AI Chatbot Memory Comparison, Which AI Assistants Remember You (2026)

Most people want an AI assistant that remembers their context, their writing style, their project, their preferences, without re-explaining it every chat. Others want the opposite: to know exactly what is stored and how to switch it off. This tool answers both. It compares eight consumer assistants, ChatGPT, Claude, Gemini, Microsoft Copilot, Grok, Meta AI, Perplexity and DeepSeek, across six memory capabilities, using each vendor's documented behaviour.

This is a curated reference, not a calculator. The logic is careful data curation plus deterministic boolean filtering, no server call, no opinion, only what each vendor documents. Each assistant is one record with six capability fields, and every field is defined precisely so results are reproducible:

• Cross-session, information from one chat is available in a different, new chat.
• Auto-recall of history, the assistant can automatically reference the content of past chats, not just facts you explicitly saved.
• View / edit / delete. There is a settings screen to see and remove individual memories.
• Free tier, the memory feature works without a paid plan.
• Can disable. There is a global switch to stop it remembering you.
• Trains on your data, shown separately, because remembering you and training the underlying model are different things.

Each cell is one of three states: Yes (documented and available on the stated plan), Partial (limited, for example saved facts only, or the fuller version is paid) or No. When you tick filters, an assistant matches only if every ticked field is a full Yes, a Partial deliberately does not qualify, because a half-answer should not be sold as a full one. The match rule is a plain boolean AND: filters.every(f => assistant[f] === "yes"). With no filters ticked, every assistant matches and you see the full table.

The match count is computed two independent ways in the data module, once with Array.filter().length and once with a reduce accumulator, and both agree for every filter combination, a small guard against a logic slip. Because memory features change so often, the dataset carries a 2026-07-18 verification date and each row links to its primary vendor source for re-checking. The dataset covers consumer plans only; enterprise/team memory-admin controls and country-by-country availability are out of scope.

One primary vendor page per assistant. Each row in the tool links to the same source so you can re-check a single cell.

• ChatGPT: OpenAI Help, Memory FAQ
• Claude: Claude Help, chat search & memory
• Gemini: Gemini Apps Help, memory of past chats
• Microsoft Copilot: Microsoft, Copilot privacy controls
• Grok: xAI, About Grok
• Meta AI: Meta Help, remember details about you
• Perplexity: Perplexity, AI assistants with memory
• DeepSeek: DeepSeek, official site

Last cross-checked against these sources on 2026-07-18. Memory features ship and change often; this page is reviewed on a rolling basis and whenever a vendor announces a change.