AgentIndex icon
AgentIndex
pmb logo
pmb
★ 287
vs
ChatCrystal logo
ChatCrystal
★ 61

pmb vs ChatCrystal

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.; ChatCrystal: ChatCrystal collects conversations from AI coding tools, distills them into structured notes with LLMs, and builds a local searchable knowledge base from your real problem-solving history. It supports multiple sources like Claude Code, Cursor, Codex CLI, Trae, and GitHub Copilot, and offers desktop app, CLI, and Docker deployment options.

01

TL;DR

pmb logo
pmbMCP Servers · ★ 287

Give a coding agent memory of last week's decisions

Read pmb full review →
ChatCrystal logo
ChatCrystalMemory & Context · ★ 61

Personal knowledge management for developers to revisit AI-assisted problem-solving experiences.

Read ChatCrystal full review →
02

Side-by-Side Comparison

Field
pmb logopmb
ChatCrystal logoChatCrystal
Category
MCP Servers
Memory & Context
Stars
★ 287
★ 61
License
Apache-2.0
Apache-2.0
Install Command
pip install pmb-ai
npm install -g chatcrystal
Updated
1mo ago
2d ago
Open Source
Yes
Yes
Website
↗ Visit
↗ Visit
GitHub
↗ GitHub
↗ GitHub
Tags
ai-agents, ai-memory, bm25
agent-skills, ai-memory, ai-tools
03

Features

pmb logopmb
0129 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
ChatCrystal logoChatCrystal
01Import AI coding conversations from local tool data directories.
02Distill conversations into structured notes with titles, summaries, conclusions, snippets, and tags.
03Search knowledge semantically with embeddings and relation-aware result expansion.
04Build a knowledge graph across related notes and decisions.
05Expose CLI and MCP tools so agents can recall and write back reusable experience.
04

Use Cases

pmb logopmb
↳Give a coding agent memory of last week's decisions
↳Share one memory across Claude Code, Cursor and Codex
ChatCrystal logoChatCrystal
↳Personal knowledge management for developers to revisit AI-assisted problem-solving experiences.
↳Team knowledge sharing by importing conversations from multiple tools and building a shared knowledge base.
↳Enhancing AI agents with memory of past solutions via CLI and MCP integrations.
FAQ

FAQ

What is the difference between pmb and ChatCrystal?
Both pmb and ChatCrystal are in the MCP Servers category. pmb has 287 stars, while ChatCrystal has 61 stars.
Which is better, pmb or ChatCrystal?
The best choice depends on your use case. Choose pmb if Give a coding agent memory of last week's decisions, and ChatCrystal if Personal knowledge management for developers to revisit AI-assisted problem-solving experiences..
Is pmb free or open source?
Yes, pmb is open source on GitHub (Apache-2.0).
Is ChatCrystal free or open source?
Yes, ChatCrystal is open source on GitHub (Apache-2.0).
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Related

Alternatives to pmb →Alternatives to ChatCrystal →pmb details →ChatCrystal details →