Floci — Local Cloud Emulators

floci

Drop-in replacement for LocalStack. Same port 4566, 100 services, native binary. Switch with zero code changes.

S3SQSLambdaDynamoDBRDSEKS+94 more

floci-az

Covers Blob, Queue, Table, Functions, App Config, Key Vault, Event Hubs and Service Bus. Native speed, MIT license, no Azure account needed.

BlobQueueTableFunctionsKey VaultEvent HubsService Bus+19 more

floci-gcp

Covers GCS, Pub/Sub, Firestore, Cloud Run, Cloud SQL, GKE and more. All 25 services on one port, native binary. MIT license, no GCP account needed.

GCSPub/SubFirestoreDatastoreSecret ManagerIAM+19 more

floci-oci

Covers Object Storage, Identity, Queue, Streaming, KMS, Vault and Functions. All 8 services on one port. MIT license, no Oracle Cloud account needed.

Object StorageQueueStreamingKMSVaultFunctions+2 more

0

No credentials to leak.

Agents connect with throwaway keys. No real cloud secrets in the agent's context or sandbox. Nothing to exfiltrate, nothing to bill.

24ms

Inner-loop fast.

24 ms cold start, 13 MiB idle. Agents spin up, test, and tear down inside the edit loop instead of waiting on round-trips to a remote account.

real

Real signal, not mock theater.

Lambda, RDS, Redis, and Kafka run for real, so code an agent verifies locally behaves the same in production. No mock-shaped false positives.

✗

Zero blast radius.

Let agents iterate aggressively. Worst case, they reset a local container, not your staging environment or your cloud bill.

$0

MIT Licensed. Forever free.

Fork it, embed it, extend it. No "community edition" sunset, no enterprise feature flags. Every service is available to every developer, always.

✗

No auth token. Ever.

Pull the Docker image and go. No sign-ups, no API keys, no telemetry. LocalStack started requiring an auth token in March 2026. Floci never will.

24ms

Native binary speed.

Compiled with GraalVM Mandrel. Starts in 24ms, idles at 13 MiB, fast enough for inner-loop iteration. Your CI, your laptop, and your AI agents will all thank you.

real

Real engines, not mocks.

Lambda runs in real Docker containers. RDS uses real PostgreSQL/MySQL. ElastiCache runs real Redis. 100% protocol fidelity, no surprises in production.

CI

Ephemeral test environments.

Spin up the full stack inside every pipeline job. 24 ms startup adds nothing to the build, each job gets an isolated cloud, and teardown is free.

λ

Local-first development.

Build against S3, Pub/Sub, or Service Bus on your laptop — offline if you want. No shared dev account to trip over, no credentials to rotate.

tf

Infrastructure-as-code dry runs.

Apply Terraform, OpenTofu, or CloudFormation against localhost first. Catch typos, drift, and bad refactors before they ever touch a real account.

101

Workshops & onboarding.

Teach cloud services with zero billing risk. Every student runs the whole stack on their own machine — no accounts to provision, nothing to clean up.

curl -fsSL https://floci.io/install.sh | sh

floci start && eval $(floci env)

aws s3 mb s3://my-bucket

echo "Why pay for S3 when floci is free? 🎉" > hello-floci.txt
aws s3 cp hello-floci.txt s3://my-bucket/

aws s3 cp s3://my-bucket/hello-floci.txt hello-back.txt
cat hello-back.txt

irm https://floci.io/install.ps1 | iex

floci start; floci env | Invoke-Expression

aws s3 mb s3://my-bucket

"Why pay for S3 when floci is free? 🎉" | Out-File hello-floci.txt
aws s3 cp hello-floci.txt s3://my-bucket/

aws s3 cp s3://my-bucket/hello-floci.txt hello-back.txt; Get-Content hello-back.txt

docker run --rm -p 4566:4566 \
  -v /var/run/docker.sock:/var/run/docker.sock \
  floci/floci:latest

export AWS_ENDPOINT_URL=http://localhost:4566
export AWS_ACCESS_KEY_ID=test AWS_SECRET_ACCESS_KEY=test

aws s3 mb s3://my-bucket

echo "Why pay for S3 when floci is free? 🎉" > hello-floci.txt
aws s3 cp hello-floci.txt s3://my-bucket/

aws s3 cp s3://my-bucket/hello-floci.txt hello-back.txt
cat hello-back.txt

docker run --rm -p 4577:4577 \
  floci/floci-az:latest

export AZURE_STORAGE_CONNECTION_STRING="DefaultEndpointsProtocol=http;\
AccountName=devstoreaccount1;AccountKey=Eby8vdM02xNOcqFlqUwJPLlmEtlCDXJ1OUzFT50uSRZ6IFsuFq2UVErCz4I6tq/K1SZFPTOtr/KBHBeksoGMGw==;\
BlobEndpoint=http://localhost:4577/devstoreaccount1;"

az storage container create -n my-container
echo "Azure locally, no bill, no drama. 🚀" > hello-floci.txt
az storage blob upload -c my-container -f hello-floci.txt -n hello-floci.txt

az storage blob download -c my-container -n hello-floci.txt -f hello-back.txt
cat hello-back.txt

docker run --rm -p 4588:4588 \
  floci/floci-gcp:latest

export CLOUDSDK_API_ENDPOINT_OVERRIDES_STORAGE=http://localhost:4588/
export CLOUDSDK_CORE_PROJECT=floci-local

gcloud storage buckets create gs://my-bucket
echo "No billing alert? Must be floci. ☁️" > hello-floci.txt
gcloud storage cp hello-floci.txt gs://my-bucket/

gcloud storage cp gs://my-bucket/hello-floci.txt hello-back.txt
cat hello-back.txt

docker run --rm -p 4599:4599 \
  -v /var/run/docker.sock:/var/run/docker.sock \
  floci/floci-oci:latest

floci oci setup && eval $(floci oci env)
export TENANCY_OCID=ocid1.tenancy.oc1..flocilocaltenancy0000000000000000000000000000000000000000

oci os bucket create \
  --namespace-name floci-local --name my-bucket --compartment-id $TENANCY_OCID
echo "Oracle Cloud locally — no bill, no drama. 🚀" > hello-floci.txt
oci os object put \
  --namespace-name floci-local --bucket-name my-bucket --file hello-floci.txt

oci os object get \
  --namespace-name floci-local --bucket-name my-bucket --name hello-floci.txt --file hello-back.txt
cat hello-back.txt