pmb
★ 287
vs
ontology-atlas
★ 144
pmb vs ontology-atlas
pmb: PMB gives Claude Code, Cursor, Codex and other MCP-aware agents a persistent memory kept in one SQLite file on your disk. It offers 29 MCP tools, needs no API keys or subscription, and makes no LLM call on the read path.; ontology-atlas: Ontology Atlas helps you understand what your codebase builds, why it is structured that way and what a change will affect. It uses one shared Markdown ontology for humans and coding agents, visualized for people.
01
TL;DR
pmbMCP Servers · ★ 287
Give a coding agent memory of last week's decisions
ontology-atlasMCP Servers · ★ 144
Assess what a code change could affect
02
Side-by-Side Comparison
Field
pmbontology-atlasCategory
MCP Servers
MCP Servers
Stars
★ 287
★ 144
License
Apache-2.0
MIT
Install Command
pip install pmb-ai
git clone https://github.com/wlsdks/ontology-atlas ~/tools/ontology-atlas
Updated
1mo ago
2d ago
Open Source
Yes
Yes
Tags
ai-agents, ai-memory, bm25
ai-agents-framework, claude-code, code-visualization
03
Features
pmb0129 MCP tools for storing and recalling decisions, lessons, facts and project structure
02Memories survive restarts, model upgrades and agent switches
03Local-first with no cloud, and multilingual
ontology-atlas01Markdown-only knowledge base that humans and coding agents share
02Desktop app for macOS, with a Windows x64 beta
03Sample vault included for an online store
04
Use Cases
pmb↳Give a coding agent memory of last week's decisions
↳Share one memory across Claude Code, Cursor and Codex
ontology-atlas↳Assess what a code change could affect
↳Give coding agents shared context about a project's structure
FAQ
FAQ
What is the difference between pmb and ontology-atlas?
Both pmb and ontology-atlas are in the MCP Servers category. pmb has 287 stars, while ontology-atlas has 144 stars.
Which is better, pmb or ontology-atlas?
The best choice depends on your use case. Choose pmb if Give a coding agent memory of last week's decisions, and ontology-atlas if Assess what a code change could affect.
Is pmb free or open source?
Yes, pmb is open source on GitHub (Apache-2.0).
Is ontology-atlas free or open source?
Yes, ontology-atlas is open source on GitHub (MIT).
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