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.