Developer Tools · head to head
Earthly vs FastAPI
FastAPI
Web Development
A modern, fast, high-performance web framework for building APIs with Python
- From
- Free
- Free plan
- Yes
The short version
- Each has a real cost: Earthly pricing model not published; requires sales contact; FastAPI no built-in ORM, requires separate database libraries
- Prices and features above were last checked on 29 August 2026.
Where they differ
Only the attributes on which Earthly and FastAPI actually diverge.
Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).
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 FastAPI
Nothing recorded that Earthly does not also cover.
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 FastAPI
- Automating incident response procedures across all repositoriesnot FastAPI
- Embedding compliance requirements into development workflowsnot FastAPI
- Standardizing build processes with Earthfilesnot FastAPI
FastAPI
- Building production-ready REST APIs with automatic validationnot Earthly
- Serving machine learning model predictions as REST servicesnot Earthly
- Building crisis management and orchestration platformsnot Earthly
- Enabling real-time APIs with WebSocket connectionsnot Earthly
- Rapid API development reducing boilerplate code significantlynot 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
FastAPI
- No built-in ORM, requires separate database libraries
- Python-only, cannot build with other languages
- Async/await learning curve for developers new to async programming
- Production deployment requires separate ASGI server configuration
Pricing, plan by plan
Earthly
FreeNo published plan breakdown. See the Earthly review.
FastAPI
FreeNo published plan breakdown. See the FastAPI review.
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.
Questions people ask
- Is Earthly or FastAPI better?
- Neither clearly leads. Earthly starts at Free and FastAPI at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Earthly or FastAPI?
- Earthly starts at Free and FastAPI at Free.
- Does Earthly or FastAPI run on more platforms?
- Earthly runs on Web, CLI. FastAPI runs on Web.
- 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 FastAPI is typically brought in for.
- What can Earthly do that FastAPI cannot?
- Earthly covers Policy as code, Multi-stage enforcement, AI agent governance, Repository-wide policies.
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.
SourceFastAPI: Is FastAPI free to use?
Yes. FastAPI is free and open-source under the MIT License. It costs nothing to download, use, or deploy in production. An optional paid service, FastAPI Cloud, offers one-command deployment for additional convenience, but the core framework is free.
SourceEarthly: 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.
SourceFastAPI: Can I use FastAPI for commercial applications?
Yes. FastAPI's MIT License permits unrestricted commercial use, modification, and distribution. You can build and sell products powered by FastAPI without licensing fees or restrictions.
SourceEarthly: 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.
SourceFastAPI: Does FastAPI include a database or ORM?
No. FastAPI does not include a built-in database or ORM. You must add separate libraries like SQLAlchemy for database access. This gives flexibility to choose the database solution best suited to your project.
SourceFastAPI: What Python versions does FastAPI support?
FastAPI supports Python 3.7 and later. Older Python versions are not compatible, so you must run at least Python 3.7 to use FastAPI.
SourceRelated pages
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