ACHR vs KTOS: How Archer Aviation and Kratos Defense & Security Solutions Compare (2026)

Same yardstick, side by side (as of July 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.

The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. ACHR and KTOS share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.

This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined ACHR and KTOS exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.

Archer Aviation designs and intends to manufacture and operate electric vertical-takeoff-and-landing (eVTOL) aircraft. Its flagship, Midnight, is a piloted four-passenger air taxi built for short urban hops of roughly 20 to 50 miles, recharging between flights, with the long-term plan to earn money two ways: selling aircraft to partners and operators, and running its own air-taxi network in launch cities. Alongside the passenger business, Archer has opened a defense lane, agreeing to supply its dual-use electric powertrain technology toward Anduril's Omen autonomous air vehicle program with UAE-based EDGE Group. The company remains pre-commercial: it is flight-testing aircraft and pursuing regulatory approval, not yet carrying paying passengers at scale.

Full ACHR guide

Kratos Defense & Security Solutions (KTOS) is a defense technology company that specializes in affordable, high-performance systems the U.S. military wants to buy in volume. Its two segments are Unmanned Systems, home to the XQ-58 Valkyrie collaborative combat aircraft and other tactical drones and target drones, and Kratos Government Solutions, which spans hypersonic systems (Erinyes, Dark Fury), solid rocket motors, turbine and jet engines, microwave electronics, C5ISR, space, training and cyber. The common thread is being the low-cost, fast-to-field alternative to legacy prime contractors, which lines up with Pentagon demand for attritable, mass-producible hardware.

Full KTOS guide

Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.

• ACHR drivers: Certification momentum; International launch via Abu Dhabi.
• KTOS drivers: Valkyrie and collaborative combat aircraft; Hypersonics, rockets and engines.

A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: Archer is effectively pre-revenue (roughly ~$1.6M reported in Q1 2026) while burning cash heavily, with a ~$217.7M net loss that quarter and operating cash use around ~$149M. For KTOS, valuation is the dominant risk: with a triple-digit price-to-earnings ratio, the stock prices in years of sustained growth and any stumble can drive a sharp derating.

Growth-minded investors who believe the theme has years to run tend to accept the richer multiple for more upside; value-minded investors lean toward the cheaper forward earnings and steadier profile. Pick ACHR if you believe its drivers more; KTOS if you believe its. Many investors hold both, but since they share themes, that is a concentrated bet, not diversification. Decide deliberately and check overlap. For the full detail, see the ACHR and KTOS guides.

ACHR. For a development-stage company like Archer, the cash balance and the rate it is spent matter far more than earnings, because there are no meaningful earnings yet. The roughly ~$1.78B of liquidity against a quarterly cash burn near ~$149M is the runway clock that determines how long Archer can pursue certification before needing more capital. Conventional multiples like price-to-earnings do not apply; the relevant questions are milestone progress, dilution, and time to revenue.

KTOS. As of the March 2026 quarter, Kratos posted about $371 million in Q1 revenue, up roughly 23 percent year over year, and raised full-year 2026 guidance toward $1.7 to $1.76 billion. Net income remains small, so with a market cap around $10 billion the price-to-earnings ratio sits in the hundreds and price-to-sales is roughly 7 times. The valuation reflects growth and backlog expectations far more than current earnings.

Headline figures (approximate, 2026-06-27): ACHR shows liquidity (cash, equivalents & short-term investments) ~$1.78B (Q1 2026), revenue ~$1.6M (Q1 2026), effectively pre-revenue, net loss ~$217.7M (Q1 2026), operating cash used ~$149M (Q1 2026); KTOS shows revenue (q1 2026) ~$371M, revenue (ttm) ~$1.4B, fy2026 revenue guidance ~$1.7B to $1.76B, adjusted ebitda (fy2025) ~$120M.

ACHR and KTOS are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined ACHR and KTOS exposure against your real portfolio. It is not an investment adviser.