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US AI home-robot startup Sunday hits $1.2b on $165m series B

Sunday, a Mountain View-based AI robotics startup, raised US$165 million in a series B round at a US$1.2 billion valuation to move from demos to home deployment of its robot, Memo.

Coatue led the round and Thomas Laffont will join the board.

Other backers named include Bain Capital Ventures, Fidelity Management & Research Company, and Tiger Global.

Sunday plans Beta deliveries to homes in just months to collect real-world data before scaling.

The company built a Skill Capture Glove and a data pipeline that it says produces tens of millions of movement episodes to speed model iteration.

Since emerging from stealth in November, Sunday has received thousands of Beta applications and has expanded engineering and research headcount multiple-fold.

The funding will support deployment and hiring as the company prepares to scale to more households.

🧠 Food for thought

Implications, context, and why it matters.

Simple hardware runs on a fresh approach to training examples

  • Sunday’s Memo robot skips humanoid legs and uses a wheeled base for stability, matching its “pragmatic engineering” view 1.
  • Sunday records chore motions with its Skill Capture Glove plus a collection pipeline, which the company says yields tens of millions of movement episodes for faster model iteration 2.
  • Investor Sarah Guo says this tackles a “chicken-and-egg problem” in robotics, since few deployed robots means too little real-world data to build capable robots 3.
  • The method builds on the founders’ Stanford work on low-cost teleoperation systems (ALOHA) and data collection frameworks (UMI) 4.

Exclusive home data may decide who pulls ahead

  • Sunday’s model treats the unique collection pipeline as the lasting edge, not only hardware or AI models; investor Eric Vishria says the field has “about one-millionth of the data we need” 4.
  • New funding supports a feedback loop where beta units collect more in-home recordings, which improves skills and lifts demand for more deployments.
  • If it works, Memo could become a central home platform similar to an iPhone, where abilities like laundry folding or cooking arrive through software updates 3.
  • The plan could also form a new labor market that pays people to perform and record chores at home, turning everyday tasks into training material for AI 2.

🔗 Source: Sunday

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