Source: https://seerepo.com/compare/earendil-works/pi/vs/open-webui/open-webui
Markdown source: https://seerepo.com/compare/earendil-works/pi/vs/open-webui/open-webui.md
Description: pi and open-webui share 4 technologies: OpenAI, marked, yaml, and highlight.js. pi is written in TypeScript and open-webui in Svelte.

# pi vs open-webui

pi and open-webui share 4 technologies: OpenAI, marked, yaml, and highlight.js. pi is written in TypeScript and open-webui in Svelte.

- [earendil-works/pi](https://seerepo.com/r/earendil-works/pi): AI agent toolkit: unified LLM API, agent loop, TUI, coding agent CLI
- [open-webui/open-webui](https://seerepo.com/r/open-webui/open-webui): User-friendly AI Interface (Supports Ollama, OpenAI API, ...)

## What they share and what sets them apart

- In common: OpenAI, marked, yaml, highlight.js
- Only in pi: React, Anthropic, lowlight, @aws-sdk/client-bedrock-runtime, @silvia-odwyer/photon-node, typebox, @xterm/headless
- Only in open-webui: Svelte, SvelteKit, FastAPI, pgvector, psycopg2-binary, pyarrow, pymysql, weaviate-client, Redis, Postgres, pymilvus, SQLite, chromadb, oracledb, pinecone, sql.js, Qdrant, Elasticsearch, Google Cloud Storage, MCP, AIOHTTP, uvicorn, Tailwind CSS, @codemirror/theme-one-dark, tiptap, sortablejs, CodeMirror, tippy.js, @floating-ui/dom, three, Chart.js, Mermaid, xterm, SQLAlchemy, azure-identity, cryptography, pyjwt, bcrypt, rank-bm25, tiktoken, lxml, openpyxl, python-docx, xlrd, dompurify, xlsx, html-entities, pillow, beautifulsoup4, pdfjs-dist, shiki, jspdf, mammoth, @joplin/turndown-plugin-gfm, heic2any, katex, pypdf, python-pptx, turndown, youtube-transcript-api, Pydantic, psutil, boto3, opentelemetry-instrumentation-httpx, opentelemetry-instrumentation-redis, opentelemetry-instrumentation-sqlalchemy

## Side by side

| | pi | open-webui |
|---|---|---|
| Size | 677,258 lines written, 1,543 code files | 405,584 lines written, 1,123 code files |
| Who writes it | 0.3% of its commits signed by AI. With Claude Code, Gemini CLI, Cursor, and Amp | 1.3% of its commits signed by AI. With Claude Code, Aider, Jules, GitHub Copilot, and Cursor |
| Activity | Last push November 4, 2026, 7,130 commits, 119,972 stars | Last push November 4, 2026, 16,932 commits, 157,730 stars |
| Tests | 1,475 test files. 46.8% of its code files have a test that imports them | 3 test files. 0.1% 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, pi or open-webui?

pi, with 677,258 lines written; open-webui has 405,584.

The proof: [earendil-works/pi's code at commit e885255](https://github.com/earendil-works/pi/tree/e88525506177d22b6e93029d8f6db1aab323c74a)

### Which has more GitHub stars, pi or open-webui?

open-webui, with 157,730 stars; pi has 119,972.

The proof: [open-webui/open-webui on GitHub](https://github.com/open-webui/open-webui)

### Which has more tests, pi or open-webui?

pi, with 1,475 test files; open-webui has 3.

The proof: [earendil-works/pi's code at commit e885255](https://github.com/earendil-works/pi/tree/e88525506177d22b6e93029d8f6db1aab323c74a)

### Which was updated more recently, pi or open-webui?

Both got their last push on November 4, 2026.

The proof: [earendil-works/pi's commits on GitHub](https://github.com/earendil-works/pi/commits)

### Which has more commits signed by AI, pi or open-webui?

open-webui: an AI signed 1.3% of its commits, with Claude Code, Aider, Jules, GitHub Copilot, and Cursor; in pi, 0.3%.

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

## Sources

- earendil-works/pi: Read on November 4, 2026, at commit e885255 (https://github.com/earendil-works/pi/tree/e88525506177d22b6e93029d8f6db1aab323c74a)
- open-webui/open-webui: Read on November 4, 2026, at commit c38885a (https://github.com/open-webui/open-webui/tree/c38885a1a737da4968f157092f304f3b5481d0bf)

## 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.