Overview
Memo is the home robot from Sunday (Sunday Inc., brand Sunday Robotics), a US startup that exited stealth in November 2025. Rather than a biped, Memo is a wheeled robot with two arms and a telescoping spine, designed for everyday household chores. Its headline feature is the in-house ACT-1 model.
Tech specs
| Spec | Value |
|---|---|
| Form factor | Wheeled mobile base, dual arms, telescoping spine, soft cladding |
| Height | 1.7 m (5’7“); rests at ~4 ft; reach to ~2.1 m |
| Weight | 170 lb |
| Payload / lift | Not disclosed |
| Degrees of freedom | Not disclosed |
| End effectors | Two custom dual-gripper / pincer arms (not five-finger hands) |
| Battery | ~4 h runtime; ~1 h to 80% charge |
| Sensors | Vision plus force sensitivity for delicate handling; full suite not disclosed |
| Status | Invite-only beta for ~50 US households planned for late 2026; not commercially available |
Pricing
Sunday has not set a retail price. It states that building one Memo today costs about $20,000 but explicitly says that is not the expected retail price, with pricing to be announced closer to launch. Beta participation is free for selected “Founding Families.”
AI & autonomy
Memo runs ACT-1, Sunday’s in-house robot foundation model, marketed as “trained on zero robot data.” Instead of teleoperated robot trajectories, ACT-1 learns from humans wearing Sunday’s low-cost Skill Capture Gloves (around $200 to make versus ~$20,000 teleop rigs), with motions converted to robot actions via “Skill Transform.” Training drew on roughly 10 million episodes of household routines captured across 500+ US homes.
Deployment & traction
Sunday was founded by Stanford-trained robot-learning researchers Tony Zhao (ALOHA, ACT) and Cheng Chi (Diffusion Policy, UMI). It raised $35M from Benchmark and Conviction at its November 2025 launch, followed by a $165M Series B at a $1.15bn valuation led by Coatue Management in March 2026. A roughly 50-home beta is planned for late 2026.