Compare
mem0 vs sim
mem0 and sim share 8 technologies: FastAPI, Postgres, Redis, MongoDB, OpenAI, PostHog, Anthropic, and AWS S3. mem0 is written in Python and sim in TypeScript.
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?simstudioai
sim
Sim is the collaborative workspace to build, deploy, and monitor AI agents and workflows. Used by 100,000+ builders.
TypeScript30kRead on November 2, 2026, at commit df7709bWhat is sim built with?In common
Only in mem0
Only in sim
Side by side
mem0sim
SizeLines written by people and agents, without generated ones; code files, without tests.
mem0234,363 lines written636 code files
sim4,073,540 lines written10,948 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
sim5.3% of its commits signed by AIWith Claude Code, Cursor, and Codex
ActivityFrom GitHub and its history, on the day SeeRepo read it.
mem0Last push October 29, 20262,650 commits68,064 stars
simLast push November 2, 20268,178 commits29,966 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
sim3,682 test files38.4% of its code files have a test that imports them
Frequently asked questions
Which is bigger, mem0 or sim?
sim, with 4,073,540 lines written in 10,948 code files; mem0 has 234,363 in 636.
The proof: simstudioai/sim's code at commit df7709b
Which has more GitHub stars, mem0 or sim?
mem0, with 68,064 stars; sim has 29,966.
The proof: mem0ai/mem0 on GitHub
Which has more tests, mem0 or sim?
sim, with 3,682 test files; mem0 has 324.
The proof: simstudioai/sim's code at commit df7709b
Which was updated more recently, mem0 or sim?
sim: its last push was on November 2, 2026, and mem0's on October 29, 2026.
The proof: simstudioai/sim's commits on GitHub
Which has more commits signed by AI, mem0 or sim?
sim: an AI signed 5.3% of its commits, with Claude Code, Cursor, and Codex; in mem0, 3.6%.
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