letta vs zenii
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.; zenii: Zenii is a local daemon that provides a shared AI backend for desktop apps, CLI tools, TUI, scripts, and MCP clients. It offers persistent memory, provider routing, and tool execution via a REST API on localhost:18981. Built with Rust/Tauri, it supports multiple AI providers and includes tools like MCP server and client.
TL;DR
- 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.
- 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.
Local automations requiring shared memory across scripts and tools
Side-by-Side Comparison
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