Phoenix vs Sanic
Which should you use? A side-by-side look at what each one does, who it suits, what it costs, how hard it is to set up, and where each falls short.
Open source · MIT
A web framework for Elixir for building web apps and APIs, from prototype to production.
Open source · MIT
A Python web framework for building fast asynchronous web apps and APIs.
The short answer
Choose Phoenix if you need…
- Developers who already use or want to learn Elixir
- Teams building web applications or API servers in Elixir
- Projects that need realtime features, based on the repository topics
- Developers looking for an MIT-licensed, community-supported framework
Choose Sanic if you need…
- Python developers building web APIs or backend services
- Teams that want an asyncio-based Python web framework
- Developers who prefer an ASGI-compatible Python stack
Side-by-side
| Phoenix | Sanic | |
|---|---|---|
| Type | Framework | Framework |
| Price | Free and open source | Free and open source |
| Licence | MIT | MIT |
| GitHub stars | 23.2k | 18.6k |
| Setup difficulty | Intermediate | Intermediate |
| How you get it | See the README | Install with a package manager |
| Main language | Elixir | Python |
| Last code update | 4 days ago | 3 months ago |
What each one is
Phoenix
Phoenix is a web framework written in Elixir, a programming language that runs on the Erlang virtual machine. It provides the building blocks for web applications and APIs, and its README describes it as offering peace of mind from prototype to production. The README is short and points to the official site and hexdocs for the detailed documentation.
Sanic
Sanic is an open-source Python framework for building web applications and API servers. It is built around asynchronous programming (asyncio), which lets one process handle many requests at once. Its description emphasizes speed, though the README provided here was empty, so details beyond the project metadata could not be verified.
Best for
Phoenix
- Developers who already use or want to learn Elixir
- Teams building web applications or API servers in Elixir
- Projects that need realtime features, based on the repository topics
- Developers looking for an MIT-licensed, community-supported framework
Sanic
- Python developers building web APIs or backend services
- Teams that want an asyncio-based Python web framework
- Developers who prefer an ASGI-compatible Python stack
Strengths
Phoenix
- Released under the permissive MIT license
- Active project with recent updates and a large star count
- Documentation is published on hexdocs and the official site
Sanic
- MIT license, permissive for commercial and personal use
- Active project with a recent release (v25.12.1) and a recent push
- Uses asyncio and ASGI, standard tools in modern Python web development
Not ideal for
Phoenix
- People who do not want to learn Elixir, since the framework requires it
- Beginners looking for a simple no-code or low-code tool
- Projects that need a language with a larger ecosystem of ready-made libraries, since the README does not compare ecosystem size
Sanic
- Complete beginners with no Python experience, since writing web servers requires comfort with the language
- Projects that need a full batteries-included framework with built-in admin panels, because the README provided no evidence of such features
- Anyone needing verified performance numbers, since none were available in the supplied README
Trade-offs
Phoenix
- Requires knowledge of Elixir and the Erlang virtual machine
- The README is brief and defers most detail to external documentation
- Building from source involves several Mix steps that assume familiarity with the Elixir toolchain
Sanic
- The supplied README was empty, so features and setup steps are not verified here
- Requires familiarity with asynchronous Python, which has a learning curve
- Speed claims come from the project description and were not independently verified
Getting started
Phoenix
Clone the repository to build from source
git clone https://github.com/phoenixframework/phoenixFetch dependencies for building Phoenix
mix deps.getFrequently asked questions
What is the difference between Phoenix and Sanic?
Phoenix: A web framework for Elixir for building web apps and APIs, from prototype to production. Sanic: A Python web framework for building fast asynchronous web apps and APIs. Phoenix suits developers who already use or want to learn elixir, while Sanic suits python developers building web apis or backend services.
Are Phoenix and Sanic free?
Phoenix: Free and open source. Sanic: Free and open source.
Is Phoenix or Sanic more popular?
Phoenix has more GitHub stars (23.2k) than Sanic (18.6k). Popularity isn't the same as fit — check which one matches your use case above.
What are other alternatives to Phoenix and Sanic?
Other options people compare them with include FastAPI.
Keep comparing
Built from our catalogue entries for both products: open-source details come from each project's README (AI-assisted, refreshed weekly) and GitHub data; AI-tool details are editorial. Spotted something wrong? Let us know from either product's page.