Cloudflare Stock Jumps 15% as Revenue Growth Hits Four-Year High

Cloudflare shares surged more than 15% in extended trading Thursday after the company posted its fastest sales growth in nearly four years, powered by demand for AI-era cybersecurity.

Third-quarter revenue rose 39% year over year to $782.5 million. Adjusted earnings came in at 38 cents per share. Wall Street had expected $737.2 million in revenue and 34 cents, so Cloudflare cleared both bars by wide margins.

The stock had fallen 8% during Thursday's regular session as cybersecurity names sold off amid broader market weakness and AI-competition jitters. The earnings report flipped that sentiment overnight.

What's driving the growth?

Cloudflare, which operates as NET on the exchange, inspects online traffic, speeds up website loads and — increasingly — acts as a tollbooth for AI bots. Its edge is architectural: a globally distributed network rather than centralized data centers. That lets the company inspect traffic and block threats closer to where users actually are, an approach Cloudflare said on the earnings call is more cost-effective than those of hyperscalers and neoclouds.

CEO Matthew Prince pointed to an acceleration in enterprise demand in the earnings release. During the quarter, Cloudflare crossed $3 billion in annualized revenue for the first time.

The AI angle is the heart of the story. Customers are flocking to the company to protect their data from agentic threats, which have increased in severity in recent weeks. Prince said Cloudflare has added roughly 5% of the entire global web to its network since the beginning of July — more than the combined market footprint of all its direct web-routing rivals.

"We've partnered with nearly every major frontier AI lab and security company searching for flaws in existing software," Prince said.

Record customer additions, shrinking cost base

The customer numbers set company records on two timeframes:

• 308 large customers added during the quarter — a quarterly record
• Nearly 1,000 large customers added over the past year — an annual record

The growth is getting cheaper to sustain. Operating expenses came to 55% of revenue, down more than 5 percentage points from a year earlier. Cloudflare is scaling the business while trimming the day-to-day cost of running it.

Can the fourth quarter keep pace?

Cloudflare guided fourth-quarter revenue to between $845 million and $846 million, with adjusted earnings of 43 cents per share. Both figures beat consensus: analysts had modeled $796 million in revenue and 38 cents.

That guidance implies the acceleration isn't a one-off quarter — management expects the momentum to carry into year-end, even as rivals like CrowdStrike and other cybersecurity stocks got crunched in Thursday's rout.

The takeaway in plain words: AI has created a new class of security threats, and Cloudflare is currently the busiest tollbooth on that road.