Source: https://seerepo.com/compare/microsoft/data-formulator/vs/run-llama/llama_index
Markdown source: https://seerepo.com/compare/microsoft/data-formulator/vs/run-llama/llama_index.md
Description: data-formulator and llama_index share 17 technologies: psycopg2-binary, pyarrow, DuckDB, azure-storage-blob, clickhouse-connect, pymysql, Google, AIOHTTP, azure-identity, pyjwt, OpenAI, litellm, scikit-learn, lxml, xlrd, beautifulsoup4, and boto3. data-formulator is written in TypeScript and llama_index in Python.

# data-formulator vs llama_index

data-formulator and llama_index share 17 technologies: psycopg2-binary, pyarrow, DuckDB, azure-storage-blob, clickhouse-connect, pymysql, Google, AIOHTTP, azure-identity, pyjwt, OpenAI, litellm, scikit-learn, lxml, xlrd, beautifulsoup4, and boto3. data-formulator is written in TypeScript and llama_index in Python.

- [microsoft/data-formulator](https://seerepo.com/r/microsoft/data-formulator): 🪄 Data Formulator is an interactive AI-powered data analysis system makes it easy to connect, explore and visualize data.
- [run-llama/llama_index](https://seerepo.com/r/run-llama/llama_index): LlamaIndex is the document processing platform for AI

## What they share and what sets them apart

- In common: psycopg2-binary, pyarrow, DuckDB, azure-storage-blob, clickhouse-connect, pymysql, Google, AIOHTTP, azure-identity, pyjwt, OpenAI, litellm, scikit-learn, lxml, xlrd, beautifulsoup4, boto3
- Only in data-formulator: Vite, React, react-router-dom, Flask, db-dtypes, pymongo, MongoDB, Postgres, azure-cosmos, azure-kusto-data, localforage, flask-cors, MUI, react-dnd, vega-embed, @uiw/react-codemirror, codemirror, D3, react-virtuoso, Vega, allotment, react-dnd-html5-backend, tiptap, tiptap-markdown, vega-lite, @mui/icons-material, azure-keyvault-secrets, oidc-client-ts, flask-session, google-auth, openpyxl, prismjs, react-markdown, exceljs, html2canvas, katex, markdown-to-jsx, remark-gfm
- Only in llama_index: starlette, aiomysql, aiosqlite, async-lru, asyncpg, azure-search-documents, ibm-db, pgvecto-rs, pgvector, psycopg, pyzmq, Redis, weaviate-client, lancedb, oracledb, pymilvus, SQLite, tablestore, chromadb, falkordb, MySQL, pinecone, gcsfs, pyiceberg, pymochow, pyobvector, s3fs, tcvectordb, typesense, ElevenLabs, anyio, graphql-core, tornado, Ray, soupsieve, tinycss2, ipywidgets, matplotlib-inline, prompt-toolkit, matplotlib, Rich, SQLAlchemy, argon2-cffi, google-auth-httplib2, google-auth-oauthlib, cryptography, msal, einops, firecrawl-py, guardrails-ai, llama-index-core, mem0ai, opencv-python, PaddlePaddle, tavily-python, torch, transformers, ibm-watsonx-ai, cohere, LangChain, tiktoken, MCP, sentence-transformers, dashscope, fastembed, flagembedding, nltk, sentencepiece, ModelScope, Ollama, openvino, tritonclient, vLLM, datasets, exa-py, flashrank, hnswlib, langfuse, mlx, mlx-lm, nomic, optimum, paddleocr, peft, presidio-analyzer, tokenizers, bleach, markupsafe, mistune, nbformat, newspaper3k, pillow, bs4, html2text, unstructured, defusedxml, jinja2, pymupdf, filetype, docx2txt, markdownify, docling, lxml-html-clean, markitdown, nbconvert, pdf2image, pdfplumber, pypdf, pypdf2, tinytag, youtube-transcript-api, jsonschema-specifications, marshmallow, referencing, rfc3339-validator, Pydantic, docling-core, annotated-types, jsonschema, pydantic-core, opentelemetry-api, opentelemetry-semantic-conventions, prometheus-client, psutil, python-json-logger, docker, Alibaba Cloud, OpenTelemetry

## Side by side

| | data-formulator | llama_index |
|---|---|---|
| Size | 135,656 lines written, 238 code files | 473,236 lines written, 2,055 code files |
| Who writes it | 3.1% of its commits signed by AI. With GitHub Copilot and Cursor | 0.2% of its commits signed by AI. With Claude Code, Cursor, and GitHub Copilot |
| Activity | Last push November 6, 2026, 1,175 commits, 17,667 stars | Last push November 5, 2026, 7,963 commits, 52,820 stars |
| Tests | 188 test files. 53.4% of its code files have a test that imports them | 1,607 test files. 46.5% 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, data-formulator or llama_index?

llama_index, with 473,236 lines written; data-formulator has 135,656.

The proof: [run-llama/llama_index's code at commit 444fdf0](https://github.com/run-llama/llama_index/tree/444fdf0684707de62ebb447d658dba137dd9cb99)

### Which has more GitHub stars, data-formulator or llama_index?

llama_index, with 52,820 stars; data-formulator has 17,667.

The proof: [run-llama/llama_index on GitHub](https://github.com/run-llama/llama_index)

### Which has more tests, data-formulator or llama_index?

llama_index, with 1,607 test files; data-formulator has 188.

The proof: [run-llama/llama_index's code at commit 444fdf0](https://github.com/run-llama/llama_index/tree/444fdf0684707de62ebb447d658dba137dd9cb99)

### Which was updated more recently, data-formulator or llama_index?

data-formulator: its last push was on November 6, 2026, and llama_index's on November 5, 2026.

The proof: [microsoft/data-formulator's commits on GitHub](https://github.com/microsoft/data-formulator/commits)

### Which has more commits signed by AI, data-formulator or llama_index?

data-formulator: an AI signed 3.1% of its commits, with GitHub Copilot and Cursor; in llama_index, 0.2%.

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

## Sources

- microsoft/data-formulator: Read on November 6, 2026, at commit 5477f0e (https://github.com/microsoft/data-formulator/tree/5477f0e236426dc8f74a498ec400414fba7fbc0f)
- run-llama/llama_index: Read on November 5, 2026, at commit 444fdf0 (https://github.com/run-llama/llama_index/tree/444fdf0684707de62ebb447d658dba137dd9cb99)

## 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.