The Engineer Who Hated Waiting
The story of Fastly begins with one engineer’s frustration. In the late 2000s, Artur Bergman was the CTO at Wikia (now Fandom) and was fed up with how slow traditional Content Delivery Networks (CDNs) were. These services, which are supposed to speed
up the internet by storing copies of websites closer to users, felt like black boxes. They were rigid, slow to update, and offered developers little to no control. Bergman envisioned something better: a CDN built for developers, by developers. In 2011, he founded Fastly to create a faster, more transparent, and programmable network. Instead of just caching static files like images, Bergman wanted to give developers the power to run code at the network's edge, making sites and apps not just faster, but smarter.
The Secret Sauce: Varnish and Control
Fastly’s key innovation wasn't inventing a new technology from scratch, but supercharging an existing one. The company built its platform on a heavily customized version of Varnish, an open-source web accelerator known for its speed and flexibility. This gave Fastly two superpowers. First, incredible speed. It allowed for things like “instant purge,” letting a customer update their content across the entire global network in about 150 milliseconds. Second, and more importantly, it offered control. Developers could use the Fastly Varnish Configuration Language (VCL) to write custom rules for how their content was handled, cached, and delivered. This developer-first approach was a radical departure from competitors like Akamai or even the more platform-focused Cloudflare. Fastly wasn't selling a simple service; it was offering a high-performance toolkit for the internet's most demanding engineers.
The Day a Single Customer Broke the Internet
On June 8, 2021, much of the internet went dark. Amazon, The New York Times, Spotify, and thousands of other major sites that relied on Fastly suddenly vanished, replaced by error messages. The cause was terrifyingly simple: a single, valid customer configuration change triggered a latent software bug, causing 85% of Fastly's network to fail. The outage lasted about an hour. Yet, what could have been a death blow became a defining moment. Fastly owned the mistake completely. Within a minute of the outage starting, their teams were on it. They provided a detailed, transparent post-mortem explaining exactly what went wrong. This radical transparency, combined with the speed of the fix, didn't shatter customer trust—it reinforced it. The event demonstrated that while no system is infallible, Fastly's architecture and culture were resilient enough to handle a catastrophic failure, fix it, and learn from it.
Why 'Untouchable' Doesn't Mean Unbeatable
In the CDN market, Fastly isn't the biggest player. Cloudflare has a much larger network and a broader, security-focused platform strategy. So what makes Fastly 'untouchable'? The term doesn't refer to market share, but to its defensible niche. Fastly built its business by catering to a specific type of customer: large, performance-obsessed enterprises with sophisticated engineering teams who need granular control. These are companies for whom a few milliseconds of latency can mean millions in revenue. While Cloudflare aims to be an all-in-one platform for the masses, Fastly has doubled down on being the best-in-class tool for a smaller but highly valuable set of power users. Recent financial results from 2026 show this strategy is paying off, with strong revenue growth, rising margins, and accelerating adoption of its security and compute products. Its net retention rate of 117% shows that once customers are in, they stay and spend more.
The Future is at the Edge
Fastly's journey proves that in a world of tech giants, there is immense power in focus. The company became 'untouchable' not by trying to be everything to everyone, but by being indispensable to the right people. It carved out a moat built on technical superiority for a specific workload—high-performance, dynamic content delivery. Today, the company is leveraging that foundation to expand into adjacent areas like advanced security and serverless computing with its 'Compute on Fastly' platform. It is betting that as applications become more complex and AI-driven traffic increases, the need for intelligent, programmable infrastructure at the network's edge will only grow. Fastly’s story isn't just about making websites faster; it’s a lesson in how deep engineering focus and a culture of trust can build a uniquely resilient and vital pillar of the modern internet.
