Architecture comparison
DevTools
GitHub’s core production platform runs on Microsoft Azure, and GitHub’s own Copilot documentation states its hosted models are served on OpenAI and GitHub’s Azure infrastructure. The published evidence strongly supports Azure as the primary cloud, while the database stack remains the historically documented MySQL/Vitess, Redis, and Elasticsearch setup; public sources here do not substantiate a broader multi-cloud production core.
DevTools
API platform; Postbot AI on OpenAI over API specs/collections.