Source: https://seerepo.com/compare/bytedance/deer-flow/vs/emcie-co/parlant
Markdown source: https://seerepo.com/compare/bytedance/deer-flow/vs/emcie-co/parlant.md
Description: deer-flow and parlant share 19 technologies: FastAPI, aiosqlite, SQLite, starlette, uvicorn, React, jsonschema, Tailwind CSS, class-variance-authority, next-themes, tailwind-merge, sonner, Radix UI, react-resizable-panels, CodeMirror, Lucide, streamdown, rehype-raw, and remark-gfm. Both are written in Python.

# deer-flow vs parlant

deer-flow and parlant share 19 technologies: FastAPI, aiosqlite, SQLite, starlette, uvicorn, React, jsonschema, Tailwind CSS, class-variance-authority, next-themes, tailwind-merge, sonner, Radix UI, react-resizable-panels, CodeMirror, Lucide, streamdown, rehype-raw, and remark-gfm. Both are written in Python.

- [bytedance/deer-flow](https://seerepo.com/r/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.
- [emcie-co/parlant](https://seerepo.com/r/emcie-co/parlant): Parlant is an open platform for building customer-facing chat agents with AI. Describe how the agent should behave, and your coding agent implements it for you.

## What they share and what sets them apart

- In common: FastAPI, aiosqlite, SQLite, starlette, uvicorn, React, jsonschema, Tailwind CSS, class-variance-authority, next-themes, tailwind-merge, sonner, Radix UI, react-resizable-panels, CodeMirror, Lucide, streamdown, rehype-raw, remark-gfm
- Only in deer-flow: langgraph-checkpoint-sqlite, Next.js, SQLAlchemy, alembic, pyjwt, cryptography, bcrypt, LangChain, LangGraph, langchain-openai, langchain-mcp-adapters, e2b-code-interpreter, langchain-anthropic, exa-py, langchain-deepseek, langfuse, html5lib, beautifulsoup4, email-validator, kubernetes, @uiw/codemirror-theme-monokai, motion, @tanstack/react-virtual, @uiw/react-codemirror, use-stick-to-bottom, @streamdown/code, canvas-confetti, cmdk, embla-carousel-react, GSAP, Headless UI, @radix-ui/react-icons, ai, katex, shiki, papaparse, qrcode.react, rehype-katex, rehype-sanitize, remark-math, unist-util-visit, Zod
- Only in parlant: nano-vectordb, OpenAI, fastmcp, Vite, Rich, authlib, keyring, tokenizers, tiktoken, MCP, jinja2, openapi3-parser, coloredlogs, OpenTelemetry, opentelemetry-instrumentation, structlog, boto3, TanStack, vaul, rehype-highlight

## Side by side

| | deer-flow | parlant |
|---|---|---|
| Size | 1,085,017 lines written, 1,515 code files | 214,893 lines written, 334 code files |
| Who writes it | 12.7% of its commits signed by AI. With Claude Code, GitHub Copilot, Cursor, Codex, and Factory | 1.1% of its commits signed by AI. With Claude Code, Codex, and GitHub Copilot |
| Activity | Last push November 4, 2026, 4,588 commits, 84,984 stars | Last push November 6, 2026, 5,148 commits, 18,325 stars |
| Tests | 1,922 test files. 72.5% of its code files have a test that imports them | 257 test files. 57.5% 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, deer-flow or parlant?

deer-flow, with 1,085,017 lines written; parlant has 214,893.

The proof: [bytedance/deer-flow's code at commit a46d922](https://github.com/bytedance/deer-flow/tree/a46d9221f8ab029ef0b7b8caae25c10ab4153395)

### Which has more GitHub stars, deer-flow or parlant?

deer-flow, with 84,984 stars; parlant has 18,325.

The proof: [bytedance/deer-flow on GitHub](https://github.com/bytedance/deer-flow)

### Which has more tests, deer-flow or parlant?

deer-flow, with 1,922 test files; parlant has 257.

The proof: [bytedance/deer-flow's code at commit a46d922](https://github.com/bytedance/deer-flow/tree/a46d9221f8ab029ef0b7b8caae25c10ab4153395)

### Which was updated more recently, deer-flow or parlant?

parlant: its last push was on November 6, 2026, and deer-flow's on November 4, 2026.

The proof: [emcie-co/parlant's commits on GitHub](https://github.com/emcie-co/parlant/commits)

### Which has more commits signed by AI, deer-flow or parlant?

deer-flow: an AI signed 12.7% of its commits, with Claude Code, GitHub Copilot, Cursor, Codex, and Factory; in parlant, 1.1%.

The proof: [the commits each tool signed in bytedance/deer-flow](https://seerepo.com/r/bytedance/deer-flow/ai)

## Sources

- bytedance/deer-flow: Read on November 4, 2026, at commit a46d922 (https://github.com/bytedance/deer-flow/tree/a46d9221f8ab029ef0b7b8caae25c10ab4153395)
- emcie-co/parlant: Read on November 6, 2026, at commit a071a81 (https://github.com/emcie-co/parlant/tree/a071a81406e47b4a0ae3bfd448e4deb170ac2f4b)

## 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.