MiniStack vs Floci vs LocalStack: 2026 Local Cloud Performance Benchmark

MiniStack vs Floci vs LocalStack: Honest Performance Benchmark (April 3rd 2026)

A technical audit of local AWS emulators reveals that MiniStack achieves a 211 MB image size, which is 5x smaller than LocalStack’s 1 GB footprint. While LocalStack requires up to 30 seconds to start, MiniStack initiates in under 2 seconds, providing immediate availability for ASGI servers.

Why This Matters

Local development environments often suffer from high resource overhead and slow feedback loops when emulating cloud infrastructure. The discrepancy between LocalStack’s 500 MB memory footprint and MiniStack’s 39 MB profile demonstrates that optimized local stacks can significantly reduce hardware requirements for developer machines. Furthermore, the availability of real infrastructure like RDS Postgres and ECS containers in open-source tools challenges the traditional paywalled models of established providers.

Key Insights

• MiniStack supports 31 AWS services, representing a 55% increase over Floci’s 20-service coverage as of April 2026.
• Floci maintains a 15-16% performance advantage on DynamoDB operations due to JVM-optimized JSON parsing for the wire format.
• MiniStack is 15-30% faster on SQS, SSM, and SecretsManager operations compared to its competitors.
• Memory usage in Floci grows from 26 MB to 56 MB under load, whereas MiniStack maintains a predictable 39 MB profile.
• MiniStack includes real infrastructure support for RDS (Postgres/MySQL) and Athena (DuckDB) that typically requires Pro licenses in other stacks.

Working Examples

Commands to reproduce the benchmark environment for MiniStack and Floci.

docker system prune -af --volumes
docker pull nahuelnucera/ministack:latest
docker pull hectorvent/floci:latest
docker run --rm -d --name ms -p 4568:4566 nahuelnucera/ministack:latest
docker run --rm -d --name fl -p 4567:4566 hectorvent/floci:latest

Practical Applications

• Use Case: Deploying MiniStack for CI/CD pipelines requiring ECS or Route53 support to avoid the high memory overhead of LocalStack.
• Pitfall: Using Floci for Node.js Lambda testing; the benchmark confirms Floci lacks Node.js execution and warm worker support.
• Use Case: Utilizing MiniStack’s state persistence for 20 services to maintain environment consistency across container restarts.
• Pitfall: Relying on LocalStack Free for infrastructure-heavy workloads like ElastiCache or ECR which are restricted behind the BSL license.

References:

• https://dev.to/nahuel990/ministack-vs-floci-vs-localstack-honest-performance-benchmark-april-3rd-2026-479p