Pounce
A Python ASGI server for production apps, streaming responses, and free-threaded Python
Python ASGI Server for Free-Threaded Python
Production-ready. Streaming-first. Free-threading aware.
Pounce is a pure-Python ASGI server designed for Python 3.14+ and optimized for Python 3.14t. Instead of relying solely on fork-based worker models, Pounce can run worker threads that share a single interpreter and one copy of your application.
import pounce
pounce.run("myapp:app")
Why Use Pounce
Real OS threads, not processes, on Python 3.14t. N workers share one interpreter, one copy of the application, and one set of frozen configuration.
The response pipeline sends body chunks immediately to the socket. Good fit for chunked HTML, event streams, and token delivery.
Python 3.14 stdlibcompression.zstdsupport, plus Server-Timing headers for built-in
observability.
No Rust and no C extensions in the server core. One required dependency (h11) with
optional extras for HTTP/2, WebSocket, and TLS.
Common Use Cases
- Running standard ASGI apps with a Python-native server
- Replacing Uvicorn deployments while keeping a familiar CLI
- Serving streaming responses with low buffering overhead
- Deploying free-threaded Python apps with shared-memory worker threads
Protocols
| Protocol | Backend | Install |
|---|---|---|
| HTTP/1.1 | h11 (pure Python) | built-in |
| HTTP/2 | h2 (stream multiplexing, priority) | pounce[h2] |
| WebSocket | wsproto (including WS over H2) | pounce[ws] |
| TLS | stdlib ssl + truststore | pounce[tls] |
| All | Everything above | pounce[full] |
The Bengal Ecosystem
A structured reactive stack — every layer written in pure Python for 3.14t free-threading.
| ᓚᘏᗢ | Bengal | Static site generator | Docs |
| ∿∿ | Purr | Content runtime | — |
| ⌁⌁ | Chirp | Web framework | Docs |
| =^..^= | Pounce | ASGI server ← You are here | Docs |
| )彡 | Kida | Template engine | Docs |
| ฅᨐฅ | Patitas | Markdown parser | Docs |
| ⌾⌾⌾ | Rosettes | Syntax highlighter | Docs |
Python-native. Free-threading ready. No npm required.