For Multi-AI Power Users

One AI memory. Six platforms. Every device.

Different AI models are good at different things — but every time you switch from ChatGPT to Claude, or Claude to Gemini, you start completely from scratch. Rethread is a privacy-first Chrome extension that builds one shared memory across all six major AI platforms, then syncs it end-to-end encrypted across every device you own.

Free forever · No account required · Works in Chrome, Edge, Brave, Arc · Zero-knowledge sync available

Add to Chrome — