Compare
mem0 vs ray
mem0 and ray share 3 technologies: FastAPI, Redis, and MongoDB. Both are written in Python.
What they share and what sets them apart
mem0ai
mem0
The Memory Layer for AI Agents - Drop-in memory infrastructure for AI agents and apps. Context that persists. Built for production.
Python68.1kRead on October 30, 2026, at commit 26cdefbWhat is mem0 built with?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.
Python44.2kRead on October 31, 2026, at commit 45c4123What is ray built with?In common
Only in mem0
Only in ray
Google- Google Cloud Storage
Side by side
mem0ray
SizeLines written by people and agents, without generated ones; code files, without tests.
mem0234,363 lines written636 code files
ray1,514,135 lines written2,949 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.
mem03.6% of its commits signed by AIWith Claude Code and Cursor
ray3.3% 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.
mem0Last push October 29, 20262,650 commits68,064 stars
rayLast push October 31, 202632,244 commits44,168 stars
TestsThe files that test the code, and the share of code files a test imports.
mem0324 test files46.2% of its code files have a test that imports them
ray2,145 test files9.1% of its code files have a test that imports them
Frequently asked questions
Which is bigger, mem0 or ray?
ray, with 1,514,135 lines written in 2,949 code files; mem0 has 234,363 in 636.
The proof: ray-project/ray's code at commit 45c4123
Which has more GitHub stars, mem0 or ray?
mem0, with 68,064 stars; ray has 44,168.
The proof: mem0ai/mem0 on GitHub
Which has more tests, mem0 or ray?
ray, with 2,145 test files; mem0 has 324.
The proof: ray-project/ray's code at commit 45c4123
Which was updated more recently, mem0 or ray?
ray: its last push was on October 31, 2026, and mem0's on October 29, 2026.
The proof: ray-project/ray's commits on GitHub
Which has more commits signed by AI, mem0 or ray?
mem0: an AI signed 3.6% of its commits, with Claude Code and Cursor; in ray, 3.3%.
The proof: the commits each tool signed in mem0ai/mem0
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