Cloudflare Workers
Edge serverless that runs in 300+ Cloudflare data centres — V8 isolates instead of containers gives sub-millisecond cold start.
Launched 2017. Not Node.js — it's V8 isolates with Web Standard APIs (Request, Response, fetch). No sockets, no filesystem. Complemented by D1 (SQLite), R2 (S3-compatible), KV (eventually consistent KV), Durable Objects (single-instance state), Queues, Cron Triggers.
Per-request pricing radically lower than AWS Lambda. Sweet spot: globally distributed HTTP APIs, A/B testing, edge rendering, AI inference (Workers AI). Competitors: Deno Deploy, Fastly Compute@Edge, AWS Lambda@Edge.