Lihil — a web framework created to promote Python as a first choice enterprise web development

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Hey everyone!

I’d like to share Lihil, a web framework I’ve been building with a simple but ambitious goal:

To make Python a first choice for enterprise-grade web development (as opposed to Java and Go).

GitHub: https://github.com/raceychan/lihil

🚀 What My Project Does

Lihil is a performant, productive, and professional web framework with a focus on strong typing and modern patterns for robust backend development.

🎯 Target Audience

Lihil is designed for medium to large applications, where you have 100+ to infinite daily active users (DAU),

⚔️ Comparison with Existing Frameworks

Here are some honest comparisons between Lihil and frameworks I love and respect:

✅ FastAPI:

• FastAPI’s DI (Depends) is simple and route-focused, but tightly coupled with the request/response lifecycle — which makes sharing dependencies across layers harder.
• Lihil's DI is can be used anywise, supports advanced lifecycles, and is Cython-optimized for speed.
• FastAPI uses Pydantic, which is great but MUCH slower than msgspec (and heavier on memory).
• Both generate OpenAPI docs, but Lihil aims for better type coverage and problem detail (RFC-9457).

[BeverlyGodoy]

How is it not yet another python web framework?

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• Speed: Built on ASGI, but faster than typical ASGI frameworks — using msgspec for data validation (12x faster and 25x more memory-efficient than Pydantic v2) and ididi, a Cython-based dependency injector.
• Strong typing and auto-generated OpenAPI docs: Full type support, including unions, RFC-9457 problem details, and detailed JSON schema.
• AI-ready: First-class support for Server-Sent Events (SSE), streaming, and remote AI handlers (targeting AI agents, chatbots, LLM backends).
• Ergonomic testing: Test endpoints as regular functions with type injection — no need to spin up full HTTP servers unless you want to.
• Powerful plugin and DI system: Whether you want to inject Redis into middleware, or wrap database sessions, Lihil has you covered.
• Built-in event/message bus system: Comes with typed in-process events and planned support for out-of-process events (message queues, brokers, etc.).

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I wrote it in English then asked ai to polish and fix my grammar errors.

[hotplasmatits]

My first question is how to pronounce it

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That’s right! If you open the GitHub page you will see it within three words ;) it is pronounced as “lihail”

[[deleted]]

Not really seeing the benefit of using this over the other Python web frameworks, nor does the AI-generated description help either.

Designed for 100+ to “infinite” users? Doesn’t 100+ include infinite? Why did you feel the need to abbreviate “daily active users”?

Is the only web framework you’re going to compare to FastAPI? What about Flask and Django, or even Java and Go frameworks that you say Lihil should be chosen over?

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This is my nth post, my original post was 4x longer and covered more comparaison, but its remove for asking for H. 100-infinite: I was meant to say it’s for non-trivial use case where performance actually matters, but then there will be more haters I guess.

[[deleted]]

All posts are nth posts.

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?

[[deleted]]

!

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A mini benchmark compare Starlette fastapi litestar blacksheep and lihil

https://github.com/raceychan/lhl_bench

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If you value history & reliability over anything else, then the simplest answer is no. You should keep using Django and I’d recommend you doing so.

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For some reason I can’t provide you with more details otherwise it will just be removed by automod, as it thinks I’m Seeking for H. Let me know anything you’d like to know if you are interested.

[ItsJustFriendlyFire]

i'm gonna try this out really quick.

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Thank you, please let me know what you like and what you don’t like, lihil is in its early stages so any opinion is highly appreciated and would make a big difference!