Phoenix.new

Describe a Phoenix app and watch it take shape in real time.

Intermediate
Screenshot of Phoenix.new, Describe a Phoenix app and watch it take shape in real time

What is Phoenix.new?

Phoenix.new is an app creation tool. A hosted runtime that turns a written description into a running Phoenix app, aimed at developers who want to prototype and share Elixir projects quickly.

Phoenix.new is a hosted environment for building Phoenix applications through natural language. A user writes a description of the app they want, and the service generates and runs the code in a remote runtime, letting the project take shape without a local Elixir or Phoenix installation. The pitch is speed of iteration: describe, watch, adjust, repeat. It is aimed at developers who already know Phoenix or Elixir and want to compress the early, exploratory phase of a project, as well as at teams that need a working prototype to share before committing engineering time. In practice the workflow is conversational. You sign in through Fly.io, describe what the app should do, and the runtime builds it while you watch. Because the environment is remote, prototyping and experimentation do not depend on your machine's setup, and the output can be shared quickly rather than packaged up and handed off. The published walkthrough video, narrated by Chris McCord, shows a real-time Phoenix app being assembled in minutes, which is the clearest statement of what the tool is optimised for: short feedback loops on ideas that are still in flux. Compared with general-purpose code generators, Phoenix.new is narrower. It is tied to one framework and one hosting identity rather than offering a language-agnostic sandbox. That focus is the selling point, since the runtime and the generated output are both Phoenix-shaped, but it also means the tool is a poor fit if your stack is not Elixir. Treat it as a prototyping and sharing layer for Phoenix work, not a replacement for a full development environment or a version-controlled production pipeline. Editorial note: the public homepage is intentionally minimal. Concrete details on plan tiers, usage limits, storage, collaboration, export paths and data handling are not stated there, so they cannot be confirmed from the source material and should be verified with the vendor before committing a team to it.

How do you use Phoenix.new?

  1. 1Read the homepage overview
    Start at the homepage to see the core promise: describe an app and watch it take shape in a remote Phoenix runtime.
    Phoenix.new — Read the homepage overview
  2. 2Watch the walkthrough video
    The embedded video with Chris McCord shows a real-time Phoenix app being built in minutes, which sets expectations for scope and speed.
  3. 3Sign in with Fly.io
    Access is gated behind Fly.io authentication. Use the sign-in link to connect an existing Fly.io identity.
    Phoenix.new — Sign in with Fly.io
  4. 4Describe your app
    Once inside, write a clear description of the application you want. Specificity about features and data helps the runtime build something usable.
  5. 5Iterate on the running app
    Review what was generated, adjust your description or request changes, and let the runtime rebuild so the prototype keeps improving.
  6. 6Share the prototype
    Use the sharing flow to put the working app in front of colleagues or stakeholders while the idea is still cheap to change.

Pros and cons

Pros

  • Turns a plain-language description into a working Phoenix project, which shortens the early prototyping loop.AI
  • Remote runtime removes local Elixir and Phoenix setup from the first step.AI
  • Built specifically for Phoenix, so output matches the framework instead of drifting toward generic code.AI
  • Sharing a prototype is part of the core flow, which suits demos and internal review.AI
  • Chris McCord's walkthrough gives a concrete, watchable example of a full app taking shape.AI

Cons

  • Locked to the Phoenix and Elixir stack, so it is useless for teams on other frameworks.AI
  • Sign-in runs through Fly.io, which adds a hosting dependency before you have seen the product.AI
  • The homepage is very thin: no pricing, limits, export options or data retention details are published.AI
  • No evidence on the page of team collaboration, version history or a path from prototype to production.AI
  • The short demo reel is not a substitute for documented behaviour on larger or messier projects.AI

How much does Phoenix.new cost?

Integrations

Fly.io is the only integration stated on the site, used for authentication into the runtime. No other integrations are documented on the homepage.

Features

Describe an app in plain language and watch it assembled in a remote Phoenix runtime. Prototype quickly, experiment freely and share instantly. Access is tied to a Fly.io sign-in, and a recorded walkthrough demonstrates a full app being built in minutes.

Frequently asked questions about Phoenix.new

  • How do you use Phoenix.new?
    The walkthrough on this page covers 6 steps: 1. Read the homepage overview 2. Watch the walkthrough video 3. Sign in with Fly.io 4. Describe your app 5. Iterate on the running app 6. Share the prototype.
  • What platforms does Phoenix.new support?
    Phoenix.new is available on Web App.
  • What does Phoenix.new integrate with?
    Fly.io is the only integration stated on the site, used for authentication into the runtime. No other integrations are documented on the homepage.
  • What are the limitations of Phoenix.new?
    Locked to the Phoenix and Elixir stack, so it is useless for teams on other frameworks. Sign-in runs through Fly.io, which adds a hosting dependency before you have seen the product. The homepage is very thin: no pricing, limits, export options or data retention details are published.

Status

StatusActive
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Added10/22/2026

Platforms

Web App

Pricing

Free