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promptflow vs ray

promptflow and ray share 24 technologies: Flask, FastAPI, azure-storage-blob, pyarrow, flask-cors, starlette, AIOHTTP, uvicorn, SQLAlchemy, azure-identity, pyjwt, cryptography, keyring, nltk, rouge-score, tiktoken, LangChain, jinja2, pillow, strictyaml, jsonschema, azure-core, OpenTelemetry, and psutil. Both are written in Python.

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What they share and what sets them apart

microsoft

promptflow

Build high-quality LLM apps - from prototyping, testing to production deployment and monitoring.

Python11.3kRead on November 12, 2026, at commit 33a68c9What is promptflow built with?

Only in promptflow

In common

ray-project

ray

Ray is an AI compute engine. Ray consists of a core distributed runtime and a set of AI Libraries for accelerating ML workloads.

Python44.3kRead on November 10, 2026, at commit c99c603What is ray built with?

Only in ray

Side by side

SizeLines written by people and agents, without generated ones; code files, without tests.
promptflow325,282 lines written526 code files
ray1,551,053 lines written2,797 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.
promptflow0.1% of its commits signed by AIWith GitHub Copilot
ray3.7% of its commits signed by AIWith Claude Code, Gemini CLI, GitHub Copilot, Cursor, and Codex
ActivityFrom GitHub and its history, on the day SeeRepo read it.
promptflowLast push November 11, 20262,289 commits11,266 stars
rayLast push November 10, 202632,424 commits44,251 stars
TestsThe files that test the code, and the share of code files a test imports.
promptflow717 test files0.6% of its code files have a test that imports them
ray2,192 test files9.5% of its code files have a test that imports them

Frequently asked questions

Which is bigger, promptflow or ray?
ray, with 1,551,053 lines written; promptflow has 325,282.

The proof: ray-project/ray's code at commit c99c603

Which has more GitHub stars, promptflow or ray?
ray, with 44,251 stars; promptflow has 11,266.

The proof: ray-project/ray on GitHub

Which has more tests, promptflow or ray?
ray, with 2,192 test files; promptflow has 717.

The proof: ray-project/ray's code at commit c99c603

Which was updated more recently, promptflow or ray?
promptflow: its last push was on November 11, 2026, and ray's on November 10, 2026.

The proof: microsoft/promptflow's commits on GitHub

Which has more commits signed by AI, promptflow or ray?
ray: an AI signed 3.7% of its commits, with Claude Code, Gemini CLI, GitHub Copilot, Cursor, and Codex; in promptflow, 0.1%.

The proof: the commits each tool signed in ray-project/ray

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