Robotnik RB-KAIROS vs Stretch 3
Side-by-side comparison of Robotnik RB-KAIROS (Robotnik) and Stretch 3 (Hello Robot) — specs, pricing, Robo Score, 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
- Robotnik RB-KAIROSSpain
- Stretch 3United States
Verified Deployments
- Robotnik RB-KAIROS0 Deployments
- Stretch 30 Deployments
Layer 2: Operational
Price
- Robotnik RB-KAIROS$50,000 USD
- Stretch 3$24,950 USD
Battery / Shift Runtime
- Robotnik RB-KAIROS6 hrs
- Stretch 32.5 hrs
Availability Status
- Robotnik RB-KAIROSACTIVE
- Stretch 3ACTIVE
Layer 3: Category Specific
Payload Capacity
- Robotnik RB-KAIROS5 kg
- Stretch 32 kg
Reach
- Robotnik RB-KAIROS850 mm
- Stretch 3—
Max Speed
- Robotnik RB-KAIROS1.5 m/s
- Stretch 3—
| | |
|---|---|---|
| Layer 1: Identity & Trust | ||
| Manufacturer Country (values differ) | Spain | United States |
| Verified Deployments | 0 Deployments | 0 Deployments |
| Layer 2: Operational | ||
| Price (values differ) | $50,000 USD | $24,950 USD |
| Battery / Shift Runtime (priority for Home & Household buyers) (values differ) | 6 hrs | 2.5 hrs |
| Availability Status | ACTIVE | ACTIVE |
| Layer 3: Category Specific | ||
| Payload Capacity (values differ) | 5 kg | 2 kg |
| Reach (values differ) | 850 mm | — |
| Max Speed (values differ) | 1.5 m/s | — |
Insufficient data for full comparison
The following fields had no data for any of the selected robots: Year First Available, 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 | Robotnik RB-KAIROS | Stretch 3 |
|---|---|---|
| Investment | $50,000 | $24,950 |
| Payback period | 12.0 mo | 6.0 mo |
| Net savings (5 yr) | $200,000 | $225,050 |
| ROI (5 yr) | +400% | +902% |
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 Robotnik RB-KAIROS and Stretch 3?
Robotnik RB-KAIROS is made by Robotnik, based in ES. Stretch 3 is made by Hello Robot, based in US.
How much does Robotnik RB-KAIROS cost compared to Stretch 3?
Robotnik RB-KAIROS is listed at $50,000. Stretch 3 is listed at $24,950.
How do Robotnik RB-KAIROS and Stretch 3 compare on the Robo Score?
Robotnik RB-KAIROS scores 57.4 on the Robo Score. Stretch 3 scores 45.9. The Robo Score is a 0–100 credibility figure blending commercial maturity, verified deployments, company standing, and independent coverage — see methodology for the full breakdown.
What is the payload difference between Robotnik RB-KAIROS and Stretch 3?
Robotnik RB-KAIROS carries up to 5 kg. Stretch 3 carries up to 2 kg.
Are Robotnik RB-KAIROS 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 Robotnik RB-KAIROS 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
Robotnik RB-KAIROS 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 Score is calculated.