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onyx vs Agent-S

onyx and Agent-S share 12 technologies: FastAPI, Google, OpenAI, uvicorn, scikit-learn, MCP, tiktoken, lxml, beautifulsoup4, pillow, Pydantic, and boto3. Both are written in Python.

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What they share and what sets them apart

onyx-dot-app

onyx

Open Source AI Platform - AI Chat with advanced features that works with every LLM

Python33.3kRead on November 7, 2026, at commit a757433What is onyx built with?

Only in onyx

In common

simular-ai

Agent-S

Agent S: the state-of-the-art open source computer use agents

Python12.9kRead on November 10, 2026, at commit 0fff0e6What is Agent-S built with?

Only in Agent-S

Side by side

SizeLines written by people and agents, without generated ones; code files, without tests.
onyx1,626,990 lines written3,906 code files
Agent-S55,076 lines written135 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.
onyx11.7% of its commits signed by AIWith Claude Code, Devin, Cursor, CodeRabbit, GitHub Copilot, and Sweep
Agent-S5.1% of its commits signed by AIWith Claude Code and Cursor
ActivityFrom GitHub and its history, on the day SeeRepo read it.
onyxLast push November 7, 202611,391 commits33,270 stars
Agent-SLast push October 30, 2026315 commits12,922 stars
TestsThe files that test the code, and the share of code files a test imports.
onyx3,158 test files45.7% of its code files have a test that imports them
Agent-S80 test files37% of its code files have a test that imports them

Frequently asked questions

Which is bigger, onyx or Agent-S?
onyx, with 1,626,990 lines written; Agent-S has 55,076.

The proof: onyx-dot-app/onyx's code at commit a757433

Which has more GitHub stars, onyx or Agent-S?
onyx, with 33,270 stars; Agent-S has 12,922.

The proof: onyx-dot-app/onyx on GitHub

Which has more tests, onyx or Agent-S?
onyx, with 3,158 test files; Agent-S has 80.

The proof: onyx-dot-app/onyx's code at commit a757433

Which was updated more recently, onyx or Agent-S?
onyx: its last push was on November 7, 2026, and Agent-S's on October 30, 2026.

The proof: onyx-dot-app/onyx's commits on GitHub

Which has more commits signed by AI, onyx or Agent-S?
onyx: an AI signed 11.7% of its commits, with Claude Code, Devin, Cursor, CodeRabbit, GitHub Copilot, and Sweep; in Agent-S, 5.1%.

The proof: the commits each tool signed in onyx-dot-app/onyx

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