AST SpaceMobile vs. Firefly Aerospace: Which Outer Space Upstart Is a Better Buy in 2026?

The commercialization of space has moved from science fiction to a multi-billion-dollar reality, creating new opportunities for retail investors. AST SpaceMobile Inc (NASDAQ:ASTS) and Firefly Aerospace Inc (NASDAQ:FLY) offer different paths into this final frontier.

While both companies operate in the space economy, they target distinct segments. One aims to revolutionize global communication through a satellite-based broadband network, while the other focuses on the infrastructure needed to reach and operate in orbit. Identifying the better buy requires a look at their business models and financial health.

AST SpaceMobile is developing a space-based cellular broadband network that allows standard, unmodified mobile phones to connect directly to satellites. The company has secured partnerships with major network operators, including AT&T (NYSE:T), Verizon Communications (NYSE:VZ), and Vodafone Group (NASDAQ:VOD), representing nearly 3 billion potential subscribers. Relying on a small number of major carriers for its primary service access adds a layer of risk to the business. However, its revenue-sharing model with these partners provides a clear path to scaling its user base without acquiring individual customers.

In FY 2025, revenue reached approximately $70.9 million, a substantial jump from the $4.4 million reported in the prior fiscal year. The company reported a net loss of nearly $342 million for the period. While revenue growth is accelerating as the company begins its commercial rollout, profitability remains a distant goal during this build-out phase.This resulted in a net margin of -482.2%, illustrating the high costs associated with launching a satellite constellation before reaching full operational scale.

The current debt-to-equity ratio is roughly 1.2x, showing the company relies more on debt than equity to fund its operations. Based on the December 2025 balance sheet, the current ratio is roughly 16.4x. This indicates a high level of liquid assets relative to near-term liabilities. Free cash flow, which is cash flow from operations minus capital expenditures, was more than negative $1.1 billion for FY 2025, as the firm invested heavily in its proprietary manufacturing and launch capabilities. The current ratio is 16.4x, which measures a company's ability to cover short-term liabilities with assets that can be converted to cash quickly.

Firefly Aerospace operates in the defense stocks segment, providing launch services and spacecraft solutions for national security and commercial customers. The company maintains a long-term agreement with Lockheed Martin Corp (NYSE:LMT) through 2031 and collaborates with Northrop Grumman Corp (NYSE:NOC) on major space systems. These relationships provide Firefly with a steady pipeline of government and defense work, focusing on missions from Earth to the Moon. Its acquisition of SciTec in 2025 also added intelligence and data processing capabilities to its portfolio.