Datadog heads into its third-quarter report with an unusual problem for a company whose business is accelerating: the headline growth rate is almost certain to slow. Management told investors three months ago that its single largest customer, an AI company, renewed with a nine-figure contract but will use fewer seats starting this quarter. That step-down is already baked into guidance, which means the real story on November 4 is whether the rest of the business is strong enough to make the slowdown look like a footnote.

The Street expects non-GAAP earnings of $0.64 per share on revenue of about $1.14 billion, roughly 28.7% higher than a year ago. Those figures sit squarely at the midpoint of management's own forecast of $0.63 to $0.65 per share and $1.135 billion to $1.145 billion in revenue. In other words, analysts have simply adopted the company's guide rather than leaning above it. The Earnings Whisper of $0.69 tells a different story, suggesting the more informed bar is a clean beat of several cents. Datadog has a habit of guiding conservatively, so a print merely in line with consensus could feel like a disappointment.

The math behind the deceleration matters. Revenue grew 36% in the second quarter, capping a run that went from 28% to 29% to 32% before that. Second-quarter revenue of $1.12 billion included a record $115 million sequential gain. The third-quarter guide implies a sequential increase of only around $20 million at the midpoint, a dramatic downshift that reflects how heavily management de-risked the large-customer reduction. If Datadog lands near the top of its range or above it, that would signal the cushion was generous. The figure that best captures underlying health is growth from non-AI customers, which has climbed for five straight quarters, reaching the high-20s last quarter. Another step up would validate the claim that demand is broadening across industries, geographies and customer sizes. A stall would raise the uncomfortable question of whether the core acceleration was peaking just as the largest customer pulled back.

Several supporting indicators deserve attention. New logos contributed about 30% of growth last quarter, up from 20% a year earlier, and the $100,000-plus customer cohort reached roughly 4,720. Investors should want that cohort to keep expanding and multi-product adoption, now 13% of customers using ten or more products, to keep deepening. Net customer additions were unusually thin last quarter, which management attributed to free-to-paid churn at the low end; a second soft reading would invite more skepticism. Gross margin is another swing factor after slipping to 79.6% from 80.9% a year ago. The full-year operating income guide was lifted to a 23% margin, so further gross-margin erosion would test how much of that leverage is sustainable. Early traction from the Dash product launches, Bits.ai, AI Guard and the Adaptive ML acquisition will mostly show up in commentary rather than numbers this quarter, but signs of paid adoption would strengthen the AI narrative.

Expectations have clearly risen. Sentiment has swung to modestly bullish from slightly bearish heading into the last report, and the shares have gained about 23% since then while the S&P 500 slipped. At roughly $280, the stock trades far above its 200-day moving average near $195 but sits about 7% below its post-earnings high of $300.68, so it is not pressing a breakout. A rally of that size leaves less room for an ordinary result.

Ultimately, the quarter hinges on the full-year outlook. Management has raised its 2026 revenue guide twice, from $4.06 billion to $4.10 billion initially to $4.45 billion to $4.47 billion now. A third raise, achieved despite absorbing the largest customer's reduction, would confirm that core acceleration is real and durable. Holding the range flat would suggest the idiosyncratic headwind is weighing more than advertised.