Datadog (NASDAQ: DDOG) delivered a second quarter that beat on both the top and bottom lines. Revenue of $1.12 billion came in 3.9% ahead of the $1.08 billion consensus. Non-GAAP diluted EPS of $0.65 topped the $0.58 estimate by 12%. The 36% year-over-year revenue growth rate accelerated from the prior quarter's pace, and the company raised its full-year guidance, signaling that demand for its observability and security platform remains robust even as enterprises navigate a complex AI deployment cycle.
The headline numbers tell a clear story of operating leverage. Non-GAAP operating margin expanded to 23% from 20% a year ago, a 300-basis-point improvement that came despite continued heavy investment in R&D, which totaled $478 million on a GAAP basis. Revenue scaled faster than costs. Non-GAAP gross margin held steady at 80%, while sales and marketing as a percentage of revenue declined. Free cash flow reached $279 million, a 25% margin, up from 20% in the prior-year quarter. The company now holds $5.0 billion in cash and marketable securities, giving it ample firepower for both organic investment and M&A.
Customer growth remains the engine. Datadog added roughly 870 customers with $100,000 or more in annual recurring revenue over the past year, bringing the total to about 4,720, a 23% increase. That metric matters more than total customer count for a company whose revenue model depends on land-and-expand. The fact that $100k+ ARR customers grew at a faster clip than overall revenue suggests existing customers are spending more, not just that new logos are signing smaller deals. It is a sign of platform stickiness and cross-sell success, particularly as Datadog pushes deeper into AI observability and security.
The Q3 guidance of $1.135 billion to $1.145 billion in revenue implies roughly 30% growth at the midpoint, a deceleration from Q2's 36% but still well above the 20%-ish growth rates that many SaaS peers are reporting. Full-year revenue guidance of $4.45 billion to $4.47 billion implies roughly 31% growth at the midpoint, up from the prior outlook. Management also raised non-GAAP operating income guidance for the full year to $1.01 billion to $1.03 billion, implying a margin of about 23%, consistent with Q2's performance. The guidance raise, rather than a simple reiteration, is the strongest signal that management sees the current demand environment as durable.
What is less visible in the headline numbers is the cost of that growth. GAAP operating income was just $5.5 million, or 0% of revenue, because stock-based compensation alone totaled $220 million, or 19.6% of revenue. That is down slightly from 21.8% a year ago, but it remains a significant drag on GAAP profitability. The gap between GAAP and non-GAAP net income is wide: GAAP net income was $44.6 million, or $0.12 per diluted share, versus the non-GAAP figure of $240 million, or $0.65 per share. For investors focused on GAAP earnings, the story is one of heavy equity dilution masking real cash generation. The diluted share count rose to 371 million from 359 million a year ago, a 3.3% increase that partially offsets the per-share benefit of the earnings growth.
The product pipeline is active. Datadog launched over 100 new capabilities at its DASH conference, including fully autonomous Bits AI for incident response and Bits Agent Builder for custom AI agents. The acquisition of Adaptive ML, a reinforcement learning startup, signals that Datadog is betting on AI agents becoming a core part of how enterprises manage infrastructure. That is a long-term thesis, not a near-term revenue driver, but it positions the company to capture spend as AI workloads move from experimentation to production.
The forward read is straightforward. Datadog is executing well in a market where observability and security are becoming non-negotiable as AI complexity grows. The beat was clean, the guidance was raised, and the customer metrics support the narrative. The risk is that the stock already trades at a premium multiple that leaves little room for error, and any deceleration in the $100k+ ARR customer growth rate would be a warning signal. For now, the data supports the bullish case: revenue growth is accelerating, margins are expanding, and the balance sheet is pristine. The question investors should ask is whether the pace of hiring and R&D spend can sustain this trajectory without compressing margins further. Q3 guidance suggests management believes it can.