Floci is a free, open-source local AWS emulator for development, testing, and CI. It exposes AWS-shaped services at a local endpoint, allowing existing AWS SDKs, CLI commands, Terraform, CDK, OpenTofu, and test suites to target the emulator without a cloud account or authentication token. Its router serves in-process stateless and stateful services, while services such as Lambda, RDS, Neptune, ElastiCache, MSK, ECS, EC2, EKS, OpenSearch, and CodeBuild use real Docker-backed execution where the project considers it important for fidelity. Floci supports memory, persistent, hybrid, and write-ahead-log storage modes, provides a browser console, and includes Testcontainers modules for isolated instances in tests. It runs through the Floci CLI, Docker or Docker Compose, or standalone binaries for Linux, macOS, and Windows, and is distributed under the MIT license.