aicoolies logo
Floci logo
Floci logo

Floci

Free open-source local AWS emulator as a drop-in LocalStack replacement

open sourceupdated Jul 9, 2026

Floci is a free open-source AWS emulator designed as a lightweight drop-in replacement for LocalStack Community Edition. It runs on port 4566 with the same endpoint conventions, supporting S3, SQS, DynamoDB, RDS, ElastiCache, API Gateway, Cognito, IAM, and twenty-plus other services. The Docker image is ninety megabytes versus LocalStack's one gigabyte and starts in twenty-four milliseconds.

Floci provides a lightweight alternative to LocalStack for local AWS development and testing. The emulator supports the same port and endpoint conventions as LocalStack Community Edition, meaning existing development configurations and test suites work without modification. Supported services include S3, SQS, DynamoDB, RDS, ElastiCache, API Gateway, Cognito, IAM, STS, Kinesis, KMS, and over twenty additional AWS services that cover the most common development workflows.

The performance and resource advantages are substantial. Floci's Docker image weighs approximately ninety megabytes compared to LocalStack's roughly one gigabyte. Cold start time is twenty-four milliseconds with approximately thirteen megabytes of idle memory consumption. For development teams running emulators on developer laptops or in CI/CD pipelines where container size and startup time directly impact iteration speed, these improvements translate to faster feedback loops.

Released as a free open-source project with no authentication tokens required unlike LocalStack's commercial features, Floci removes the friction of local AWS development entirely. The tool targets teams that need AWS service emulation for integration testing without the resource overhead or licensing considerations of larger emulation platforms.

Pricing

Free and open-source; no auth token required

Platforms

Docker container; 90MB image; port 4566; 20+ AWS services

Categories

Tags

Use Cases

Related Tools

computed discovery: shared active categories · kept separate from editor-verified Alternatives

KTransformers parent kvcache-ai logo

KTransformers

Heterogeneous CPU-GPU inference and SFT for large MoE models

Open-source framework for running and fine-tuning large Mixture-of-Experts models with heterogeneous CPU-GPU execution, optimized kernels, limited VRAM and SGLang or LLaMA-Factory integrations.

Open Source
vLLM Production Stack parent vLLM logo

vLLM Production Stack

Official Kubernetes and Helm reference stack built on the vLLM inference engine

Official vLLM reference implementation for scaling the existing inference engine on Kubernetes with Helm, request routing, KV-cache offload, autoscaling and Prometheus/Grafana observability.

Open Source
Dynamo logo

NVIDIA Dynamo

Distributed inference orchestration above vLLM, SGLang and TensorRT-LLM

Open-source, datacenter-scale orchestration layer that coordinates vLLM, SGLang and TensorRT-LLM across nodes with disaggregated serving, KV-aware routing, multi-tier cache management and automatic scaling.

Open Source
GPUStack logo

GPUStack

Open-source GPU control plane for scalable AI model serving

Open-source GPU cluster manager that configures vLLM, SGLang, TensorRT-LLM or custom engines, serves models through compatible APIs, and provisions SSH-accessible GPU instances across on-premises, Kubernetes and cloud environments.

Open Source
MCPJam logo

MCPJam Inspector

Test and debug MCP servers before they ship

Open-source platform for inspecting, debugging and regression-testing MCP servers, MCP Apps and ChatGPT apps, with OAuth and protocol conformance for local and CI workflows.

freemiumOpen SourceTelemetry
Mooncake logo

Mooncake

Disaggregated KV cache storage and transfer for LLM serving

Open-source infrastructure for disaggregated LLM serving that pools KV caches across prefill and decode workers, with high-performance transfer, distributed storage and integrations for vLLM and SGLang.

Open Source

FAQ

What is Floci?

Floci is a free open-source AWS emulator designed as a lightweight drop-in replacement for LocalStack Community Edition. It runs on port 4566 with the same endpoint conventions, supporting S3, SQS, DynamoDB, RDS, ElastiCache, API Gateway, Cognito, IAM, and twenty-plus other services. The Docker image is ninety megabytes versus LocalStack's one gigabyte and starts in twenty-four milliseconds.

Is Floci free?

Yes — Floci is open source and free to use. Free and open-source; no auth token required

Is Floci open source?

Yes — Floci is open source.

What are the best Floci alternatives?

The top editor-verified Floci alternatives are PocketBase, Anchor Browser.