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Fastly

Fastly, Inc. is an American company headquartered in , , specializing in an edge cloud platform that enables developers to build, secure, and deliver fast, scalable digital experiences globally. Founded in March 2011 by Artur Bergman, Tyler McMullen, Simon Wistow, and Gil Penchina, the company focuses on moving data and applications closer to end users at the network edge to reduce and enhance . Fastly's platform handles more than 1.8 trillion requests daily, powering websites and applications for major digital businesses across industries. The company's core offerings include edge delivery for content distribution via its (CDN), edge security features such as web application firewalls (WAF) and DDoS protection, and edge compute capabilities that allow processing and customization at . Fastly emphasizes programmability and control, with innovations like Instant Purge™ enabling content updates in an average of 150 milliseconds. As a publicly traded on the under the ticker FSLY since its IPO in May 2019, Fastly has grown its global network to a capacity of 497 Tbps as of September 30, 2025, serving more than 1.8 trillion requests per day. Fastly's mission is to build a faster, safer, and more engaging by prioritizing , integrity, and inclusion, while respecting user and avoiding exploitation of customer or end-user data. It supports open-source projects and nonprofits with free services, and its platform is used by high-profile customers including , , and to handle traffic surges and ensure reliability. Through continuous innovation, Fastly aims to disrupt traditional models by enabling developers to deploy and logic directly at the edge, reducing reliance on centralized data centers.

History

Founding and early years (2011–2018)

Fastly was founded on March 3, 2011, in , , by Artur Bergman, Tyler McMullen, Simon Wistow, and Gil Penchina. The founders aimed to create a next-generation (CDN) that enabled real-time configuration and customization at the edge, overcoming the rigidity and latency issues of traditional CDNs like slow and limited developer control. Bergman, who had previously served as at Wikia, led the effort as the company's initial CEO, drawing on his experience with open-source technologies such as to build a platform optimized for speed and flexibility. The company launched its service in July 2011 with a small team of seven employees, initially offering a to select developers focused on high-performance web acceleration. Early development emphasized the Configuration Language (VCL), an extension of the open-source Varnish HTTP accelerator, which allowed users to write custom logic for content manipulation directly at the network edge without needing backend changes. This innovation quickly attracted attention for enabling dynamic, programmable CDNs, setting Fastly apart in a market dominated by static caching solutions. By 2012, the platform had exited and begun gaining traction among tech-savvy publishers and developers seeking low-latency delivery. Fastly's growth was fueled by successive funding rounds that supported and product refinement. In May 2012, it raised $4 million in Series A led by , AlphaTech Ventures, and Amplify Partners. This was followed by a $10 million Series B round in June 2013, led by August Capital, which helped scale operations amid rising demand for mobile-optimized content delivery. Key early customer wins included in 2013, which adopted Fastly to handle high-traffic events with real-time purging capabilities, demonstrating the platform's reliability for media sites. Further capital came via a $40 million Series C in September 2014, led by August Capital with participation from and others; a $75 million Series D in August 2015, led by ; and a $50 million Series E in May 2017, led by Sorenson Capital and . These rounds, along with earlier seed investments, totaled over $180 million by 2017, enabling global network buildout and feature enhancements like advanced security integrations. Bergman continued as CEO during this period, guiding the company through its pre-IPO evolution before transitioning to Chief Architect in 2020.

IPO and initial public growth (2019–2020)

Fastly went public on May 17, 2019, listing on the under the FSLY. The company priced its at $16 per share, selling 11.25 million shares of Class A and raising approximately $180 million in gross proceeds, before discounts and commissions. At the IPO price, Fastly achieved an initial of about $1.45 billion. The shares debuted strongly, opening at $21.50 and closing the first trading day at $23.99, representing a 50% gain from the IPO price. Following the IPO, Fastly's experienced significant as it adjusted to public market dynamics. After an initial surge, the shares declined sharply in the ensuing weeks, reaching lows around 23.5% below the IPO price by mid-June 2019. The then recovered, climbing more than 50% in amid broader market enthusiasm for providers, and reached highs near $34 per share by early . Throughout late 2019, FSLY shares exhibited frequent single-day swings exceeding 10%, reflecting investor sensitivity to the company's trajectory and competitive positioning in the edge computing space. To support its public phase, Fastly allocated IPO proceeds toward expanding its sales and marketing efforts as well as its teams, aiming to accelerate customer acquisition and . The company's financial performance strengthened post-IPO, with net revenue rising 39% year-over-year to $200.5 million in from $144.6 million in 2018. This growth was driven by an expanding customer base, which grew to 1,743 total customers by the end of , including 288 enterprise clients generating over $100,000 in annual recurring revenue—such as and —that accounted for 87% of total revenue. These enterprise relationships underscored Fastly's focus on high-value clients relying on its edge cloud platform for scalable content delivery. In 2020, the amplified demand for Fastly's services as businesses shifted to digital operations amid lockdowns and increased online traffic. This surge contributed to robust revenue growth of 45% year-over-year, reaching $290.9 million for the year. The enterprise customer count also expanded to 336 by year-end, reflecting sustained momentum in adoption despite broader economic disruptions.

