Arista Networks vs. Datadog: Which Technology Stock Is a Better Buy in 2026?

Comparing two AI infrastructure leaders: Arista Networks, which provides physical networking switches for data centers, and Datadog, which offers cloud monitoring software. Arista shows stronger profitability (39% net margin vs. 3.1%) and lower valuation (44.5x forward P/E vs. 102.7x), while Datadog has higher gross margins (79.48% vs. 63%) and strong revenue growth. The author recommends Arista Networks for its essential role in AI infrastructure scaling, though both companies are solid performers in their respective niches.