SentinelOne's (NYSE: S) Q1 was fine on the surface. Underneath, it was strong. Revenue of $277M grew 21% year-over-year, a hair below the $277.3M consensus. Non-GAAP EPS of $0.04 beat the $0.02 estimate by a penny, driven by operating leverage that is becoming a repeatable pattern. The real weight of the quarter lies in future indicators. ARR growth accelerated to 23% YoY, reaching $1.163B, with record net new ARR. That's the number that matters for a company still in the middle innings of a land-and-expand cycle.
The beat was modest. The guidance raise was not. SentinelOne lifted its full-year FY2027 revenue outlook to $1.195B–$1.205B from a prior $1.18B–$1.19B range, and raised non-GAAP operating income guidance to $115M–$125M from $100M–$110M. Non-GAAP EPS guidance was lifted to $0.32–$0.38 from $0.28–$0.34. Q2 guidance of $289M–$291M in revenue and $0.06–$0.08 in non-GAAP EPS implies continued momentum. Management is signaling confidence, and the numbers back it up.
Margin compression deserves attention. Non-GAAP operating margin improved to 4% from negative 2% a year ago, a 600bp swing that came despite gross margin compression. GAAP gross margin fell to 72% from 75%, and non-GAAP gross margin slipped to 77% from 79%. The operating margin improvement was driven by sales and marketing efficiency: non-GAAP sales and marketing expense was essentially flat year-over-year at $107.8M versus $108.1M, even as revenue grew 21%. That's the leverage investors have been waiting for. The company is spending less to acquire more, and the record net new ARR suggests the strategy is working.
The most strategically significant data point is the shift in revenue composition. Emerging solutions — AI, Data, Cloud, and other non-endpoint products — now represent approximately 50% of total ARR, up from 39% in FY2026. This is not a rounding error. SentinelOne is successfully diversifying away from its endpoint security roots into higher-growth, higher-value categories. The Prompt Security acquisition, which nearly doubled ARR quarter-over-quarter, and the launch of Purple AI Auto-Investigations are early proof points. The company is positioning itself as an AI-native security platform, not just an endpoint vendor, and the market is responding.
Customer metrics reinforce the thesis. Customers with ARR of $100,000 or more grew 17% YoY to 1,702. More telling is the expansion within enterprise accounts: the percentage of enterprise customers with three or more solutions grew 75% YoY, four or more grew 120%, and five or more grew 150%. These are small bases, but the trajectory is clear. SentinelOne is deepening its footprint in its largest accounts, which drives higher retention and expansion revenue.
Cash flow was a mixed bag. Operating cash flow margin fell to 14% from 23% a year ago, partly due to a $30.7M cash tax payment related to the Israeli Tax Authority agreement. Adjusted free cash flow margin improved to 22% from 20%, and on a trailing-twelve-month basis, adjusted FCF margin hit 6.5%, up from 2.1% a year ago. The company is generating real cash, and the balance sheet remains healthy with $812M in cash and investments.
The forward question is whether the accelerated ARR growth and margin expansion can sustain. The raised guidance implies confidence, but the gross margin compression is worth watching. Non-GAAP gross margin declined 200bp YoY, likely reflecting mix shift toward lower-margin cloud and data products. If that trend continues, operating margin expansion will need to come from even tighter cost control, not gross margin improvement. For now, SentinelOne is executing well on both growth and profitability, and the raised guidance suggests management sees more room to run.