JOBY vs SRFM: Which Is the Better Buy in 2026?

Same yardstick, side by side (as of August 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. JOBY and SRFM 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 JOBY and SRFM 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.

Joby Aviation designs and intends to manufacture and operate electric vertical takeoff and landing (eVTOL) aircraft, small piloted air taxis built to carry a few passengers quietly over congested cities. Its plan is to make money as a vertically integrated transportation-as-a-service business: build its own aircraft (with manufacturing practices borrowed from partner and investor Toyota), then sell rides directly to passengers, distributed through partners like Uber and the Blade passenger business it acquired. Until its own aircraft enters revenue service, nearly all reported revenue comes from that acquired Blade helicopter operation rather than from eVTOL flights.

Full JOBY guide

Surf Air Mobility operates a scheduled commuter and regional air-travel business, flying mostly Cessna Caravan aircraft on short routes through Southern Airways Express across the mainland US and Mokulele Airlines in Hawaii, which together form one of the largest commuter networks in the country. On top of that flying business, the company is building two forward-looking bets: an electrification program to bring electric aircraft into regional service, and an AI-enabled operating platform called SurfOS aimed at modernizing how regional carriers schedule, price, and run flights. In 2026 it pivoted its electrification approach away from developing its own powertrain toward buying electric aircraft from BETA Technologies, signing a firm order for 25 all-electric ALIA CTOL planes with options for up to 75 more and removing as much as $100 million of planned capital spending from the prior program.

Full SRFM guide

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

• JOBY drivers: Lead in FAA certification; Strategic backers and balance sheet.
• SRFM drivers: Established regional flying base; Electrification optionality via BETA.

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: Joby is effectively pre-revenue on its core product: the bulk of its reported revenue comes from the acquired Blade helicopter business, not its own eVTOL aircraft, and it posted a net loss of roughly $110 million in Q1 2026. For SRFM, the dominant risk is survival: Surf Air's auditors have flagged substantial doubt about its ability to continue as a going concern, cash was only around $4.2 million entering 2026, and the company has been in default on certain tax and other obligations.

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 JOBY if you believe its drivers more; SRFM 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 JOBY and SRFM guides.

JOBY. For a pre-commercial company, the most important figures are cash and burn rather than earnings: roughly $2.5 billion of liquidity against a few hundred million of cash use per half-year implies several years of runway, but no clear path to profitability yet. The reported revenue largely reflects the acquired Blade helicopter operation, not Joby's own air taxis, so traditional valuation multiples are not very meaningful. At a market cap near $9 billion against minimal core revenue, the stock prices in a commercial future that still depends on FAA certification and scale.

SRFM. A cash-burning regional airline pursuing electrification cannot be read on a normal price-to-earnings basis because there are no earnings. The numbers that matter most are the gap between revenue and cash burn, the runway provided by a very thin cash balance, and the pace of dilution as the company raises money to stay alive. Beyond that, the valuation is really an option on two unproven outcomes, electric aircraft at scale and the SurfOS software platform, which is why the market cap can swing far more than the underlying flying business would suggest. Treat any apparent upside as contingent on financing holding together and execution landing on time.

Headline figures (approximate, 2026-05-06): JOBY shows cash & short-term investments ~$2.5 billion (Q1 2026), revenue (q1 2026) ~$24 million (mostly acquired Blade passenger business, not eVTOL), fy2026 revenue guidance ~$105 to $115 million, net loss (q1 2026) ~$110 million; SRFM shows fy2025 revenue ~$106.6 million, fy2025 net loss ~$110.6 million, cash (q1 2026) ~$4.2 million, debt and tax defaults flagged ~$97 million.

JOBY and SRFM 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 JOBY and SRFM exposure against your real portfolio. It is not an investment adviser.