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Joby S4 vs SkyDrive SD-05

Key facts

Joby S4 (Joby Aviation; Pilot) and SkyDrive SD-05 (SkyDrive Inc.; Prototype) are both eVTOL air taxis. Published figures: top speed 322 km/h vs 110 km/h; passengers 4 persons vs 2 persons. Published for only one of them: weight (SkyDrive SD-05: 1,400 kg (3,086 lb)); range (SkyDrive SD-05: 15–40 km). Neither maker has published a price. Robot 500: Joby S4 #88 (score 55.5), SkyDrive SD-05 #130 (score 46.4). Disclosure: Joby S4 has 10 sourced values (50% of tracked fields), SkyDrive SD-05 has 13 (65%).

Cite: RankedRobot, https://rankedrobot.com/compare/joby-s4-vs-skydrive-sd-05/ (checked 2026-09-25) · Every figure below links to its source · Joby S4 spec sheet · SkyDrive SD-05 spec sheet

SpecJoby S4SkyDrive SD-05
StatusPilotPrototype
PriceNot publishedNot published
Robot 500#88 · 55.5#130 · 46.4
Launch
Announced
Not disclosedNot disclosed
Not disclosedNot disclosed
Status
PilotManufacturerSource: jobyaviation.com (2026-09-25)
PrototypeManufacturerSource: skydrive.co.jp (2026-09-25)
Body
Dimensions
Not disclosedNot disclosed
Length 12,100 mm × Width 11,400 mm × Height 3,000 mmManufacturerSource: skydrive.co.jp (2026-09-25)
Weight
Not disclosedNot disclosed
1,400 kg (3,086 lb)ManufacturerSource: skydrive.co.jp (2026-09-25)
Aircraft
Passengers
4 personsManufacturerSource: jobyaviation.com (2026-09-25)
2 personsManufacturerSource: skydrive.co.jp (2026-09-25)
Range
Not disclosedNot disclosed
15–40 kmManufacturerSource: skydrive.co.jp (2026-09-25)
Cruise speed
Not disclosedNot disclosed
Not disclosedNot disclosed
Top speed
322 km/hManufacturerSource: jobyaviation.com (2026-09-25)
110 km/hManufacturerSource: skydrive.co.jp (2026-09-25)
Max take-off weight
2,400 kg (5,291 lb)ManufacturerSource: jobyaviation.com (2026-09-25)
1,400 kg (3,086 lb)ManufacturerSource: skydrive.co.jp (2026-09-25)
Payload
Not disclosedNot disclosed
Not disclosedNot disclosed
Piloting
PilotedManufacturerSource: jobyaviation.com (2026-09-25)
PilotedManufacturerSource: skydrive.co.jp (2026-09-25)
Propulsion
6 electric tilt-propeller units with 5 blades eachManufacturerSource: jobyaviation.com (2026-09-25)
12 main motors, each attached to one rotor (multicopter)ManufacturerSource: skydrive.co.jp (2026-09-25)
Certification
Not disclosedNot disclosed
Not disclosedNot disclosed
Flight time
Not disclosedNot disclosed
Not disclosedNot disclosed
Power
Battery
Not disclosedNot disclosed
Not disclosedNot disclosed
Safety
Certifications
Not disclosedNot disclosed
Not disclosedNot disclosed

Confidence labels: Manufacturer = stated by the maker · Verified = independently confirmed · Reported = credible media or retailer, not confirmed by the maker · ⚠ Unconfirmed = leak or single source · Not disclosed = not published. We never estimate missing figures. Add more robots to this comparison.

Quick answers

What is the difference between the Joby S4 and the SkyDrive SD-05?

Published figures: top speed 322 km/h vs 110 km/h; passengers 4 persons vs 2 persons. Published for only one of them: weight (SkyDrive SD-05: 1,400 kg (3,086 lb)); range (SkyDrive SD-05: 15–40 km).

Which is cheaper, the Joby S4 or the SkyDrive SD-05?

Neither maker has published a price. Prices are shown exactly as published, never converted or estimated.

Which ranks higher in the Robot 500, the Joby S4 or the SkyDrive SD-05?

Robot 500: Joby S4 #88 (score 55.5), SkyDrive SD-05 #130 (score 46.4). Method: https://rankedrobot.com/robot500/#method

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