Show HN: Cygnus – A fast, lightweight self-hostable serverless runtime and PaaS

Category: infrastructure

Tags: serverless, self-hosted, paas, bun, nodejs, seccomp

Score: 6.0/10 (Innovation: 6, Technical: 7, Documentation: 3, Utility: 5)

Cygnus is a self-hostable serverless runtime and PaaS that runs Bun and Node functions with full compatibility, using Linux namespaces and seccomp instead of containers for isolation. It keeps the daemon in the data path to centrally enforce logging, metering, and rate limiting, offering an alternative to container-based serverless platforms.

Target audience: devops, backend developers, platform engineers

Repository: https://cygnus.run

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