RB-Y1 vs Stretch 3
Side-by-side comparison of RB-Y1 (Rainbow Robotics Co., Ltd.) and Stretch 3 (Hello Robot) — specs, pricing, Robo Index, and verified deployments. Updated daily.
Optimize comparison for buyer
Optimized for Home & Household buyers. Priority specs lifted to the top and marked with a target.
Layer 1: Identity & Trust
Manufacturer Country
- RB-Y1South Korea
- Stretch 3United States
Verified Deployments
- RB-Y10 Deployments
- Stretch 30 Deployments
Layer 2: Operational
Price
- RB-Y1Contact for quote
- Stretch 3$24,950 USD
Battery / Shift Runtime
- RB-Y1—
- Stretch 32.5 hrs
Availability Status
- RB-Y1ACTIVE
- Stretch 3ACTIVE
Layer 3: Category Specific
Payload Capacity
- RB-Y13 kg
- Stretch 32 kg
| ||
|---|---|---|
| Layer 1: Identity & Trust | ||
| Manufacturer Country (values differ) | South Korea | United States |
| Verified Deployments | 0 Deployments | 0 Deployments |
| Layer 2: Operational | ||
| Price (values differ) | Contact for quote | $24,950 USD |
| Battery / Shift Runtime (priority for Home & Household buyers) (values differ) | — | 2.5 hrs |
| Availability Status | ACTIVE | ACTIVE |
| Layer 3: Category Specific | ||
| Payload Capacity (values differ) | 3 kg | 2 kg |
Insufficient data for full comparison
The following fields had no data for any of the selected robots: Year First Available, Reach, Max Speed, IP Rating, Autonomy Level
ROI Comparison
Same operating assumptions across every robot — the only difference is price. Set your numbers once to see which pays back fastest.
Annual labor displaced (per robot): $50,000
| Metric | RB-Y1 | Stretch 3 |
|---|---|---|
| Investment | No price | $24,950 |
| Payback period | — | 6.0 mo |
| Net savings (5 yr) | — | $225,050 |
| ROI (5 yr) | — | +902% |
RB-Y1 has no listed price, so payback can't be computed. Contact the manufacturer for a quote.
Estimates labor-cost displacement only — not a full total cost of ownership. Actual ROI depends on integration, maintenance, training, downtime, and task fit. Converted currencies are indicative; USD is the price of record.
Trade-offs at a glance
Frequently asked
Who makes RB-Y1 and Stretch 3?
RB-Y1 is made by Rainbow Robotics Co., Ltd., based in KR. Stretch 3 is made by Hello Robot, based in US.
How do RB-Y1 and Stretch 3 compare on the Robo Index?
RB-Y1 grades AA on the Robo Index. Stretch 3 grades BBB. The Robo Index is a credibility grade (AAA … C) that blends commercial maturity, verified deployments, company standing, and independent coverage — see methodology for the full breakdown.
What is the payload difference between RB-Y1 and Stretch 3?
RB-Y1 carries up to 3 kg. Stretch 3 carries up to 2 kg.
Are RB-Y1 and Stretch 3 in the same category?
Both robots are classified as Mobile Manipulator on Robolist. Filters and ranking treat them as direct alternatives.
What should a buyer ask vendors when choosing between RB-Y1 and Stretch 3?
Spec sheets only show part of the story. Useful vendor questions cover support, lifecycle, integration cost, and references. We have a buyer-focused checklist: The mobile manipulator vendor RFP: questions and red flags.
Going deeper — picking the right robot
The mobile manipulator vendor RFP: questions and red flags
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A 90-day playbook for your first mobile manipulation task
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Decision framework: mobile manipulator vs fixed arm vs AMR + manual
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Build vs buy vs lease: which model fits a first deployment
8 min readChoosing Your First Robot
The hidden specs vendors hope you'll miss
10 min readReading the Spec Sheet
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About this comparison
RB-Y1 vs Stretch 3 compares two robots in the mobile-manipulator category. All data is sourced from manufacturer spec sheets, verified deployments, and third-party filings; see our methodology for how the Robo Index is calculated.