PR1 vs ZALA 421-12
Side-by-side comparison of PR1 (Stanford Personal Robotics Program) and ZALA 421-12 (ZALA Aero) — 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
- PR1United States
- ZALA 421-12Russia
Year First Available
- PR12008
- ZALA 421-122015
Verified Deployments
- PR10 Deployments
- ZALA 421-120 Deployments
Layer 2: Operational
Price
- PR1$50,000 USD
- ZALA 421-12Research platform
Battery / Shift Runtime
- PR12 hrs
- ZALA 421-127 hrs
Availability Status
- PR1ACTIVE
- ZALA 421-12ACTIVE
Layer 3: Category Specific
Payload Capacity
- PR125 kg
- ZALA 421-125 kg
Reach
- PR11,831 mm
- ZALA 421-12—
Max Speed
- PR10.8 m/s
- ZALA 421-1230.6 m/s
Autonomy Level
- PR1semi-autonomous
- ZALA 421-12—
| ||
|---|---|---|
| Layer 1: Identity & Trust | ||
| Manufacturer Country (values differ) | United States | Russia |
| Year First Available (values differ) | 2008 | 2015 |
| Verified Deployments | 0 Deployments | 0 Deployments |
| Layer 2: Operational | ||
| Price (values differ) | $50,000 USD | Research platform |
| Battery / Shift Runtime (priority for Home & Household buyers) (values differ) | 2 hrs | 7 hrs |
| Availability Status | ACTIVE | ACTIVE |
| Layer 3: Category Specific | ||
| Payload Capacity (values differ) | 25 kg | 5 kg |
| Reach (values differ) | 1,831 mm | — |
| Max Speed (values differ) | 0.8 m/s | 30.6 m/s |
| Autonomy Level (values differ) | semi-autonomous | — |
Insufficient data for full comparison
The following fields had no data for any of the selected robots: IP Rating
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 | PR1 | ZALA 421-12 |
|---|---|---|
| Investment | $50,000 | No price |
| Payback period | 12.0 mo | — |
| Net savings (5 yr) | $200,000 | — |
| ROI (5 yr) | +400% | — |
ZALA 421-12 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 PR1 and ZALA 421-12?
PR1 is made by Stanford Personal Robotics Program, based in US. ZALA 421-12 is made by ZALA Aero, based in RU.
When were PR1 and ZALA 421-12 launched?
PR1 launched in 2008. ZALA 421-12 launched in 2015.
How do PR1 and ZALA 421-12 compare on the Robo Index?
PR1 grades AA on the Robo Index. ZALA 421-12 grades BB. 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.
Are PR1 and ZALA 421-12 in the same category?
Both robots are classified as Research on Robolist. Filters and ranking treat them as direct alternatives.
What is the realistic total cost of ownership for Research robots?
Hardware cost is one input. Research TCO also includes integration, training, downtime, and end-of-life. Our breakdown: The real cost of a research platform.
What should a buyer ask vendors when choosing between PR1 and ZALA 421-12?
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 research-robot procurement RFP: questions and red flags.
Going deeper — picking the right robot
The real cost of a research platform
7 min readResearch & Lab Robots
The research-robot procurement RFP: questions and red flags
11 min readResearch & Lab Robots
A 90-day playbook to stand up a new platform in a lab
8 min readResearch & Lab Robots
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
PR1 vs ZALA 421-12 compares two robots in the research 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.