AMZN vs TTD: 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.

Reading it: TTD is the cheaper of the two on forward earnings, but cheaper is not the same as better. Pair the valuation with growth (how far the forward P/E sits below the trailing P/E) and risk (beta) before you decide.

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. AMZN and TTD 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 AMZN and TTD 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.

Amazon is one of the largest companies in the world, operating across three major business lines. Amazon Web Services (AWS) is the dominant global cloud computing provider, generating around $110 billion in annual revenue and most of the company's operating income. The North America and International e-commerce segments include the Amazon online marketplace, Prime membership, and third-party seller services. Advertising has grown into the third-largest digital ad business in the world (after Google and Meta).

Full AMZN guide

The Trade Desk operates a self-service, cloud-based demand-side platform (DSP) that advertisers and their agencies use to buy digital ad inventory programmatically across channels including connected TV, mobile, display, audio, and the open web. Unlike the large platforms that both sell their own inventory and run the auction, TTD does not own media; it sits purely on the buy side and makes money by charging a percentage fee on the ad spend that flows through its platform, which aligns its incentives with advertisers seeking transparency and reach outside the walled gardens. Its growth has been led by connected TV, and it has invested heavily in identity (the open-source Unified ID 2.0, or UID2, an alternative to third-party cookies), retail data partnerships, and an AI-driven platform called Kokai that distributes machine-learning across the media-buying workflow.

Full TTD guide

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

• AMZN drivers: AWS as the AI infrastructure backbone; Retail margin expansion.
• TTD drivers: Connected TV as the structural tailwind; The independent alternative to walled gardens.

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: Hyperscaler AI capex is concentrated; if model training demand cools, AWS growth slows. For TTD, the central concern is that revenue growth has decelerated sharply, from the mid-to-high 20s percent range in 2024 toward roughly 12 percent in early 2026, raising the question of whether the slowdown is cyclical or structural.

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 AMZN if you believe its drivers more; TTD 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 AMZN and TTD guides.

AMZN. Amazon's headline P/E reflects the aggregate of low-margin retail and high-margin AWS/advertising. The valuation premium is paid for AWS specifically; retail is essentially valued near cost. P/E of 40x is elevated versus the S&P 500 average (~22x), supported by AWS growth re-accelerating.

TTD. As of June 2026 the stock traded near 52-week lows around the low $20s, down roughly 40 to 50 percent over the prior year after a guidance shortfall and growth deceleration. The collapse in the price-to-sales multiple (from a historical median near 18 to under 4) reflects how much of the former premium-grower premium the market has removed. Figures are approximate, tied to the asOf date, and move with each quarterly report; verify current numbers before acting.

Headline figures (approximate, early 2026): AMZN shows revenue (ttm) ~$650 billion, operating margin ~10% (AWS materially higher; retail much lower), net income (ttm) ~$60 billion, eps (ttm) ~$5.50; TTD shows revenue (fy2025) ~$2.9 billion, most recent quarterly growth (q1 2026) ~12% year-over-year (to ~$689 million), adjusted ebitda margin (q1 2026) ~30%, with full-year 2026 guided to at least 40%, trailing p/e ~22 to 24.

AMZN and TTD 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 AMZN and TTD exposure against your real portfolio. It is not an investment adviser.