Acquisitions and strategic expansions (2020–2023)

In September 2020, Fastly acquired Signal Sciences for $775 million, consisting of $200 million in cash and approximately $575 million in shares of Class A common stock, to integrate its next-generation (WAF) and (RASP) technologies into Fastly's edge platform for enhanced capabilities. The deal, announced on and completed in October 2020, enabled Fastly to launch Secure@Edge, a comprehensive combining Signal Sciences' learning-driven protections with Fastly's existing offerings. This acquisition marked Fastly's largest to date and positioned as a core pillar of its edge cloud strategy. Building on this momentum, Fastly pursued further strategic buys in 2022 to expand developer tools and functionalities. In March 2022, it acquired , a platform specializing in scalable messaging and notifications, for an undisclosed amount, allowing developers to build engaging, low-latency applications directly at . Later that year, in May 2022, Fastly acquired , a collaborative coding environment with over 1.8 million users, also for an undisclosed sum, to foster a more accessible developer ecosystem and accelerate "yes code" prototyping on its platform. These moves complemented Fastly's compute capabilities, emphasizing ease-of-use and community-driven innovation. In August 2023, Fastly acquired Domainr, an ICANN-accredited provider of domain availability APIs, for an undisclosed amount, bolstering its domain management and DNS services to simplify secure deployments for customers. This acquisition coincided with the launch of Certainly, Fastly's own TLS , further integrating domain and tools into its edge infrastructure. By the end of 2023, Fastly had completed seven acquisitions overall, transitioning from a primarily provider to a full-service edge cloud platform with deepened expertise in , , and developer tools. The Signal Sciences integration, in particular, fueled notable expansion in the segment, with revenue from acquired products driving year-over-year growth and contributing to increases of over 20% in 2021 and 2022.

Leadership transitions and recent developments (2024–present)

In 2020, Joshua Bixby was appointed as Fastly's CEO, succeeding founder Artur Bergman, who transitioned to the role of Chief Architect and Executive Chairperson. Bixby, who had served as since 2017, led the company through its post-IPO phase until May 2022, when he announced his intention to step down, prompting the board to initiate a search for a successor. In September 2022, Todd Nightingale, formerly Executive Vice and of Cisco's Networking and business, took over as CEO, bringing expertise in networking and to guide Fastly's expansion. Nightingale's tenure emphasized operational efficiency amid market challenges, but he departed in June 2025, after which Kip Compton, Fastly's since January 2024, was promoted to CEO and joined the board. Compton, with over 25 years in technology leadership including as Senior Vice President of and at Networking, focused on accelerating product innovation and customer adoption. His appointment marked a shift toward deepening capabilities, particularly in AI-driven services. In 2024, Fastly undertook significant cost-cutting measures, including layoffs affecting approximately 11% of its global workforce—around 120 employees—in August, as part of a to streamline operations and improve financial health. The move, expected to incur charges of $9.5 million to $10 million in Q3 2024, aimed to align resources with core growth areas like and platforms. Concurrently, in July 2024, a lawsuit was filed against Fastly and its executives, alleging violations of federal securities laws through misleading statements about revenue projections and business outlook during the period from February 15 to May 1, 2024. The suit claimed the company overstated demand for its services, leading to inflated stock prices before a subsequent decline. By 2025, under Compton's leadership, Fastly reported Q2 revenue of $148.7 million, reflecting 12% year-over-year growth and surpassing analyst expectations, driven by strong performance in network services and security offerings. In Q3 2025, revenue reached $158.2 million, up 15% year-over-year and exceeding guidance, with security revenue growing 30% year-over-year. The company intensified efforts to integrate at , including partnerships for bot and content monetization, as well as launching tools for AI workload optimization to reduce and costs for customers. Fastly targeted sustained profitability, raising its full-year 2025 revenue guidance to $610–$614 million (implying about 13% growth), with no major acquisitions announced as it prioritized and operational resilience. These developments built on lessons from Fastly's June 2021 global outage, a roughly one-hour disruption affecting 85% of its network due to a triggered by a customer change, which impacted major websites worldwide. Recent leadership has advanced resilience through enhanced fault isolation, self-healing systems, and multi-cloud strategies to minimize future disruptions and ensure .

