, just months after a stunning gem…
White supremacist group’s July 4 march counts as free speech, US interior secretary says
Federal officials had no reason to stop a white supremacist group’s July 4 rally in Washington because of free speech protections, US Interior Secretary Doug Burgum said on…
UK’s Nigel Farage faces new allegations over gifts
Hard-right British politician Nigel Farage on Sunday faced fresh allegations over non-disclosure of gifts after a newspaper reported a convicted fraudster paid for his security…
German govt may withhold classified info from states if far-right start winning
German Defence Minister Boris Pistorius said Sunday that the federal government is considering withholding information from ministers in state administrations if they are formed…
Fires ravage France, Spain, Portugal forests as Europe’s temperatures rise again
Hundreds of firefighters battled forest infernos in France, Spain and Portugal on Sunday as temperatures rose again in heatwave-scarred Europe. The latest wildfires have already…
Vance hopes Burnham delivers ‘structural change’ amid ‘broken’ UK politics
US Vice-President J.D. Vance said Britain had been “failed by its leadership for a long time”, adding that he hoped the country’s next prime minister could deliver the…
Machine-readable surfaces
- Markdown mirror: /companies/sunday.md
- RSS feed: /companies/sunday/feed.xml
- JSON-LD: embedded in this page’s head
- REST API: /v1/companies/5a89f9c4-efba-4fca-b0ed-934d9986c26c
- Revision history: /companies/sunday/history
- Data documentation: /data
- Query this programmatically: Deploy MCP
Peer companies
- Unitree Robotics9 models
- AgiBot5 models
- Boston Dynamics5 models
- UBTech Robotics5 models
- 1X Technologies4 models
- Fourier Intelligence4 models
Video
I visited @SundayRobotics to see how they're building a household robot that actually works in real homes. Founded by Stanford roboticists Tony Zhao and Cheng
Memo is a personal robot, built for busy households. It works 24/7 to make your life lighter, so you can focus on what really matters. Our beta launches late 20
Introducing ACT-1, a frontier robot foundation model trained with zero robot data Website: https://www.sunday.ai/ X: https://x.com/SundayRobotics
The story behind the Sunday team Website: https://www.sunday.ai/ X: https://x.com/SundayRobotics
We’re moving beyond demos to focus on real-world deployment of our robot, Memo. Our public beta rolls out to users this Fall. See more at: Website: https://www
1,709 → 72,000 sq. ft. in two years To bring Memo into your home, we had to expand our own. Welcome to Memo's New Home. See more at: Website: https://www.sun
Quick breakdown of Sunday Robotics’ Memo — why its look reads as cute, harmless, and approachable. Short, factual explainer for casual viewers and new robot en
Tony Zhao is the co-founder and CEO of Sunday, the helpful robotics company building humanoid, Memo, that is powered by state-of-the-art AI models and an ever-e
Reality vs attention
Sunday draws attention at the 85th percentile but verifies reality at the insufficient-data level among humanoids.
6-month trend
Analysis
Well-capitalized with $200M raised and recent funding activity. Meaningful press and media coverage across the period.
Signal flags
Dimension breakdown
Verified signal
Attention (reach, not merit)
DEPLOY Intelligence scores are computed from verified registry data: confirmed deployments, disclosed funding rounds, regulatory filings, active job listings, video viewership, and press coverage. Confidence ratings reflect data availability. Scores update nightly.
DEPLOY Indices — verified vs claimed
Last computed: Jul 14, 2026