Speedscale ranks #7 in API Mocking & Service Virtualization AI search.

Speedscale is an Atlanta-based, Y Combinator-backed developer tool that captures real production API traffic and replays it deterministically in isolated sandboxes to validate code changes before they reach production. Built for Kubernetes-native engineering teams, the platform uses lightweight sidecars and an eBPF collector to record complete request and response payloads—including headers, auth tokens, and timing—then auto-generates service mocks and replays traffic in CI pipelines. Originally focused on load testing and regression testing for microservices, Speedscale has evolved to emphasize AI-code validation, providing Claude Code, Cursor, and Copilot with production context via Model Context Protocol (MCP). Customers include FLYR, Sephora, IHG Hotels & Resorts, Cimpress, and Nylas. The company is SOC2 certified and was named a Representative Vendor in the Gartner Market Guide for API and MCP Testing Tools.