The Firefly Alpha is a two-stage expendable rocket built by Firefly Aerospace that delivers up to 1,030 kg to Low Earth Orbit (LEO). Operating primarily from Vandenberg Space Force Base, the rocket has flown seven times with a record of three full successes, two failures, and two partial failures. This gives Alpha a full-mission success rate of roughly 43 percent across its first seven flights.
Alpha addresses satellite operators that need dedicated orbital delivery rather than waiting for secondary slots on larger rockets. The rocket returned to flight on 12 March 2026 following a stand-down period of roughly ten months after a failed mission in April 2025.
Technical Design of the Alpha Rocket
Firefly Alpha is a two-stage, liquid-fueled launch vehicle standing 31.7 meters (104 feet) tall with a gross liftoff mass of 54,000 kilograms. Both stages burn propellant combinations of liquid oxygen and RP-1 kerosene, fed by turbopumps using a tap-off engine cycle. The vehicle diameter is 1.82 meters, while the payload fairing measures 2.2 meters in diameter and 5.0 meters in height.
Four Reaver engines power the first stage, producing 801 kilonewtons of vacuum thrust with a vacuum specific impulse of 295.6 seconds. The second stage uses a single Lightning engine, delivering 70.1 kilonewtons of vacuum thrust with a specific impulse of 322 seconds. Tap-off cycles are explained in how rocket engines work to see how tap-off cycles differ from gas-generator or staged-combustion designs.
Firefly claims no reusability for Alpha. The rocket is fully expendable, discarding both the booster core and upper stage during ascent. Firefly lists primary orbital capacities of 1,030 kilograms to a 300-kilometer Low Earth Orbit and 630 kilograms to a 500-kilometer Sun-Synchronous Orbit (SSO). The reference site Wikipedia also lists a capacity of 1,170 kilograms to a 200-kilometer orbit.
The company operates its primary launch pad at Vandenberg Space Force Base using Space Launch Complex 2W (SLC-2W). Firefly documentation also identifies capability for United States east and west coast sites, Sweden’s Esrange Space Center, and a containerized, deployable ground system designed to launch from global locations with seven days of notice.
| Specification | Firefly Alpha Metric |
|---|---|
| Height | 31.7 meters (104 feet) |
| Vehicle Core Diameter | 1.82 meters |
| Fairing Diameter | 2.2 meters |
| Fairing Height | 5.0 meters |
| Liftoff Mass | 54,000 kilograms |
| Stage 1 Propulsion | 4 Reaver engines (801 kN vacuum thrust) |
| Stage 2 Propulsion | 1 Lightning engine (70.1 kN vacuum thrust) |
| Propellants | RP-1 kerosene and liquid oxygen (both stages) |
| Payload to 300 km LEO | 1,030 kilograms |
| Payload to 500 km SSO | 630 kilograms |
| Reusability | Fully expendable |
| Published Base Price | Not published by Firefly Aerospace |
Flight History and Mission Record
Alpha has launched seven times since its orbital debut, recording three full successes, two complete failures, and two partial failures. This outcome split translates to a roughly 43 percent full-success rate. For commercial and defense payload operators considering launch providers, that flight history represents the most critical performance benchmark on record.
The mission record includes a failed launch in April 2025, which led Firefly to pause flight operations for roughly ten months while addressing the vehicle. Following that stand-down period, Alpha returned to flight on 12 March 2026 from its pad at Vandenberg.
Small launch vehicles routinely experience development setbacks during their early flight series, but Alpha’s historical split of 3-2-2 means mission planners must price operational risk into their launch procurement decisions. Firefly’s focus has centered on stabilizing the operational cadence and validating manufacturing standards to ensure consistent orbital delivery.
Alpha Block 2 Upgrades and Schedule
Firefly plans to introduce an upgraded configuration designated Alpha Block II to improve its small-launch baseline. The company has assigned this update to Flight 8, which represents the first flight of the full Block II design.
Flight 8 has a target launch date in the fourth quarter of 2026. Because Firefly has not released engineering modifications or mechanical changes for Block II publicly, customers evaluate the upcoming vehicle strictly through demonstrated flight milestones. Success on Flight 8 would mark Alpha’s second post-stand-down flight and establish whether the Block II configuration provides greater consistency than earlier iterations.
Launch Pricing and Kilogram Economics
Firefly Aerospace publishes no launch pricing on its official Alpha specification pages. Commercial rates for dedicated missions depend on payload mass, custom orbit parameters, and mission integration timelines.
External estimates provide some context for market expectations. The reference entry on Wikipedia reports Alpha’s launch price at $15 million to $17.6 million per flight. In a broader industry assessment, the Canadian trade publication SpaceQ estimated that Rocket Lab’s Electron and Firefly’s Alpha charge between $15,000 and $25,000 per kilogram to Low Earth Orbit. That estimate is SpaceQ’s own projection rather than an official rate published by either launch provider.
Dedicated small launchers carry a significant pricing premium over shared slots on heavy rockets. A standard slot through the SpaceX rideshare program on Falcon 9 costs $350,000 for 50 kilograms to Sun-Synchronous Orbit, with additional mass priced at $7,000 per kilogram. Buying dedicated capacity on an Alpha flight costs millions more in total expenditure, but it delivers direct control over the flight schedule and orbital insertion point.
