Dagger

Dagger is a programmable continuous integration and continuous delivery platform that allows development teams to build, test, and deploy any codebase repeatably and at scale, using the same programming languages they already use for their applications. Founded by Solomon Hykes, the original creator of Docker, the platform replaces brittle shell scripts and proprietary YAML pipeline configurations with fully programmable pipelines written in Go, Python, Node.js, Java, PHP, or .NET. The core architecture runs all pipeline steps inside containers with sandboxed function execution, ensuring that every operation is isolated, reproducible, and portable across environments. The only runtime dependency is a recent Linux kernel, meaning pipelines configured on a developers laptop will execute identically in CI servers, AI sandboxes, or dedicated cloud infrastructure. The platform provides official SDKs for eight programming languages along with an interactive REPL for developing and debugging pipeline logic. Fine-grained caching with content-addressed storage means intermediate build artifacts and environments are built just-in-time and cached by default, dramatically reducing CI execution time. Host dependencies are declared explicitly and strictly typed, preventing environment-specific failures. Built-in observability includes distributed tracing, structured logs, and metrics for every pipeline step. Dagger Cloud extends the open source engine with team-wide trace sharing, remote caching across CI runs, and centralized pipeline management. The Daggerverse module registry at daggerverse.dev enables sharing and reusing community pipeline modules. Trusted by Ubisoft, CERN OpenLab, Grafana Labs, Adobe, NVIDIA, Ford, Sony, Databricks, Hewlett Packard Enterprise, Anduril, GoFundMe, Depot, Replicated, Leidos, and Cast AI. Open source under the Apache 2.0 license.