Google opens its internal WAN to Cloud customers, pitching latency as a frontend concern

What Google actually released

At Next 25, Google announced Cloud WAN, which makes its global wide area network available to external customers for the first time. The network has run internally for 25 years and today spans 2 million miles of lit fiber, 33 subsea cables, and 202 network edge locations connecting 42 cloud regions and 127 cloud zones.

The pitch to enterprises is consolidation. Group Product Manager Satish Kondalam describes customers stitching together separate solutions for site-to-site connectivity, internet access, and cloud services — producing fragmented networks with inconsistent security. Cloud WAN connects branch offices, campuses, public and private cloud applications, SaaS, and the internet through Cloud Interconnect and Cross-Cloud Interconnect.

The framing throughout is the AI era: Google says AI-powered apps and model training drove a 7x increase in WAN bandwidth between 2020 and 2025, handled through a 'multi-shard horizontal network architecture' where each shard is an independent instance of the network that can scale internally or by adding more shards.

The Premium Tier detail that matters for user-facing apps

Buried in the infrastructure story is a claim that speaks directly to anyone shipping a frontend: the Premium Tier network 'ensures traffic connects to Cloud WAN through the geographically closest network edge location, for lower latency and a better user experience.'

That is edge routing sold as a product. For a web or mobile application, the distance between a user and the point where their traffic enters the provider's backbone is one of the few latency variables a team can't fix in code. Google is offering to shorten that first hop across 202 edge locations.

The customer proof point is a performance figure, not a bandwidth spec. Nestlé, after deploying Cloud WAN and using the Premium Tier network to connect branches to their cloud ecosystem, reported that app performance is up 40% with costs down. That is the kind of number a frontend or platform team can act on — it reframes the backbone as something end users feel.

The resilience story is a delivery story

The article opens with the March 2024 undersea cable damage off West Africa, where four subsea cables were cut and outages spread from Côte d'Ivoire to South Africa. Google's Equiano cable, running 9,000+ miles from Portugal to South Africa, stayed live, and businesses using it stayed online while others bought capacity to reconnect.

For applications, that resilience is not abstract. Subhasree Mandal traces the network's evolution as a sequence of delivery problems: reliability and scale for Search and Ads, high-quality video for YouTube, then regional reliability and security once Google was carrying customers' traffic and not just its own.

We were initially building Cloud WAN just for Google and now we're building it for everyone. With the diversity of applications we're running and the volume of data, that's a huge responsibility — it's, dare I say, uncomfortably exciting.Montana Labs

The implication: routing becomes a build-time decision

What Cloud WAN changes for application teams is where responsibility for latency and resilience sits. Previously, choosing how your users' traffic reaches your cloud was often left to whatever the corporate network or public internet delivered. Cloud WAN turns that path into something you provision and pay for, with a tier that explicitly optimizes the user's entry point.

The honest caveat is that the evidence is thin — one named customer, one self-reported 40% figure, and no methodology behind it. Teams should treat the number as a claim to verify against their own traffic, not a benchmark. But the direction is clear: Google is inviting frontend and platform engineers to think about the backbone as part of their performance budget, the same way they already reason about CDN placement and bundle size.