A large online retailer needed granular URL routing across multiple backend stacks without touching origin servers. They deployed Workers as an API gateway — using Workers KV to persist routing rules, A/B test splits, and authentication tokens at the edge. Backend migrations between Kubernetes clusters and legacy origins became transparent to end-users. Cache hit rates improved dramatically and latency dropped by over 60%.
A global design collaboration platform needed SEO-friendly pre-rendered HTML served to crawlers at scale without overloading their origin. Workers intercept requests, detect bots/crawlers, and serve pre-rendered HTML cached at the edge. Non-bot traffic gets the SPA experience. Page indexing improved dramatically with zero origin load for crawlers.
A major professional sports league faced massive traffic spikes when ticket sales open — within seconds, hundreds of thousands of fans hit the site simultaneously. Workers act as the traffic orchestration layer: enforcing virtual queues, injecting user-specific session state, and rate-limiting bot traffic. Origin servers never see uncontrolled spikes. Fan experience improved significantly with fair queue ordering.
A no-code platform builder needed to deploy thousands of unique customer applications — each with its own frontend, database, and real-time collaboration features. They use Workers for per-customer logic, Durable Objects for WebSocket-backed collaborative editing (similar to Figma's approach), D1 for structured per-app data, R2 for user asset uploads, and Workers KV for edge-cached dynamic content. Pages deploys each customer's React frontend. The entire stack runs on Cloudflare with no other cloud provider.
A platform for digital creators to build course sites and content hubs uses the full Cloudflare developer stack. Workers handle all backend logic; D1 stores lead captures and event data; R2 holds audio and video assets; Stream delivers video-on-demand; Images handles resizing to 8 pre-defined variants; Queues handle async processing jobs; Durable Objects power WebRTC collaborative editing; and Workers AI runs a fine-tuned BERT model for keyword extraction and Llama 3 for content summarization and landing-page generation.
A large enterprise company needed to give employees access to internal documentation and institutional knowledge via a natural-language chat interface — without leaking sensitive data to third-party LLMs. They built a RAG pipeline: documents are chunked and stored as vectors in Vectorize, Workers AI generates embeddings and runs inference (Llama 3 for summarization, SQLizer for query preprocessing), AI Gateway provides a single control plane with rate limiting, observability, and DLP to prevent data leaks. All traffic stays within Cloudflare's network.
An AI-powered "vibe coding" platform generates full-stack web applications from natural language prompts. Every generated app gets its own isolated D1 database, Worker, and R2 bucket — potentially millions of databases. Cloudflare D1's usage-based pricing and Durable Object-backed architecture made it the only viable option: the platform creates hundreds of databases per second, with near-zero cost for idle apps and linear cost scaling for viral ones. Workers Workflows handle the async app-generation pipeline.
A website-builder SaaS needed to give each customer a custom domain with SSL, isolated front-end deployment, and their own subdomain routing — all without managing any server infrastructure. Workers route traffic per-customer, D1 stores customer configurations and sign-up data, R2 stores user assets, Queues handle R2 event notifications, Workflows run background sign-up jobs, Workers AI powers text generation for landing pages, AI Gateway proxies Replicate for image generation, and Cloudflare for SaaS automates custom hostname provisioning and certificate management for every customer domain.