Pneuma— Review, Pricing, Alternatives

Pneuma offers a free tier that allows for 10 generations per day and 30 per month. This tier uses the Sonnet model and provides unlimited agent runtime. You can also download free agents from the store.

Pneuma has a Pro tier available for $5 per month. This tier increases daily generations to 100, offers the Opus model for retries, and includes features like agent editing, publishing to the agent store, and a priority generation queue.

Pneuma is available as a native desktop application for Windows, macOS (supporting both Intel and Apple Silicon processors), and Linux. It is written entirely in Rust and does not use Electron or a browser engine.

Pneuma agents run within a WebAssembly sandbox with a 64MB memory limit and capability-based permissions. They cannot directly access your filesystem, network, or hardware; all I/O is managed through system agents with capability checks. The source code for each agent is inspectable.

You provide a plain language prompt describing the software you need. Pneuma's AI then writes a Rust program, compiles it to WebAssembly, and executes it in a sandboxed thread with GPU rendering. This entire process typically takes a few seconds.

You can create a variety of applications that fit on a screen, such as calculators, dashboards, games, clocks, note-taking apps, data visualizers, and more. Agents can perform actions like making HTTP requests, storing data, playing audio, and communicating with other agents.