Developer Tools · head to head
Earthly vs Nixpacks
Nixpacks
Developer Tools
Build system that turns a source directory into an OCI image, now in maintenance mode
- From
- Free
- Rated
- -
The short version
- Each has a real cost: Earthly pricing model not published; requires sales contact; Nixpacks the project is in maintenance mode with no commits on the default branch since May 2026 and no release since October 2025, so support for new language versions arrives only if someone forks it.
- They diverge on capability: Earthly covers Policy as code, Nixpacks covers Automatic language detection.
- Prices and features above were last checked on 31 August 2026.
Where they differ
Only the attributes on which Earthly and Nixpacks actually diverge.
Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Developer Tools).
What each one covers
Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.
Only in Earthly
- Policy as code
- Multi-stage enforcement
- AI agent governance
- Repository-wide policies
- Incident response automation
- Compliance management
- Earthfiles build tool
- Satellites
Only in Nixpacks
- Automatic language detection
- No Dockerfile required
- Nix toolchains
- Configuration escape hatches
- Docker layer caching
What people use each for
The jobs each tool is most often brought in to do.
Earthly
- Enforcing engineering standards across AI and human developersnot Nixpacks
- Automating incident response procedures across all repositoriesnot Nixpacks
- Embedding compliance requirements into development workflowsnot Nixpacks
- Standardizing build processes with Earthfilesnot Nixpacks
Nixpacks
- Understanding the build behaviour of a platform that adopted Nixpacks before it was frozennot Earthly
- Producing container images from a polyglot monorepo where nobody wants to own several Dockerfilesnot Earthly
- Reproducing an existing Railway build locally while planning a migration to Railpacknot Earthly
- Comparing what a Nix based builder does differently from a buildpack before choosing a successornot Earthly
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Earthly
- Pricing model not published; requires sales contact
- Earthly Lunar is a recent launch (2025) with limited track record
- Primarily GitHub-focused; limited integration with other platforms
- No public documentation on pricing or feature tiers
Nixpacks
- The project is in maintenance mode with no commits on the default branch since May 2026 and no release since October 2025, so support for new language versions arrives only if someone forks it.
- Build determinism is softer than it appears, because providers pin a nixpkgs archive commit and bumping that archive silently moves compiler and runtime versions underneath a build that looks unchanged.
- Caching is limited to Docker layers rather than a content addressed graph, so a small change early in the build invalidates everything after it, which is exactly the limitation Railpack was rewritten to fix.
- Images carry Nix store layers and come out larger than an equivalent tuned Dockerfile or buildpack output, which costs registry storage and slows cold pulls on scale-out.
- There is no specification, no vendor neutral governance and no third party provider ecosystem, so a single company was able to redirect strategy and leave every downstream user with a frozen build tool.
Pricing, plan by plan
Earthly
FreeNo published plan breakdown. See the Earthly review.
Nixpacks
Free- NixpacksFree
- MIT licensed, no usage limits
- No commercial edition and no support contract
- In maintenance mode, superseded by Railpack
Which should you pick?
Choose Earthly if
- You need policy as code.
- You want to start without paying.
- You work on Web, CLI.
- You also want multi-stage enforcement.
Choose Nixpacks if
- You need automatic language detection.
- You want to start without paying.
- You work on Linux, macOS, CLI, Docker.
- You also want no dockerfile required.
Questions people ask
- Is Earthly or Nixpacks better?
- Neither clearly leads. Earthly starts at Free and Nixpacks at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Earthly or Nixpacks?
- Earthly starts at Free and Nixpacks at Free.
- Does Earthly or Nixpacks run on more platforms?
- Earthly runs on Web, CLI. Nixpacks runs on Linux, macOS, CLI, Docker.
- Can I use Earthly for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is Earthly best used for?
- Earthly is most often used for enforcing engineering standards across ai and human developers, automating incident response procedures across all repositories, embedding compliance requirements into development workflows, standardizing build processes with earthfiles. Of those, enforcing engineering standards across ai and human developers and automating incident response procedures across all repositories are not what Nixpacks is typically brought in for.
- What can Earthly do that Nixpacks cannot?
- Earthly covers Policy as code, Multi-stage enforcement, AI agent governance, Repository-wide policies. Nixpacks covers Automatic language detection, No Dockerfile required, Nix toolchains, Configuration escape hatches.
Answered from the vendors’ own pages
Earthly: What is the difference between Earthfiles and Earthly Lunar?
Earthfiles is an open-source build tool that reached 12,000 GitHub stars and is used by companies like NVIDIA, Intel, and Databricks. Earthly Lunar is a separate governance platform launched in 2025 for enforcing standards across development workflows.
SourceNixpacks: Should I start a new project on Nixpacks?
No. The documentation and README both say it is in maintenance mode and recommend Railpack. Choose Railpack, Cloud Native Buildpacks or a Dockerfile instead.
Earthly: How does Earthly Lunar enforce standards?
Lunar converts engineering standards, compliance requirements, and processes documented in AGENTS.md files, wikis, and incident postmortems into enforceable guardrails that apply consistently across repositories and development stages.
SourceNixpacks: Will my existing Nixpacks builds stop working?
Not immediately. Pinned nixpkgs archives keep resolving, so builds continue. What you lose is support for new runtime major versions and any fix for a provider bug.
Earthly: What is the pricing for Earthly Lunar?
Pricing is not published on the website. Interested customers should contact Earthly's sales team for current pricing and feature tiers.
SourceNixpacks: What replaces it?
Railpack, also from Railway and also MIT licensed, rebuilt as a BuildKit custom frontend for finer grained caching and parallel steps.
Nixpacks: Is it still open source?
Yes, MIT, and the repository is not archived. Being open source does not help much when nobody is merging provider updates.
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