Products and services

Edge cloud platform

Fastly's edge cloud platform serves as the foundational infrastructure for delivering content and compute capabilities at the network edge, enabling real-time processing, serving, and securing of applications through a globally distributed, programmable network. This platform allows developers to deploy custom logic directly at edge points of presence (POPs) using Configuration Language (VCL) for fine-grained control over request handling and caching behaviors, as well as (Wasm) for secure, high-performance serverless compute that supports languages like , , and Go. By executing code closer to end users, the platform minimizes and supports dynamic personalization without requiring backend modifications. Key features of the edge cloud platform include Instant Purge, which achieves sub-second cache invalidation with an average propagation time of 150 milliseconds, allowing immediate updates to cached content across the global network. Origin shielding designates a specific Fastly POP as an intermediary layer between edge servers and customer origins, optimizing traffic flow by consolidating requests, significantly reducing origin load in high-traffic scenarios, and improving cache hit ratios. The platform also supports modern protocols such as HTTP/2 for multiplexed, efficient data transfer and HTTP/3 over QUIC for enhanced performance in lossy networks, further reducing connection establishment times. In use cases, the platform accelerates e-commerce websites through integrations like , where it caches dynamic content and optimizes image delivery to enhance load times; for instance, food delivery service reported a 7% improvement in global page load times after implementation, leading to a 1% uplift in conversion rates. For applications, it enables low-latency responses and real-time personalization, with overall global latency reductions averaging 32% faster time-to-first-byte (TTFB) compared to traditional setups. Security layers, such as , are built directly on this platform to protect edge-delivered content. Evolving from its origins as a traditional (CDN), Fastly's edge cloud platform emphasizes developer-centric configuration, allowing API-driven deployments and avoiding through open standards like VCL and Wasm. This shift, announced in 2017, transformed it into a full-stack solution that supports autoscaling for growing applications while serving over 627 enterprise customers as of Q3 2025.

Security solutions

Fastly's security solutions are integrated into its edge cloud platform, providing comprehensive protection against threats, distributed denial-of-service (DDoS) attacks, bots, and abuses. Following the 2020 acquisition of Signal Sciences for $775 million, Fastly developed Secure@Edge, a unified security offering that leverages the acquired technology for advanced threat detection and mitigation at the network edge. The Next-Gen (WAF), derived from Signal Sciences, employs a patented approach combining rules-based signatures and machine learning-driven to safeguard against Top 10 vulnerabilities, such as injection attacks and broken , without requiring extensive configuration or tuning. This zero-config deployment enables rapid activation—often in minutes via calls—across , on-premises, or cloud environments, ensuring low-latency protection for applications and . The WAF's context-aware engine reduces false positives, allowing organizations to block malicious requests in real-time while permitting legitimate traffic. In Q3 2025, Fastly introduced enhancements including Discovery for better protection, a capability for the Next-Gen WAF, , and the Fastly Model Context Protocol (MCP) Server for advanced integration. Fastly's DDoS mitigation capabilities cover Layers 3, 4, and 7 attacks, absorbing up to 497 Tbps of volumetric traffic through its capacity as of September 30, 2025, with always-on and adaptive scrubbing to isolate and neutralize threats before they reach origin servers. Integrated with the edge platform, this service detects anomalies via proprietary algorithms and scales seamlessly during volumetric floods or application-layer exploits, maintaining performance without manual intervention. Bot management and protection features complement the WAF by implementing , challenge-response mechanisms to verify automated traffic, and validation against API schemas to prevent abuse like or . These tools collectively block over 30% of malicious traffic for many clients, particularly in high-risk sectors, by distinguishing good bots (e.g., search engines) from bad ones using behavioral analysis at . Fastly's services uphold a 99.99% uptime () for availability, critical for uninterrupted . In the sector, observed attack volumes doubled to 31% of total threats in Q1 compared to 15% the prior year, underscoring the escalating need for such edge-based defenses.

