Global internet traffic surged 19% in 2025, a jump that underscores just how central the web has become to work, entertainment and infrastructure, and how fragile it remains under the weight of AI bots, DDoS attacks and a world that never really logs off. According to Cloudflare’s newly released “Radar 2025 Year in Review,” usage was flat in the first half of the year before accelerating sharply from August, as new AI services, satellite connections and mobile usage pushed volumes to fresh records.
What Cloudflare Actually Measured
Cloudflare sits behind a huge slice of the modern web, around 20% of global web traffic by some estimates, giving it a privileged vantage point on how data moves. According to the company’s Radar 2025 analysis, global internet traffic grew 19% year‑over‑year when measured by average daily human (non‑bot) request volume, using the second full week of January as a baseline.
The growth was uneven. Cloudflare says traffic was “somewhat flat” through mid‑April, even dipping briefly, before rebounding in May and then climbing more steeply from August onward. By year’s end, its network was routinely handling more than 6 trillion requests per day, up 38% year‑on‑year, with spikes tied to big software launches, news events and outages at major platforms.
Mobile, Satellites and the AI Crawl
Beneath the top‑line 19% sits a more complicated story about who is using the internet, how, and what else is sharing the pipes.
Cloudflare reports that mobile devices now account for “nearly half” of all web request traffic, with that share rising above 50% during many periods of the year.
Android remains the dominant mobile OS globally, but in the U.S. and some wealthy markets iOS now drives a majority of mobile traffic, reaching 56% of mobile requests in the United States, according to a breakdown of the Radar data.
At the network layer, satellite providers are no longer a rounding error. Cloudflare says Starlink traffic “doubled in 2025,” with usage from more than 20 new countries or regions as SpaceX pushed service deeper into remote and rural areas. That expansion both widened the internet’s footprint and added pressure on backbones and edge infrastructure.
Then there are the bots. Cloudflare’s report highlights that a “significant and growing” slice of traffic now comes from automated crawlers, many deployed by AI companies. AI bots accounted for about 4.2% of all HTML requests across Cloudflare’s network in 2025, while overall bot traffic, good and bad, made up nearly half of observed traffic.
Googlebot remained the single largest crawler, generating far more requests than newer AI‑specific bots like PerplexityBot, which Cloudflare says it out‑crawled by a factor of roughly 200 to 1.
A Busier, Brittle and More Encrypted Internet
More traffic also meant more stress. Cloudflare’s security lens shows an internet that is busier, better encrypted, and still under constant attack.
According to the 2025 Radar review, post‑quantum‑hardened encryption, using new key‑exchange algorithms designed to resist future quantum computers now protects 52% of human‑generated web traffic passing through Cloudflare, up from 29% at the start of the year. That rapid shift suggests large platforms are moving aggressively toward “crypto‑agility,” even before practical quantum attacks exist.
At the same time, Cloudflare says it blocked an average of 102 billion cyber threats per day in Q3 2025 alone, with about 2% of all requests classified as potential attacks. The year also saw record‑breaking DDoS campaigns aimed at infrastructure providers and high‑profile web services, periodically knocking major sites offline and reminding users how much depends on a few chokepoints.
Help Net Security’s reading of the report boils the paradox down to a phrase: “busy, brittle, and under constant pressure.” Traffic rose, protections improved, but attackers adapted, and outages rippled faster through an ever‑denser web.
Regional Winners, Losers and Shutdowns
The 19% global figure hides enormous regional variation. SiliconANGLE notes that in some emerging markets, traffic exploded from a low base, while in others it flat‑lined or was forcibly choked off.
Cloudflare highlights Botswana as an outlier: internet traffic there jumped nearly 300% year‑on‑year, reflecting a mix of new infrastructure, cheaper mobile data and the arrival of satellite backhaul. In Saudi Arabia, Cloudflare’s Q3 report shows a 9% quarter‑over‑quarter increase in traffic and a 129% rise in mitigated attack traffic, as both usage and threats surged.
The report also documents how politics and disasters shape the graphs. Cloudflare’s timeline plots a stark drop in traffic from Tanzania during government‑ordered internet shutdowns around contentious elections, and sharp disruptions in Jamaica linked to Hurricane Melissa’s impact on undersea cables and local ISPs. In other words, not all slow‑downs are natural: some are deliberate switches flipped by states.
Business Implications: Capacity, Costs and Competition
For tech and telecom businesses, 19% traffic growth is both opportunity and warning.
On one hand, more data flowing through networks means more demand for CDNs, cloud capacity, security services and edge computing. Cloudflare’s own Q3 numbers show revenue up 31% year‑on‑year on the back of that demand, with around 20% of global web traffic now touching its network at some point.
On the other hand, rising volumes, and rising bot and AI‑crawler loads raise costs. Website operators must decide how much non‑human traffic to tolerate, whether to block certain AI bots, and how to redesign infrastructure and pricing when a meaningful share of their traffic is machines scraping content. Search Engine Journal notes that SEO teams now need to think not only about Googlebot but also about a long tail of AI bots whose crawling can strain servers without sending any human visitors.
For ISPs and backbone providers, the spread of satellite access and new regional hubs also complicates capacity planning. Starlink’s doubling of traffic, as highlighted by Cloudflare, means more interconnection points, peering decisions, and resilience work to ensure satellite on‑ramps do not become choke points.
The Bigger Picture: A Denser, More Contested Internet
Cloudflare’s 2025 review is not a neutral weather report; it is a snapshot of an internet that is denser, more essential, and more contested than ever.
Global traffic is climbing faster than population growth, hinting at longer hours online, richer content and more devices per person. At the same time, the report shows the internet being reshaped by a few powerful forces:
- AI companies vacuuming up data, turning public pages into training sets.
- Security teams racing to deploy post‑quantum defenses before they are needed.
- Governments discovering the blunt power of kill switches and throttling.
- Satellite constellations pulling previously offline communities into the global feed.
Cloudflare’s summary line is understated: “Our ongoing dependence on the Internet is demonstrated by the sustained global growth in internet traffic.” Read between the charts, and the 19% is less a number than a warning: the world is building more of its economy, politics and culture on a substrate that is growing faster, changing shape, and proving just how critical, and vulnerable, that substrate has become.