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The global launch market reached $14.1 billion in 2024 — up 34% since 2021.
| Attribute | |||
|---|---|---|---|
| Company | JAXA / IHI Aerospace | Relativity Space | Interstellar Technologies |
| Country | 🇯🇵 Japan | 🇺🇸 USA | 🇯🇵 Japan |
| Status | Retired | In Development | In Development |
| Vehicle class | Small | Heavy | Small |
| Propellant | Solid (HTPB — all stages) | LOX / methane | Liquid biomethane (LBM) / LOX |
| Reusable | No | Yes | No |
| Stages | 3 | 2 | 2 |
| First flight | 2013 – 2022 | 2026 | 2027 |
| Payload to LEO | 590 kgas of [1]500 kg to SSO. Enhanced Epsilon (from E-4) added 700 kg LEO via PBS liquid kick stage. | 33,500 kg expendable / 23,500 kg with a reusable first stageas of [1]First flight targeted 2026 (stated plan, not yet confirmed flown as of this research). ↑ Best | 250 kgas of [1]500 km SSO. No flight attempts as of this research — follows the company's successful suborbital MOMO sounding-rocket program. A larger orbital vehicle, DECA, was announced January 2023. |
| Payload to GTO | — | — | — |
| Height | 26 mas of [1] | 87 mas of [1] ↑ Best | — |
| Liftoff mass | 96 tas of [1] ↑ Best | — | — |
| Success rate | 83.3%as of [2]5/6 successes. E-6 (Oct 12, 2022) PBS upper stage failed to ignite, eight satellites lost. Epsilon S (next-generation) ground test anomaly Jan 2023 effectively ended the programme. ↑ Best | — | — |
| Total flights | 6as of [2] ↑ Best | — | — |
| Cost / kg LEO | — | ~$55M per launch (estimate)as of [1]Total launch price estimate, not a per-kg figure. ↓ Cheapest | — |
| Summary | JAXA's small solid-fuel rocket derived from the M-V rocket heritage. Designed for highly autonomous operations — launch preparations could be managed by just 8 people. The sixth and final E-6 mission (Oct 2022) failed when the PBS kick stage didn't ignite; a ground explosion during Epsilon S testing (Jan 2023) ended the programme. | Relativity Space's Falcon-9-class successor to Terran 1, partially 3D-printed, with 13 Aeon R methalox engines on a reusable first stage; second stage and fairing expendable. | A liquid-biomethane orbital smallsat launcher from Interstellar Technologies, Japan's most established private rocket startup by suborbital flight heritage, though not yet flown to orbit. |
48 launch vehicles across 10 countries — active, retired, and in development — with primary-source citations from manufacturer user guides and agency press kits. Pure URL state: bookmark or share the link and the comparison reproduces exactly.