CETY vs CLNE: 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. CETY and CLNE 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 CETY and CLNE 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.

Clean Energy Technologies, Inc. (CETY) is a small clean-energy technology company headquartered in Irvine, California, that designs and sells systems to turn wasted heat and waste materials into usable power. Its core products are Waste Heat Recovery Solutions built around the patented Clean Cycle generator, an Organic Rankine Cycle (ORC) machine that converts low-grade heat from industrial processes into electricity, and Waste-to-Energy solutions under its HTAP pyrolysis platform, which converts biomass and organic waste into renewable gas, power, and biochar. The company also pursues battery energy storage (BESS) projects and targets sectors such as cement, steel, glass, oil and gas, biomass, anaerobic digestion facilities, and, more recently, data centers.

Full CETY guide

Clean Energy Fuels Corp. is a provider of natural gas and renewable natural gas (RNG) as a fuel for transportation, focused on heavy-duty fleets such as trucking, transit buses, refuse trucks, and airport and municipal vehicles. It owns and operates a large network of fueling stations across the United States and Canada, sells compressed and liquefied natural gas, and is expanding into upstream RNG production, including dairy projects that capture methane from manure and process it into low- or negative-carbon fuel. RNG is the strategic centerpiece because it can carry environmental credits and lower lifecycle emissions, which supports both pricing and the sustainability case fleets use to switch.

Full CLNE guide

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

• CETY drivers: ORC waste-heat-to-power niche; HTAP waste-to-energy platform.
• CLNE drivers: Renewable natural gas volume growth; The Cummins X15N engine and fleet adoption.

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: CETY is a highly speculative micro-cap and the risks are severe. For CLNE, the dominant risk is that Clean Energy has a long track record of GAAP losses and depends on RNG volumes, fuel economics, and environmental credits that can be volatile and policy-dependent.

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 CETY if you believe its drivers more; CLNE 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 CETY and CLNE guides.

CETY. All figures are approximate and tied to the asOf date; because CETY has had late regulatory filings, published financials may be dated, so verify the latest available numbers and filings before acting. With negligible revenue and ongoing losses, price-to-earnings and similar ratios are meaningless here. The stock is valued on narrative (technology, partnerships, pipeline) and on the market's read of financing and delisting risk, not on current fundamentals. Treat any position as high-risk speculation.

CLNE. Figures are approximate and tied to the asOf date; verify live numbers before acting. Because Clean Energy is not consistently profitable on a GAAP basis, traditional earnings multiples are not the main lens; investors focus on RNG volume growth, adjusted EBITDA, and whether natural gas engine adoption expands demand. Environmental credits and policy support are a large and variable part of RNG economics, so results can swing with regulation as much as with fuel sold. Treat this as a speculative energy-transition holding.

Headline figures (approximate, Jul 2026): CETY shows revenue trend Very small and declining; roughly $2 million in 2025, down about 11% year over year (approximate, verify live), profitability Unprofitable with widening losses; 2025 net loss was materially larger than 2024, so no positive earnings to value against, balance sheet Thinly capitalized; likely reliant on external financing that can dilute existing shareholders (verify the latest filing), market cap tier Micro-cap / speculative; verify the current figure live because the low-priced share moves sharply; CLNE shows revenue (q1 2026) ~$117.6 million, up from roughly $103.8 million a year earlier, rng volume (q1 2026) ~67.4 million gallons, up from about 50.6 million a year earlier, net loss (q1 2026) ~$12.4 million, or roughly $0.06 per share, a much smaller loss than the prior year, adjusted ebitda (q1 2026) roughly $16.6 million, broadly in line with the prior-year quarter.

CETY and CLNE 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 CETY and CLNE exposure against your real portfolio. It is not an investment adviser.