Web Development · head to head
FastAPI vs Namespace
FastAPI
Web Development
A modern, fast, high-performance web framework for building APIs with Python
- From
- Free
- Free plan
- Yes
Namespace
Developer Tools
The dev platform for the next 100 billion commits
- From
- Free
- Free plan
- Yes
The short version
- Each has a real cost: FastAPI no built-in ORM, requires separate database libraries; Namespace developer plan is pay-as-you-go only; minimum usage unclear
- Prices and features above were last checked on 29 August 2026.
Where they differ
Only the attributes on which FastAPI and Namespace 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 FastAPI
Nothing recorded that Namespace does not also cover.
Only in Namespace
- Devboxes
- GitHub Actions runners
- Docker builds
- Cross-invocation caching
- NVMe storage
- High-speed networking
- Multiple OS support
- Bazel and Turborepo support
What people use each for
The jobs each tool is most often brought in to do.
FastAPI
- Building production-ready REST APIs with automatic validationnot Namespace
- Serving machine learning model predictions as REST servicesnot Namespace
- Building crisis management and orchestration platformsnot Namespace
- Enabling real-time APIs with WebSocket connectionsnot Namespace
- Rapid API development reducing boilerplate code significantlynot Namespace
Namespace
- Providing AI coding agents with cloud-based development environmentsnot FastAPI
- Accelerating CI builds with faster GitHub Actions runnersnot FastAPI
- Distributing builds across teams with managed infrastructurenot FastAPI
- Scaling development velocity for monorepo organizationsnot FastAPI
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
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
Namespace
- Developer plan is pay-as-you-go only; minimum usage unclear
- Team plan $100/mo is competitive but usage limits may be tight
- Devbox pricing separate at $0.004/minute could add up quickly
- Enterprise plan requires custom sales conversation
Pricing, plan by plan
FastAPI
FreeNo published plan breakdown. See the FastAPI review.
Namespace
Free- DeveloperFree
- Pay-as-you-go
- On-demand compute
- Docker builds
- Team$100/month
- 100,000 unit minutes
- 1,000 Docker builds
- Everything in Developer
- Business$250/month
- 250,000 unit minutes
- 2,500 Docker builds
- Everything in Team
- Enterprise$undefined/custom
- Custom compute/Docker build limits
- Audit log export
- Enterprise SSO
Which should you pick?
Choose Namespace if
- You need devboxes.
- You want to start without paying.
- You work on Cloud, Mac, Windows, Linux.
- You also want github actions runners.
Questions people ask
- Is FastAPI or Namespace better?
- Neither clearly leads. FastAPI starts at Free and Namespace at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, FastAPI or Namespace?
- FastAPI starts at Free and Namespace at Free.
- Does FastAPI or Namespace run on more platforms?
- FastAPI runs on Web. Namespace runs on Cloud, Mac, Windows, Linux.
- Can I use FastAPI for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is FastAPI best used for?
- FastAPI is most often used for building production-ready rest apis with automatic validation, serving machine learning model predictions as rest services, building crisis management and orchestration platforms, enabling real-time apis with websocket connections. Of those, building production-ready rest apis with automatic validation and serving machine learning model predictions as rest services are not what Namespace is typically brought in for.
- What can FastAPI do that Namespace cannot?
- Namespace covers Devboxes, GitHub Actions runners, Docker builds, Cross-invocation caching.
Answered from the vendors’ own pages
FastAPI: 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.
SourceNamespace: How is compute usage metered on the Developer plan?
Developer plan uses pay-as-you-go billing. Devboxes bill at $0.004 per minute. Storage and caching services have separate usage-based fees. A 30-day free trial is available to test usage patterns.
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.
SourceNamespace: What is the difference between Team and Business plans?
Team ($100/mo) includes 100,000 unit minutes and 1,000 Docker builds with email support. Business ($250/mo) includes 250,000 unit minutes, 2,500 Docker builds, and high concurrency with a dedicated Slack channel.
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.
SourceNamespace: Can Namespace support AI coding agents?
Yes, Namespace Devboxes are specifically designed as feature-rich development environments for AI coding agents, with full tooling and performance optimization.
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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