AgentIndex icon
AgentIndex
piia-engram logo
piia-engram
★ 163
vs
zettelforge logo
zettelforge
★ 66

piia-engram vs zettelforge

piia-engram: piia-engram is a local-first AI identity layer that stores your profile, preferences, lessons learned, and key decisions as local JSON files. It exposes them through the MCP protocol so that all compatible AI tools (like Claude Code, Codex, and Cursor) read the same identity, eliminating the need to re-explain yourself across sessions, tool switches, or updates.; zettelforge: ZettelForge provides persistent memory for AI agents with automatic entity extraction, knowledge graph construction, and STIX ontology. It supports offline operation with no API keys or cloud dependencies. It features alias resolution, blended retrieval, and memory evolution for cyber threat intelligence.

01

TL;DR

piia-engram logo
piia-engramMemory & Context · ★ 163

Maintain consistent identity when switching between multiple AI coding tools

Read piia-engram full review →
zettelforge logo
zettelforgeMemory & Context · ★ 66

Persistent memory for AI agents in cyber threat intelligence

Read zettelforge full review →
02

Side-by-Side Comparison

Field
piia-engram logopiia-engram
zettelforge logozettelforge
Category
Memory & Context
Memory & Context
Stars
★ 163
★ 66
License
Apache-2.0
MIT
Install Command
pip install piia-engram && engram setup
pip install zettelforge
Updated
1d ago
1d ago
Open Source
Yes
Yes
Website
↗ Visit
↗ Visit
GitHub
↗ GitHub
↗ GitHub
Tags
ai-agent, ai-identity, ai-memory
ai-agent, claude-code, claude-code-plugin
03

Features

piia-engram logopiia-engram
01Local-first JSON storage under ~/.engram/
02MCP-native — integrates with any MCP-compatible AI tool
03Cross-tool identity persistence across Claude Code, Codex, Cursor, and more
04Knowledge inheritance across projects
05Passive knowledge capture from session summaries
zettelforge logozettelforge
01Entity extraction of CVEs, threat actors, IOCs, MITRE ATT&CK techniques, and more
02Knowledge graph with causal triple inference
03Alias resolution (e.g., APT28 = Fancy Bear)
04Blended retrieval combining vector similarity and graph traversal with intent classification
05Memory evolution with ADD/UPDATE/DELETE/NOOP decisions
04

Use Cases

piia-engram logopiia-engram
↳Maintain consistent identity when switching between multiple AI coding tools
↳Avoid re-explaining preferences and lessons in frequent new AI chat sessions
↳Preserve personal context after AI tool updates or version changes
zettelforge logozettelforge
↳Persistent memory for AI agents in cyber threat intelligence
↳Threat intelligence analysis and knowledge graph building
↳Tracking changes in threat actor tactics and techniques over time
FAQ

FAQ

What is the difference between piia-engram and zettelforge?
Both piia-engram and zettelforge are in the Memory & Context category. piia-engram has 163 stars, while zettelforge has 66 stars.
Which is better, piia-engram or zettelforge?
The best choice depends on your use case. Choose piia-engram if Maintain consistent identity when switching between multiple AI coding tools, and zettelforge if Persistent memory for AI agents in cyber threat intelligence.
Is piia-engram free or open source?
Yes, piia-engram is open source on GitHub (Apache-2.0).
Is zettelforge free or open source?
Yes, zettelforge is open source on GitHub (MIT).
Cloud Infrastructure
Ad

Deploy on DigitalOcean

Host your MCP servers, Docker containers, and AI agents with $200 free credit over 60 days.

Claim $200 Free Credit
→

Related

Alternatives to piia-engram →Alternatives to zettelforge →piia-engram details →zettelforge details →