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.

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Robotnik RB-KAIROS57.4

Stretch 345.9

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—

	Robotnik RB-KAIROSmobile-manipulatorRobotnik 57.4Robo Score	Stretch 3mobile-manipulatorHello Robot 45.9Robo Score
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 (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

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ROI Comparison

Same operating assumptions across every robot — the only difference is price. Set your numbers once to see which pays back fastest.

Robots (fleet)

Hours / day

Labor $/hr (USD)

Days / year

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.

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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.