Open-source alternatives to ChatGPT memory

I want to pick an open-source replacement for ChatGPT memory. Below is a list from Open Source Everything (CC BY-SA 4.0), in the order its website shows it. The order is a starting point, not a verdict. - claude-mem: Claude-Mem is a tool that keeps notes on what an AI coding assistant did during past sessions, so it can pick up where it left off later. It is mainly for programmers who use Claude Code and similar AI coding tools. [Advanced setup; Windows · Mac · Linux; replaces fully; Apache-2.0; https://github.com/thedotmack/claude-mem] - Basic Memory: Basic Memory is a free tool that stores your notes and knowledge as plain Markdown files on your own computer, so an AI assistant can read, write, and search them. It is for people who use AI assistants like Claude or ChatGPT and want the AI to remember past work across sessions. [Advanced setup; Windows · Mac · Linux; replaces fully; AGPL-3.0; https://github.com/basicmachines-co/basic-memory] - Mem0: Mem0 is a memory layer that lets AI assistants and agents remember past conversations, preferences and facts so they can respond with personal context. It is aimed at developers and companies building chatbots, support tools and autonomous AI agents. [Advanced setup; runs on a server you set up; replaces partly; Apache-2.0; https://github.com/mem0ai/mem0] - Letta: Letta is a set of tools for building AI helpers that remember things over time, such as past conversations and decisions. It is aimed at developers and people who want to run their own AI agents with lasting memory, including through a terminal, a browser, or chat apps like Slack. [Advanced setup; In your browser; replaces partly; Apache-2.0; https://github.com/letta-ai/letta] - Graphiti: Graphiti is an open-source Python framework that developers use to build systems which store facts and how they change over time, linked to their source data. It is meant for programmers building their own AI applications, not for everyday users. [Advanced setup; runs on a server you set up; replaces partly; Apache-2.0; https://github.com/getzep/graphiti] Setup rating: "Easy setup" means you can install it like a normal app, use it in a browser. "Advanced setup" means you must run it on your own server or use the command line, or it is a tool for developers. Full details: https://opensourceeverything.org/data/groups/agent-memory.json Before recommending anything, ask me these three questions (one at a time, in plain words): 1) Which device or devices will I use it on (Windows, Mac, Linux, Android, iPhone)? 2) How comfortable am I with technical setup: only installing apps from a store, happy to follow a step-by-step guide, or comfortable with servers and the command line? 3) What is my budget: free only, or willing to pay for hosting or support? Then recommend one to three projects from this list only, and for each say why, using how fully it replaces the app, its setup rating, and the devices it runs on. If nothing on the list fits me, say so plainly instead of stretching.

Read the list of open-source projects at https://opensourceeverything.org/data/groups/agent-memory.json. Compare it with my project or idea below. Tell me which projects overlap, what I could reuse instead of rewriting, and what mine does that none of them do. My project or idea: