# Earthly

**Source:** https://geo.sig.ai/brands/earthly-io  
**Vertical:** Developer Tools  
**Subcategory:** Build Automation  
**Tier:** Emerging  
**Website:** earthly.dev  
**Last Updated:** 2026-04-14

## Summary

Earthly runs build steps in containers via Earthfile syntax, eliminating inconsistencies between local and CI environments for reproducible, parallelizable builds across any stack.

## Company Overview

Earthly is an open-source build automation framework that runs build steps inside containers, ensuring that builds produce identical results on developer laptops and in CI systems regardless of the underlying environment. Earthly's Earthfile syntax combines familiar concepts from Dockerfile and Makefile, making it approachable to teams already using containers without requiring deep build system expertise. The containerized execution model eliminates the classic "works on my machine" problem by ensuring every dependency is pinned and every environment is identical. Earthly supports parallel execution of independent build targets and efficient layer caching to minimize build time. The company offers Earthly Satellites, a managed remote build service, for teams that need consistent build performance in CI. Founded in 2020 with backing from Uncork Capital and 468 Capital, Earthly has gained adoption among developer teams frustrated with the complexity of existing CI systems and the inconsistency of language-specific build tools. It competes with Bazel, Make, and language-specific build systems in the reproducible build market.

## Frequently Asked Questions

### Why does Earthly run builds inside containers?
Containerized build steps ensure the exact same environment runs on every developer's machine and in CI, eliminating environment-specific build failures and making every build fully reproducible without manual dependency management.

### What is Earthly and what problem does it solve?
Earthly is an open-source build automation tool that runs build steps inside containers, ensuring identical results on developer laptops and CI systems. It solves the classic problem where builds work locally but fail in CI due to environment differences.

### How does Earthly differ from Dockerfile alone?
Dockerfiles build images; Earthly's Earthfile defines multi-stage build pipelines that can run tests, generate code, build multiple targets, and produce artifacts — all containerized and cacheable. Earthly is the orchestration layer that replaces Makefiles for complex build pipelines.

### Does Earthly integrate with popular CI systems?
Yes. Earthly runs identically on GitHub Actions, GitLab CI, CircleCI, Jenkins, and any Linux-based CI system since it uses Docker as the execution environment. The same Earthfile used locally runs without modification in CI.

### What is Earthly Satellites and how does it speed up builds?
Earthly Satellites are remote build runners that provide persistent remote cache and parallel execution. Builds run faster because the cache from previous runs persists between CI jobs, eliminating the cold-start rebuild cost that slows CI pipelines.

### Is Earthly open source?
Yes. The Earthly CLI is open source under the Business Source License (BSL). Earthly Satellites and the Earthly CI managed service are commercial products built on top of the open-source core.

### Can Earthly handle monorepo builds with multiple services?
Yes. Earthly supports monorepo build graphs where individual service targets declare their dependencies on shared library builds. Earthly's dependency graph ensures shared components are only built once and cached results are reused across all services that depend on them.

### Does Earthly support languages beyond Docker-based builds?
Earthly can build any language that has a Docker image — Go, Python, Node.js, Java, Rust, and others — since the build environment is defined by the container image used for each build step. Language support is unlimited by the container ecosystem.

## Tags

developer-tools, open-source, saas, b2b, infrastructure, startup, cloud-native

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*Data from geo.sig.ai Brand Intelligence Database. Updated 2026-04-14.*