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mcp vs ray

mcp and ray share 22 technologies: pymongo, pyarrow, MongoDB, pyiceberg, daft, FastAPI, starlette, uvicorn, sqlglot, jinja2, beautifulsoup4, defusedxml, lxml, ruamel-yaml, openapi-spec-validator, Pydantic, docker, python-json-logger, botocore, boto3, kubernetes, and psutil. Both are written in Python.

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What they share and what sets them apart

awslabs

mcp

Open source MCP Servers for AWS

Python9.9kRead on November 14, 2026, at commit 5d58a6aWhat is mcp built with?

Only in mcp

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 13, 2026, at commit de4c576What is ray built with?

Only in ray

Side by side

SizeLines written by people and agents, without generated ones; code files, without tests.
mcp970,557 lines written1,184 code files
ray1,566,356 lines written2,810 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.
mcp2.4% of its commits signed by AIWith Claude Code, GitHub Copilot, and Codex
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.
mcpLast push November 13, 20262,089 commits9,918 stars
rayLast push November 13, 202632,468 commits44,282 stars
TestsThe files that test the code, and the share of code files a test imports.
mcp1,401 test files77.6% of its code files have a test that imports them
ray2,208 test files9.4% of its code files have a test that imports them

Frequently asked questions

Which is bigger, mcp or ray?
ray, with 1,566,356 lines written; mcp has 970,557.

The proof: ray-project/ray's code at commit de4c576

Which has more GitHub stars, mcp or ray?
ray, with 44,282 stars; mcp has 9,918.

The proof: ray-project/ray on GitHub

Which has more tests, mcp or ray?
ray, with 2,208 test files; mcp has 1,401.

The proof: ray-project/ray's code at commit de4c576

Which was updated more recently, mcp or ray?
Both got their last push on November 13, 2026.

The proof: awslabs/mcp's commits on GitHub

Which has more commits signed by AI, mcp or ray?
ray: an AI signed 3.7% of its commits, with Claude Code, Gemini CLI, GitHub Copilot, Cursor, and Codex; in mcp, 2.4%.

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

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