Levelrail

Levelrail is an open source (Apache 2.0) self-hosted PaaS: a Vercel and Heroku alternative that runs on any Linux server you own, from a $5 VPS to a rack. It turns plain servers into a private cloud with Git deploys, automatic HTTPS, databases with verified backups, metrics, logs and alerts, without Kubernetes and without the monitoring stack you would otherwise bolt on. Lightweight. About 200 MB of RAM and roughly 2% of one CPU idle, measured on a real 2 vCPU server running three apps with the default feature set. Numbers and method. Agents, not SSH. Each node runs a small agent that dials out over mTLS and talks to Docker's Engine API directly. No inbound ports, no shelling out to the docker CLI, no polling loops. Observability included. Per-node metrics at 15 second resolution, searchable logs, deploy markers, traces, SLO burn, alert inbox and an idle-footprint health page. No Grafana stack to install. Deploys that protect you. Readiness-gated rollouts, pinned images so rollback always works, canary releases that roll back on errors, deploy diffs, approvals and freezes. Secure by default. Hash-chained audit log you can verify, SSRF-guarded outbound calls, envelope-encrypted secrets with key rotation, scoped tokens, passkeys and TOTP 2FA, OAuth and OIDC sign-in, IAM policies, signed releases. SAML single sign-on and SCIM provisioning are available as a beta feature, off by default. Built for AI agents. An MCP server with a small default tool list (about 2.4k tokens, more load on demand), a scoped-token permission model and an agent skill.