letta logo
letta
★ 25.2k
vs
Zengram logo
Zengram
★ 64

letta vs Zengram

letta: Letta is a powerful platform for building stateful AI agents equipped with advanced memory, enabling them to learn and self-improve over time. It provides both a command-line interface for local agent execution and a comprehensive API with Python and TypeScript SDKs for seamless integration into applications.; Zengram: Zengram is a shared memory system for multi-agent AI systems, enabling agents to store and retrieve memories across machines. It features typed memory, dual storage (Qdrant + SQLite/Postgres), multi-path search, and cross-agent capabilities like briefings and corroboration. Self-hosted, open-source, with MCP server and SDKs.

01

TL;DR

letta logo
lettaMemory & Context · ★ 25.2k
When to choose:
  • You want a long-lived agent that remembers past work and rewrites its own memory and context over time.
  • You want one agent reachable from CLI, desktop, browser, mobile and messaging apps, with subagents, schedules and hooks.
  • You want memory you can inspect: the README says context is tracked in git and can sync to your own repository.
When to skip:
  • You only need to add memory to an agent you already use through MCP; a small MCP memory server is a lighter fit.
  • You rely on older Letta tutorials or the V1 API server: the project restructured, and the V1 server is retired.
  • You want everything to work without signing in: Letta Cloud is the default backend and some features need it.
Zengram logo
ZengramMemory & Context · ★ 64

Cross-agent memory sharing across different machines

02

Side-by-Side Comparison

Field
letta logoletta
Zengram logoZengram
Category
Memory & Context
Memory & Context
Stars
★ 25.2k
★ 64
License
Apache-2.0
MIT
Install Command
npm install -g @letta-ai/letta-code
git clone https://github.com/ZenSystemAI/zengram.git && cd zengram && cp .env.example .env && docker compose up -d
Updated
5d ago
1d ago
Open Source
Yes
Yes
Tags
Stateful AI, Agent Platform, Advanced Memory
claude, claude-ai, claude-code
03

Features

letta logoletta
01Build stateful AI agents with advanced memory
02Agents capable of learning and self-improvement over time
03CLI tool for running agents locally in your terminal
04Comprehensive API for integrating agents into applications
05Support for skills and subagents; fully model-agnostic
Zengram logoZengram
01Typed memory: events, facts, statuses, decisions
02Dual storage with semantic and structured search
03Multi-path search (vector, BM25, entity graph) with RRF fusion
04Cross-agent capabilities: briefings, corroboration, credential scrubbing
05Self-hosted, open-source, with MCP server and SDKs
04

Use Cases

letta logoletta
↳Running AI agents locally in your terminal for coding and general tasks.
↳Integrating stateful AI agents into custom applications using the API and SDKs.
↳Developing self-improving AI systems that adapt and learn continually.
Zengram logoZengram
↳Cross-agent memory sharing across different machines
↳Session reflection and context retrieval for agents
↳Logging memories from automation tools (e.g., n8n) for AI agents
05

Best For

letta logoletta
Most PopularEssentialTrending
Zengram logoZengram
—
FAQ

FAQ

What is the difference between letta and Zengram?
Both letta and Zengram are in the Memory & Context category. letta has 25.2k stars, while Zengram has 64 stars.
Which is better, letta or Zengram?
The best choice depends on your use case. Choose letta if Running AI agents locally in your terminal for coding and general tasks., and Zengram if Cross-agent memory sharing across different machines.
Is letta free or open source?
Yes, letta is open source on GitHub (Apache-2.0).
Is Zengram free or open source?
Yes, Zengram is open source on GitHub (MIT).
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