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ag-ui vs deer-flow

ag-ui and deer-flow share 16 technologies: FastAPI, uvicorn, React, Next.js, LangChain, LangGraph, Tailwind CSS, next-themes, class-variance-authority, tailwind-merge, Radix UI, embla-carousel-react, Lucide, streamdown, Zod, and ai. Both are written in Python.

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What they share and what sets them apart

ag-ui-protocol

ag-ui

AG-UI: the Agent-User Interaction Protocol. Bring Agents into Frontend Applications.

Python17.1kRead on November 7, 2026, at commit 37b4da9What is ag-ui built with?

Only in ag-ui

In common

bytedance

deer-flow

An open-source long-horizon SuperAgent harness that researches, codes, and creates. With the help of sandboxes, memories, tools, skill, subagents and message gateway, it handles different levels of tasks that could take minutes to hours.

Python85kRead on November 4, 2026, at commit a46d922What is deer-flow built with?

Only in deer-flow

Side by side

SizeLines written by people and agents, without generated ones; code files, without tests.
ag-ui879,462 lines written1,084 code files
deer-flow1,085,017 lines written1,515 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.
ag-ui22.7% of its commits signed by AIWith Claude Code, Codex, GitHub Copilot, and Cursor
deer-flow12.7% of its commits signed by AIWith Claude Code, GitHub Copilot, Cursor, Codex, and Factory
ActivityFrom GitHub and its history, on the day SeeRepo read it.
ag-uiLast push November 6, 20263,939 commits17,052 stars
deer-flowLast push November 4, 20264,588 commits84,984 stars
TestsThe files that test the code, and the share of code files a test imports.
ag-ui1,756 test files60.9% of its code files have a test that imports them
deer-flow1,922 test files72.5% of its code files have a test that imports them

Frequently asked questions

Which is bigger, ag-ui or deer-flow?
deer-flow, with 1,085,017 lines written; ag-ui has 879,462.

The proof: bytedance/deer-flow's code at commit a46d922

Which has more GitHub stars, ag-ui or deer-flow?
deer-flow, with 84,984 stars; ag-ui has 17,052.

The proof: bytedance/deer-flow on GitHub

Which has more tests, ag-ui or deer-flow?
deer-flow, with 1,922 test files; ag-ui has 1,756.

The proof: bytedance/deer-flow's code at commit a46d922

Which was updated more recently, ag-ui or deer-flow?
ag-ui: its last push was on November 6, 2026, and deer-flow's on November 4, 2026.

The proof: ag-ui-protocol/ag-ui's commits on GitHub

Which has more commits signed by AI, ag-ui or deer-flow?
ag-ui: an AI signed 22.7% of its commits, with Claude Code, Codex, GitHub Copilot, and Cursor; in deer-flow, 12.7%.

The proof: the commits each tool signed in ag-ui-protocol/ag-ui

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