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iii vs vllm

iii and vllm share 11 technologies: axum, tower, Tokio, indicatif, Pydantic, jsonschema, opentelemetry-api, tracing, OpenTelemetry, tracing-subscriber, and opentelemetry-sdk. iii is written in Rust and vllm in Python.

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What they share and what sets them apart

iii-hq

iii

Effortlessly compose, extend, and observe every service in real-time for the first time ever.

Rust18.9kRead on November 6, 2026, at commit 4094bb4What is iii built with?

Only in iii

In common

vllm-project

vllm

A high-throughput and memory-efficient inference and serving engine for LLMs

Python96.3kRead on November 4, 2026, at commit 75f6761What is vllm built with?

Only in vllm

Side by side

SizeLines written by people and agents, without generated ones; code files, without tests.
iii523,734 lines written690 code files
vllm2,375,117 lines written3,289 code files
Who writes itA commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
iii4.9% of its commits signed by AIWith Claude Code, CodeRabbit, Cursor, and GitHub Copilot
vllm12.8% of its commits signed by AIWith Claude Code, Codex, Gemini CLI, Cursor, GitHub Copilot, Devin, Mistral Vibe, CodeRabbit, Factory, and Qwen Code
ActivityFrom GitHub and its history, on the day SeeRepo read it.
iiiLast push November 6, 20262,181 commits18,926 stars
vllmLast push November 4, 202624,593 commits96,302 stars
TestsThe files that test the code, and the share of code files a test imports.
iii452 test files21.4% of its code files have a test that imports them
vllm2,419 test files60.2% of its code files have a test that imports them

Frequently asked questions

Which is bigger, iii or vllm?
vllm, with 2,375,117 lines written; iii has 523,734.

The proof: vllm-project/vllm's code at commit 75f6761

Which has more GitHub stars, iii or vllm?
vllm, with 96,302 stars; iii has 18,926.

The proof: vllm-project/vllm on GitHub

Which has more tests, iii or vllm?
vllm, with 2,419 test files; iii has 452.

The proof: vllm-project/vllm's code at commit 75f6761

Which was updated more recently, iii or vllm?
iii: its last push was on November 6, 2026, and vllm's on November 4, 2026.

The proof: iii-hq/iii's commits on GitHub

Which has more commits signed by AI, iii or vllm?
vllm: an AI signed 12.8% of its commits, with Claude Code, Codex, Gemini CLI, Cursor, GitHub Copilot, Devin, Mistral Vibe, CodeRabbit, Factory, and Qwen Code; in iii, 4.9%.

The proof: the commits each tool signed in vllm-project/vllm

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