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Floci Offers Free, MIT-Licensed AWS Local Emulator After LocalStack Ends Free Tier

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Floci is a free, MIT-licensed local cloud emulator that launched in March 2026 as an alternative after LocalStack discontinued its free Community edition and archived its open-source repository. Built with Quarkus Native and compiled via GraalVM Mandrel, Floci emulates 68 AWS services, 22 Azure services, and 22 GCP services without requiring cloud credentials or API keys. Unlike mock-based tools, Floci runs real engines — Lambda executes in actual Docker containers, RDS spins up genuine PostgreSQL or MySQL instances, and ElastiCache uses real Redis. The tool starts in 24 milliseconds, uses only 13 MiB of idle memory, and passes all 1,925 SDK compatibility tests in its benchmark suite, compared to LocalStack's 3.3-second startup and 143 MiB memory footprint. Within four months of launch, Floci had accumulated over 16,900 GitHub stars and supports drop-in replacement for LocalStack via the same port 4566.

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