Source: https://seerepo.com/compare/iii-hq/iii/vs/vllm-project/vllm
Markdown source: https://seerepo.com/compare/iii-hq/iii/vs/vllm-project/vllm.md
Description: 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.

# 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.

- [iii-hq/iii](https://seerepo.com/r/iii-hq/iii): Effortlessly compose, extend, and observe every service in real-time for the first time ever.
- [vllm-project/vllm](https://seerepo.com/r/vllm-project/vllm): A high-throughput and memory-efficient inference and serving engine for LLMs

## What they share and what sets them apart

- In common: axum, tower, Tokio, indicatif, Pydantic, jsonschema, opentelemetry-api, tracing, OpenTelemetry, tracing-subscriber, opentelemetry-sdk
- Only in iii: React, rusqlite, lapin, Redis, SQLite, console, cliclack, zip, schemars, github.com/invopop/jsonschema, go.opentelemetry.io/otel, go.opentelemetry.io/otel/trace, tracing-opentelemetry, go.opentelemetry.io/otel/sdk, go.opentelemetry.io/otel/metric, go.opentelemetry.io/otel/log, go.opentelemetry.io/otel/sdk/log, go.opentelemetry.io/otel/sdk/metric, opentelemetry-otlp, opentelemetry-http
- Only in vllm: FastAPI, gitdb, pyzmq, Hugging Face, starlette, Ray, AIOHTTP, mkdocs-material, NVIDIA, OpenAI, peft, quack-kernels, sentencepiece, torch, transformers, einops, safetensors, triton, torchvision, datasets, torchaudio, MCP, tokenizers, tiktoken, markdown, markupsafe, pymdown-extensions, pillow, image, jinja2, msgspec, pydantic-core, python-json-logger, prometheus-client, psutil, prometheus-fastapi-instrumentator

## Side by side

| | iii | vllm |
|---|---|---|
| Size | 523,734 lines written, 690 code files | 2,375,117 lines written, 3,289 code files |
| Who writes it | 4.9% of its commits signed by AI. With Claude Code, CodeRabbit, Cursor, and GitHub Copilot | 12.8% of its commits signed by AI. With Claude Code, Codex, Gemini CLI, Cursor, GitHub Copilot, Devin, Mistral Vibe, CodeRabbit, Factory, and Qwen Code |
| Activity | Last push November 6, 2026, 2,181 commits, 18,926 stars | Last push November 4, 2026, 24,593 commits, 96,302 stars |
| Tests | 452 test files. 21.4% of its code files have a test that imports them | 2,419 test files. 60.2% of its code files have a test that imports them |

- Size: Lines written by people and agents, without generated ones; code files, without tests.
- Who writes it: A commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
- Activity: From GitHub and its history, on the day SeeRepo read it.
- Tests: The files that test the code, and the share of code files a test imports.

## 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](https://github.com/vllm-project/vllm/tree/75f67614971a44050140e3422c1a65fe5004a72b)

### Which has more GitHub stars, iii or vllm?

vllm, with 96,302 stars; iii has 18,926.

The proof: [vllm-project/vllm on GitHub](https://github.com/vllm-project/vllm)

### 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](https://github.com/vllm-project/vllm/tree/75f67614971a44050140e3422c1a65fe5004a72b)

### 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](https://github.com/iii-hq/iii/commits)

### 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](https://seerepo.com/r/vllm-project/vllm/ai)

## Sources

- iii-hq/iii: Read on November 6, 2026, at commit 4094bb4 (https://github.com/iii-hq/iii/tree/4094bb423d98f87ebef8fa7347891fbc485b71db)
- vllm-project/vllm: Read on November 4, 2026, at commit 75f6761 (https://github.com/vllm-project/vllm/tree/75f67614971a44050140e3422c1a65fe5004a72b)

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.