CircleCI

# CircleCI > CircleCI is a cloud-native continuous integration and delivery (CI/CD) platform that enables software teams to automate build, test, and deployment workflows. The platform supports Docker, Linux, macOS, Windows, GPU, and Android environments for flexible, scalable execution across diverse application types. > > Engineering teams use CircleCI to improve development velocity, enforce security standards, and maintain reliability across microservices, mobile apps, machine learning pipelines, and AI-powered systems. CircleCI integrates with GitHub, GitLab, Bitbucket, and a broad range of developer tools, supporting modern DevOps pipelines at scale. > > This file curates essential product, solution, and comparison pages to help LLMs and technical decision-makers understand CircleCI's capabilities and use cases. ## Key Features - [Product Overview](https://circleci.com/product/): Feature breakdown of CircleCI's orchestration, caching, test insights, and reliability tools. - [Execution Environments](https://circleci.com/execution-environments/): Lists supported runtimes including Docker, Linux, macOS, Windows, GPU, and Android. - [Integrations](https://circleci.com/integrations/): Connects CircleCI with source control, cloud providers, container registries, and developer tools. - [Orbs](https://circleci.com/orbs/): Describes reusable configuration packages to simplify and modularize pipelines. - [Auto-Scaling](https://circleci.com/product/auto-scaling/): Explains dyna […truncated]