Sunday Robotics

What the company builds

Sunday Robotics, which brands itself simply as Sunday and operates at sunday.ai, is a Mountain View, California company building Memo, an autonomous home robot aimed at domestic chores: clearing tables, loading dishwashers, folding laundry and making coffee. Memo is deliberately not a biped. It rides on a wheeled base with a low centre of gravity and uses a telescoping vertical spine to change working height, standing about 1.7 metres and weighing roughly 170 lbs, with a quoted four-hour runtime. Its end effector is a custom dual gripper rather than a five-fingered hand — a departure from the anthropomorphic hardware pursued by Tesla and Figure. Memo is not yet for sale; the company says it will not be purchasable until beta testing concludes.

The data argument

Sunday's distinguishing bet is on how the robot is trained rather than on the robot itself. Instead of in-home teleoperation, the company collects demonstrations from people wearing its Skill Capture Glove — a wearable descended from co-founder Cheng Chi's UMI work — with data gatherers the company calls Memory Developers. At its stealth exit in November 2025, Sunday said Memo had been trained on roughly 10 million real-world household episodes from more than 500 homes, feeding a foundation model, ACT-1, that it described as trained on "zero robot data."

In July 2026 the company previewed a successor, ACT-2, reporting 778 successful autonomous laundry folds out of 785 attempts — 99.1% — across unseen homes and nine garment types, with a mean fold quality of 4.72 out of 5 and no home- or garment-specific adaptation. Sunday proposed a "solve" as an alternative to demo-based reporting: reliability within a declared scope at a stated adaptation cost. The evaluation is first-party and has not been independently audited.

Funding and deployment

Sunday emerged from stealth on 19 November 2025 backed by $35 million from Benchmark and Conviction, with a team the company then put at 25 engineers and researchers. On 12 March 2026 it announced an oversubscribed $165 million Series B at a $1.15 billion valuation, led by Coatue with Thomas Laffont taking a board seat, alongside Bain Capital Ventures, Fidelity Management & Research Company, Tiger Global, Benchmark, Conviction and Xtal Ventures. CEO Tony Zhao framed the round as the end of the company's demo phase, with beta deliveries starting within months.

Commercial traction remains pre-revenue. The Founding Family Beta is to place individually numbered units in about 50 households in late 2026. Hand-building a single Memo currently costs around $20,000, with the company targeting under $10,000 at scale.

Where it sits

Sunday occupies the wheeled, appliance-shaped end of the home-robot field, against bipedal entrants such as 1X and Figure. Its recruitment of senior Tesla Autopilot and Optimus engineers after coming out of stealth, and its public exchanges with Figure over dishwasher demonstrations, have kept it visible well beyond its headcount. The open question is execution: whether beta hardware reaches homes on the stated timeline, and whether laboratory-grade reliability figures survive contact with 50 unsupervised households.