Archer Aviation vs. Firefly Aerospace: Which Aerospace Stock Is a Better Buy in 2026?

The future of transportation is moving beyond the ground as new technologies aim to conquer the skies. Should you invest in Archer Aviation Inc (NYSE:ACHR) or Firefly Aerospace Inc (NASDAQ:FLY) for your portfolio?

Archer focuses on electric vertical takeoff and landing (eVTOL) vehicles for urban air mobility, while Firefly provides launch services and lunar landers for the space industry. Both represent a high-growth, high-risk frontier that attempts to commercialize breakthrough aerospace technologies for government and commercial clients.

The case for Archer Aviation

Archer Aviation designs and builds electric aircraft for short-distance travel, aiming to replace long car commutes with quiet, emission-free flights. The company operates among industrial stocks, targeting major metropolitan areas like Los Angeles and the United Arab Emirates. Its strategy relies on high-profile partnerships, including a conditional purchase agreement with United Airlines for up to $1.5 billion in aircraft. Customer concentration like this adds a layer of risk to the business since the deal depends on FAA certification.

In FY 2025, Archer Aviation reported revenue of $300,000. This early stage revenue was accompanied by a net loss of approximately $618.2 million. This reflects a company still in its pre-commercial phase as it pursues aircraft type and production certification.

As of its December 2025 balance sheet, the debt-to-equity ratio is approximately 0.1x. This ratio compares total debt to shareholder equity, and a lower number suggests the company is not heavily reliant on borrowed money. The current ratio, which measures the ability to pay short-term obligations, is a robust 19.9x. Free cash flow, or the cash left after paying for capital expenditures, was negative $511.7 million in FY 2025.

The case for Firefly Aerospace

Firefly Aerospace operates in the space and defense sectors, providing launch vehicles and lunar landers. Its customer base is well-diversified, including the U.S. Space Force, NASA, and major defense contractors like Lockheed Martin Corp (NYSE:LMT). With a backlog of roughly $1.4 billion as of late 2025, the company has secured long-term demand for its missions. Firefly has also expanded its technical capabilities by acquiring software and AI navigation firms to support its lunar and orbital goals.

In FY 2025, revenue reached approximately $159.9 million, representing a 163% increase over the previous year. This rapid growth suggests the company is successfully scaling its launch operations. Despite the rising sales, Firefly reported a net loss of nearly $298.3 million for the year. The net margin, which shows how much of each dollar in revenue becomes profit, was approximately negative 187%.

As of its December 2025 balance sheet, the debt-to-equity ratio is roughly 0.3x. This indicates a manageable level of debt relative to equity. The so-called current ratio stands at approximately 4.5x, suggesting the company maintains enough liquid assets to cover its upcoming bills. Free cash flow was negative $237.8 million in FY 2025, as the company continues to invest heavily in its manufacturing and R&D facilities.

Risk profile comparison

Archer Aviation faces substantial risks related to its early stage operations and history of losses. The company needs more capital to reach commercial viability and depends heavily on the FAA for aircraft certification. Any delays in the certification process could ruin its launch timelines. Archer also competes with large aerospace firms and must build out complex urban infrastructure, such as charging networks, to succeed.

Firefly Aerospace is sensitive to changes in government spending and the availability of private capital for space research. Operational failures, such as launch delays or test accidents, can significantly hurt revenue. The company also faces intense competition from established players like Northrop Grumman Corp (NYSE:NOC). Additionally, Firefly is managing potential litigation from past merger activities and remains vulnerable to supply chain disruptions caused by global geopolitical conflicts.

Valuation comparison

Firefly Aerospace offers a lower sales multiple while Archer Aviation carries a significantly higher valuation relative to its early revenue. Neither has a forward price to earnings ratio because they are not expected to turn a profit in the coming year.

Valuation metrics sourced from Financial Modeling Prep (FMP) and may differ from other data providers.

Which stock would I buy in 2026?

There are some obvious risks to Firefly Aerospace, including the fact that it has only been public since August 2025, when it sold shares at its initial public offering for $45. The large loss for fiscal 2025 is another. But it's worth considering the road ahead for Firefly.

Firefly Aerospace is the only private company to execute a successful lunar landing, achieving this in March 2025 with its Blue Ghost Mission I. The success of that effort has ingratiated Firefly with NASA, which sent 10 payloads to the Moon with last year's mission. The company now plans annual missions to the Moon to deliver payloads for NASA as part of the agency's aim to construct a permanent lunar base.

While future projections are inherently speculative, Wall Street analysts expect Firfly to top $440 million this year and reach $1 billion in annual revenue in its fiscal 2028.

Archer Aviation is advancing toward commercializing its eVTOL aircraft, backed by emerging regulatory frameworks in the U.S., Japan, South Korea, and Saudi Arabia. To build momentum, Archer is refurbishing Los Angeles's Hawthorne airport as a testing ground and scaling manufacturing to target 50 aircraft per year.

To secure early revenue, management is prioritizing military and cargo applications first. While Wall Street projects Archer will reach profitability by 2030 with $2.3 billion in revenue, significant regulatory and operational hurdles remain.

Investing in a young company like either Firefly Aerospace or Archer Aviation will probably bring some turbulence. The lower P/S ratio and the high-value promise of supporting NASA's moon efforts mean Firefly is likely the better bet for a long-term investor.

Brendan Coffey has no position in any of the stocks mentioned. The Motley Fool has positions in and recommends Firefly Aerospace and Lockheed Martin. The Motley Fool has a disclosure policy.