GOOGL vs MGNI: 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: MGNI 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. GOOGL and MGNI 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 GOOGL and MGNI 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.

Alphabet is the parent company of Google and is one of the most diversified technology businesses in the world. Search advertising (Google.com search results) remains the single largest revenue contributor and one of the highest-margin businesses ever built. YouTube is the second-largest advertising property online and the largest video platform globally. Google Cloud Platform (GCP) is the third-largest hyperscale cloud after AWS and Azure and has finally turned operating profitable in 2024.

Full GOOGL guide

Magnite is the largest independent omni-channel sell-side advertising platform, or SSP. Publishers plug their inventory into Magnite's technology to sell ads programmatically across formats and channels, and Magnite keeps a take rate on the ads that clear. It reports its business in two broad areas: CTV, which covers streaming and Connected TV inventory and is now the largest and fastest-growing part of the company, and DV+, which covers desktop, mobile, and web display and video. Being independent is central to the pitch: unlike Google or Amazon, Magnite does not own competing media, which it argues lets publishers trust it without conflicts of interest.

Full MGNI guide

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

• GOOGL drivers: Defending Search against AI disruption; Gemini and the model race.
• MGNI drivers: CTV and the shift of TV dollars to streaming; Marquee publisher relationships.

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: Antitrust pressure remains intense (the US DOJ Search case ruling, plus EU and Indian regulatory actions). For MGNI, the central risk is that Magnite is a mid-cap ad-tech company whose revenue is tied to advertising cycles: ad budgets are among the first things cut in a slowdown, so results can be lumpy and CTV growth can decelerate.

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 GOOGL if you believe its drivers more; MGNI 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 GOOGL and MGNI guides.

GOOGL. Alphabet trades at a meaningful discount to Microsoft and to the broader Mag 7 average, reflecting the market's worry about AI displacement risk to Search. If Google defends its core position, the multiple has room to expand.

MGNI. Figures are qualitative and tied to the asOf date; verify live numbers before acting. Magnite trades more on CTV growth, take rates, and adjusted EBITDA than on trailing GAAP earnings, which have at times been thin, so a simple P/E can be misleading. Because it is a mid-cap ad-tech name, results and sentiment can swing sharply around quarterly reports and shifts in the advertising cycle.

Headline figures (approximate, early 2026): GOOGL shows revenue (ttm) ~$370 billion, operating margin ~32%, net income (ttm) ~$110 billion, eps (ttm) ~$9.00; MGNI shows revenue (ttm) In the roughly high-hundreds-of-millions range annually, with quarterly revenue growing at a modest overall rate as strong CTV offsets slower DV+, ctv growth CTV is the largest and fastest-growing segment, generally growing well ahead of the total company when political spend is excluded, profitability / adjusted ebitda GAAP results are thin or breakeven at times; management emphasizes non-GAAP EPS and adjusted EBITDA, which have been positive, balance sheet / debt Carries term-loan debt from prior acquisitions (SpotX era); has worked to reduce leverage and generate free cash flow.

GOOGL and MGNI 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 GOOGL and MGNI exposure against your real portfolio. It is not an investment adviser.