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Memory tools that work with ChatGPT
Every tool below names ChatGPT in its own documentation. That's what the vendor says, not something we tested. Each page links to the source.
6 tools · docs checked 2026-11-09
| Tool | Works with (per docs) | Runs | Transport | License |
|---|---|---|---|---|
| MCP Memory Service (doobidoo) Persistent memory for agent pipelines and chat clients: REST API, knowledge graph and autonomous consolidation, with remote MCP over OAuth. | Claude Desktop, Claude Code, Claude (web), ChatGPT, Cursor, Codex, VS Code / Copilot, Windsurf, Gemini CLI, Zed, OpenCode | Local or hosted | stdio, Streamable HTTP | Apache-2.0 |
| LongMemory (CaviraOSS, formerly OpenMemory) moved Local persistent memory store with MCP, HTTP API and session import from many coding agents. | ChatGPT, Claude Code, Codex, VS Code / Copilot, Gemini CLI, Cline, OpenCode | Runs locally | stdio, Streamable HTTP | Apache-2.0 |
| Basic Memory Notes-as-memory: your AI reads and writes plain Markdown files you can open in Obsidian, indexed locally. | ChatGPT, Claude Desktop, Claude Code, Cursor, Codex, VS Code / Copilot | Local or hosted | stdio, Streamable HTTP | AGPL-3.0 |
| MemoryPlugin Hosted shared memory across ChatGPT, Claude, Cursor and 20+ AI tools via browser extension, apps and a remote MCP server; paid, with a 7-day trial. | ChatGPT, Claude (web), Claude Desktop, Claude Code, Cursor, Codex | Hosted | Streamable HTTP, SSE | Proprietary |
| memU Personal memory across agents, with CLIs (including a Codex CLI) and hosted or local storage. | ChatGPT, Claude Code, Cursor, Codex, VS Code / Copilot | Local or hosted | Unknown | Unknown |
| Zep Hosted context layer for agents (Zep Cloud). The GitHub repo holds examples and integrations, not the service. | Claude Desktop, ChatGPT, Claude Code, Codex, Cursor | Hosted | Unknown | Apache-2.0 |
Client support is what each vendor's docs say. MemoryStack doesn't test tools. How to share one memory across your bots.