Compare AI Agent Memory Tools
ContxOS side by side with Claude memory, ChatGPT memory, Mem0, Zep, Letta and markdown memory files, capability by capability, with sources.
AI Agent Memory Tools Compared (2026): ContxOS, Claude, ChatGPT, Mem0 and Zep
A side-by-side look at how the major AI memory options store, retrieve and maintain knowledge — assistant memory, memory APIs, and project knowledge bases — with sources.
Updated September 29, 2026
ContxOS vs Claude Memory, Projects and Managed Agents Memory
Claude now has memory in its apps, per-project memory, a memory tool in the API and memory stores for Managed Agents. Here is how each compares with a ContxOS knowledge base.
Updated September 29, 2026
ContxOS vs ChatGPT Memory and Projects
ChatGPT memory personalizes your chats and now rewrites itself in the background. ContxOS keeps a typed project record that any MCP agent can search. How they compare.
Updated September 29, 2026
ContxOS vs Mem0: Project Knowledge Base or Memory API?
Mem0 extracts facts from conversations for developers and now ships an MCP server and weekly Dream consolidation. ContxOS keeps typed decisions, handoffs and workflows. Compared.
Updated September 29, 2026
ContxOS vs Zep: Temporal Knowledge Graph or Project Knowledge Base?
Zep builds temporal context graphs for enterprise agents and shipped a Memory MCP server in August 2026. ContxOS keeps typed decisions, handoffs and workflows. Side by side.
Updated September 29, 2026
ContxOS vs Letta: Memory for Your Existing Agent, or a Platform for Stateful Agents?
Letta is a platform for building stateful agents with git-backed memory files. ContxOS adds a shared project memory to the agents you already use. How they differ.
Updated September 29, 2026
ContxOS vs CLAUDE.md, AGENTS.md and Markdown Memory Files
Markdown memory files are free, local and simple, and they stop scaling once a project’s history outgrows what fits in every prompt. When to keep them and when to add a knowledge base.
Updated September 29, 2026