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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.

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What they share and what sets them apart

microsoft

data-formulator

🪄 Data Formulator is an interactive AI-powered data analysis system makes it easy to connect, explore and visualize data.

TypeScript17.7kRead on November 6, 2026, at commit 5477f0eWhat is data-formulator built with?

Only in data-formulator

In common

run-llama

llama_index

LlamaIndex is the document processing platform for AI

Python52.8kRead on November 5, 2026, at commit 444fdf0What is llama_index built with?

Only in llama_index

Side by side

SizeLines written by people and agents, without generated ones; code files, without tests.
data-formulator135,656 lines written238 code files
llama_index473,236 lines written2,055 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.
data-formulator3.1% of its commits signed by AIWith GitHub Copilot and Cursor
llama_index0.2% of its commits signed by AIWith Claude Code, Cursor, and GitHub Copilot
ActivityFrom GitHub and its history, on the day SeeRepo read it.
data-formulatorLast push November 6, 20261,175 commits17,667 stars
llama_indexLast push November 5, 20267,963 commits52,820 stars
TestsThe files that test the code, and the share of code files a test imports.
data-formulator188 test files53.4% of its code files have a test that imports them
llama_index1,607 test files46.5% of its code files have a test that imports them

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

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

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

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

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

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