AWS launches Lambda Web Functions: HTTP servers with real concurrency

AWS introduced Lambda Web Functions, a new function type where you deploy a plain HTTP server (Express, Hono, Fastify) instead of an event handler. Each execution environment serves up to 128 concurrent requests (64 by default), and billing covers only active CPU time. Available in five regions on Node.js 24 and Arm64.

• Each environment serves up to 128 concurrent requests, 64 by default
• Billing: $0.0000276944 per vCPU-second and $0.30 per million requests in us-east-1
• One-command deploy via aws lambda-web deploy, with canary revisions and rollback
• Available in us-east-1, us-east-2, us-west-2, ap-northeast-1 and eu-west-1