Firefly Alpha vs Rocket Lab Electron
Alpha competes most directly against the Rocket Lab Electron, which flies far more often. The trade-off between the two rockets comes down to payload capacity versus demonstrated reliability.
Electron is a smaller vehicle, standing 18 meters tall with a 1.2-meter diameter. It uses nine electric-pump-fed Rutherford engines on its first stage to lift 300 kilograms to Low Earth Orbit or 200 kilograms to Sun-Synchronous Orbit. Rocket Lab has completed 97 launches with Electron, recording 93 successes and 4 failures. That total includes nine suborbital test flights conducted for the HASTE hypersonic testing program.
Rocket Lab has recovered an Electron first-stage booster twice from operational flights, but no recovered booster has ever reflown. Electron operates as an expendable rocket in daily practice. In its financial filing with the Securities and Exchange Commission (SEC) for the six months ending 30 June 2026, Rocket Lab reported an average revenue per launch of $9.2 million. Rocket Lab does not publish a standardized public price sheet and notes that this revenue average does not establish fixed per-flight pricing.
Alpha carries more than three times the payload of Electron to Low Earth Orbit (1,030 kilograms compared to 300 kilograms). However, Electron has flown more than ten times as often as Alpha and maintains a substantially higher historical mission success rate.
| Metric | Firefly Alpha | Rocket Lab Electron |
|---|---|---|
| Manufacturer | Firefly Aerospace | Rocket Lab |
| LEO Payload (300 km) | 1,030 kg | 300 kg |
| SSO Payload (500 km) | 630 kg | 200 kg |
| Total Flight Count | 7 flights | 97 flights (including 9 HASTE) |
| Success Record | 3 successes, 2 partial, 2 failures | 93 successes, 4 failures |
| First-Stage Engines | 4 Reaver (tap-off cycle) | 9 Rutherford (electric pump) |
| Operational Status | Active (returned March 2026) | Active |
| Reusability Status | Fully expendable | Expendable (2 recovered, none reflown) |
| Published Price | Not published | Not published ($9.2M average revenue) |
Satellite builders whose instruments weigh between 300 and 1,000 kilograms cannot fit on an Electron, making Alpha an attractive domestic alternative if payload mass exceeds Electron’s lift limit. For payloads under 300 kilograms, Electron offers an extensive operational flight history that Alpha has yet to match. A wider survey of alternative vehicles is detailed in our guide to Falcon 9 alternatives.
Dedicated Small Launchers Versus Shared Rides
The small-satellite sector relies on dedicated light rockets because rideshare flights introduce severe operational compromises. When an operator buys a rideshare slot on a medium or heavy rocket, the primary customer dictates the launch window, the target orbital altitude, and the inclination.
Small satellites deploying via rideshare often spend months using onboard propulsion to drift toward their target orbital planes. A dedicated rocket like Alpha flies directly to the customer’s specified altitude and local time of ascending node, allowing LEO satellites to begin commercial operations immediately.
This scheduling control has grown more important due to shifts in heavy-lift rideshare capacity. Industry reporting indicates that SpaceX has stopped selling new shared Falcon 9 missions beyond late 2028. As shared manifest capacity tightens across the market, dedicated small-lift vehicles face higher demand from commercial constellations and government agencies.
Government procurement leaders have also examined how to coordinate these launches. On 17 September 2026, Ray Allensworth, Vice President of Spacecraft at Firefly, spoke on an industry launch-availability panel, urging the National Aeronautics and Space Administration (NASA) to increase its involvement in small-launch procurement and manifest pairing.
International small-lift competitors are also entering service. The German launch provider Isar Aerospace reached orbit on 5 September 2026 on the second flight of its Spectrum rocket, successfully deploying six satellites after its maiden test flight crashed 30 seconds after liftoff. The small-launch sector is expanding, but operational consistency remains the deciding competitive factor.
Firefly Aerospace Corporate Overview
Firefly Aerospace transitioned into a publicly traded company on the Nasdaq exchange under the ticker symbol FLY. The company priced its initial public offering on 6 August 2025 at $45.00 per share, issuing 22.2 million shares to raise approximately $998.6 million in gross capital. Shares climbed more than 30 percent during the initial day of trading, closing at $60.35.
Beyond the Alpha launch vehicle, Firefly is developing a larger medium-lift rocket named Eclipse in collaboration with defense contractor Northrop Grumman. Investors and space industry analysts track the company’s financial filings and corporate progress via our dedicated guide to Firefly Aerospace stock.
Operational Outlook for Small Satellite Operators
Alpha’s competitive position depends entirely on how the Block II configuration performs over its next sequence of flights. If Flight 8 achieves full mission success in late 2026, Firefly can begin demonstrating the launch cadence needed to attract regular commercial constellation deployments.
Until Alpha establishes an unbroken series of orbital successes, mission managers must balance the rocket’s payload capacity against its historical 43 percent success rate. Operators with payloads in the 500 to 1,000 kilogram range should track Firefly’s upcoming Block II mission updates, assess integration timelines through primary launch sites like Vandenberg’s SLC-2W, and consult our reference guide to launch vehicles to evaluate competing options.