JAXA / Mitsubishi Heavy Industries · Japan
Arianespace / ArianeGroup · Europe
| H3 | Metric | Ariane 6 |
|---|---|---|
| 16,500 kg | Payload to LEO | +31%21,650 kg |
| 6,500 kg | Payload to GTO | +77%11,500 kg |
| 57 m | Height | +9835%56–63 m |
| ~$5,500/kg+36% | Cost per kg | ~$7,500/kg |
| 75% | Success Rate | +33%100% |
| 2024 | First Flight | 2024 |
| No | Reusable | No |
| JAXA / Mitsubishi Heavy Industries | Company | Arianespace / ArianeGroup |
| Japan | Country | Europe |
Payload to Low Earth Orbit (LEO) — relative scale
Payload to Geostationary Transfer Orbit (GTO)
1
H3 wins
2
Tied
4
Ariane 6 wins
Ariane 6 delivers 31% more payload to LEO, making it the heavier lifter.
H3 is more cost-effective at ~$5,500/kg vs ~$7,500/kg.
Ariane 6 has a higher success rate (100% vs 75%), indicating greater flight heritage.
Overall, Ariane 6 wins on more metrics (4 vs 1), though each rocket is designed for different mission profiles.