Media and developer tools

Fastly provides specialized tools for optimizing media delivery, including real-time video and to ensure seamless playback across varying network conditions. The platform supports key protocols such as (HLS) and (DASH), enabling efficient delivery of on-demand and live video content. For platforms like that rely on these standards, Fastly's just-in-time transmuxing converts video files into multiple formats and resolutions at , reducing latency and bandwidth usage without requiring origin server modifications. Image optimization is handled through Fastly Image Optimizer (IO), which performs real-time transformations like resizing, cropping, and format conversion (e.g., to or ) while caching optimized versions to minimize load times and improve user experience. Developer tools at Fastly emphasize edge-native development for enhanced productivity. Compute@Edge allows developers to deploy serverless functions in languages like , , and Go directly on the global network, enabling custom logic for dynamic content manipulation without managing . Integration with , acquired by Fastly in 2022, facilitates collaborative app building by allowing users to prototype and deploy Compute@Edge applications through an intuitive browser-based , streamlining the transition from idea to production. Fastly's support extensive custom integrations, including a provider for infrastructure-as-code management of services, configurations, and deployments, which automates scaling and ensures consistent environments across teams. Onboarding services are designed to accelerate adoption for workflows, offering customized packages that handle complex transfers from CDNs, along with dedicated training sessions and agreements (SLAs) tailored to needs. These packages, ranging from Lite to , include reviews and hands-on guidance, helping organizations achieve up to 89% faster image delivery times as seen in partnerships like imgix. Recent enhancements in 2025 focus on protecting media assets from unauthorized access, with AI Bot Management providing advanced detection and blocking of AI-driven content scrapers, which make up nearly 80% of AI bot traffic observed on the network (where automated bots represent about 37% of total traffic). Complementing this, serves as a built-in publish/subscribe for real-time applications, supporting millions of concurrent subscribers and enabling low-latency pub/sub messaging for features like live updates in streaming services.

Technology and operations

Core architecture

Fastly's core architecture is built around a distributed network of edge nodes that leverage Configuration Language (VCL) for caching and manipulation. These nodes form the foundation of the platform, enabling real-time customization of traffic handling through domain-specific scripting derived from the open-source proxy cache. VCL allows developers to define logic for caching policies, header modifications, and conditional routing directly at the edge, providing granular control over how content is served without relying on origin interventions. The processing pipeline at the edge integrates multiple layers for efficient request handling. Compute capabilities are powered by (Wasm) modules, which execute custom code in languages like , , or Go, allowing for serverless logic execution close to users. Networking employs routing to direct traffic to the nearest optimal (POP), minimizing latency through IP-based geolocation. Storage includes ephemeral options such as KV Store for key-value data, supporting temporary caching and state management during request processing, with limits up to 100 MB per value upon request. Scalability is achieved through horizontal distribution across 92 POPs, enabling the to handle traffic loads with sub-millisecond time-to-first-byte (TTFB) at the 99th . This design supports high-throughput operations by partitioning workloads across cache pools, ensuring consistent performance under varying demand without centralized bottlenecks. Unlike proprietary systems from competitors, Fastly's architecture stems from open-source foundations, offering full configurability and transparency in edge logic deployment. This avoids black-box limitations, empowering users to audit, extend, and optimize configurations via VCL and Wasm without .

Global network infrastructure

Fastly operates a infrastructure comprising 92 points of presence (POPs) distributed across six continents, including , , , , , and & . This extensive coverage enables low-latency content delivery by positioning servers close to end users, with the network achieving a connected capacity of 497 Tbps as of September 30, 2025. Fastly maintains partnerships with Internet Service Providers such as Level 3 and NTT through its Autonomous System (AS) 54113, facilitating settlement-free and efficient traffic exchange at Internet Exchange Points worldwide. The infrastructure relies on custom-built servers deployed in data centers at each POP, optimized for high-performance caching with solid-state drives (SSDs) that provide faster read/write speeds compared to traditional hard drives. Traffic routing is managed via the (BGP), allowing dynamic announcement of POP-specific prefixes to direct requests to the nearest available location while ensuring redundancy and . Fastly commits to a 99.99% availability (SLA) for its Network Services, offering invoice credits for any exceeding defined thresholds, such as 4.32 minutes per month. A significant incident in June 2021 highlighted vulnerabilities in the network's , where a —introduced in a May update—was triggered by a single customer's change, causing a cascade failure that disrupted service across multiple POPs for approximately 49 minutes. In response, Fastly implemented enhanced fault isolation principles, including modular component design with minimal privileges and well-defined interfaces to contain failures within individual POPs or s, preventing widespread propagation. Monitoring systems were upgraded for greater , enabling real-time tracking of requests per and automated to redundant hardware, ensuring graceful degradation—such as serving stale content—during disruptions. By 2025, Fastly expanded its capabilities with the introduction of the in February, incorporating edge semantic caching to optimize traffic handling and reduce for AI-driven applications, alongside ongoing capacity upgrades to support growing demands in emerging markets. Coverage in regions like and was bolstered through existing POPs, such as , with the overall map updated in September to reflect enhanced global reach and performance.

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