The BlackSails platform

Everything a .NET service needs to reach production.

A deliberately focused cloud for ASP.NET Core—from a local or Runnable dotnet publish to a healthy HTTPS service, with fewer moving parts in between.

Deploy a project See pricing

01From source to artifact

A deployment path that understands .NET.

BlackSails starts with the project format and commands your team already knows. Build locally with the CLI or on an isolated Runnable runner; both paths upload only the finished release.

ASP.NET Core projects targeting .NET 8, 9, or 10
Release-mode, framework-dependent Linux x64 publish
Deterministic archives verified with SHA-256
Resumable uploads for large artifacts
Runnable OIDC attestation with no Dockerfile to maintain
GitHub Actions deployments with expiring, scoped service tokens

~/acme/Billing.Api

$ blacksails deploy

ProjectBilling.Api.csproj

Targetnet10.0 / linux-x64

Publishcomplete

Artifactsha256 verified

02Safe releases

Production changes without the cliff edge.

A release becomes current only after it starts successfully and passes its health check. Until then, the previous healthy version stays in place.

Configurable application health-check path
Immutable deployment history
Previous release preserved when readiness fails
One-command rollback to a retained release
Stable hostname across deployments and rollbacks

billing-api / deployments

v18

Deployment v18

Current · 2 min ago

v17

Deployment v17

Ready · rollback available

v16

Deployment v16

Ready · retained

Production changes only after readiness passes.

03Managed runtime

The infrastructure disappears, not the control.

BlackSails provisions and operates the runtime behind a private control plane. You keep the useful controls—secrets, logs, usage, and release history—without owning the plumbing.

Automatic HTTPS on Black Sails and verified custom domains
Environment secrets kept out of build artifacts
Branded deployment logs in the CLI and dashboard
Runtime health monitoring and guarded recovery
Per-application infrastructure isolation
Suspend, resume, archive, restore, and audited deletion controls

billing-acme.apps.blacksails.sh

Public edge

HTTPS ready

Runtime

Healthy

Secrets

4 configured

Isolation

Application scope

04Cost control

Know the rate. Set the ceiling.

Compute is usage-based, local builds are free, and connected Runnable builds carry no extra BlackSails build-minute charge. Every workspace has a hard spending limit, with a warning before workloads reach the cap.

$5 Hobby and $20 Pro monthly minimums become included usage
Metered CPU, memory, egress, and artifact storage
Hard spending limit controlled by the workspace owner
Warning at 80% of the configured limit
Usage and billing status visible in the dashboard

workspace / usage

Current cycle

$12.42

of $25 limit

CPU

$6.10

Memory

$5.82

Egress

$0.31

Artifacts

$0.19

Your next .NET service is one command away.

Bring an ASP.NET Core project. BlackSails handles the release, runtime, and production URL.

Start deploying Read the quickstart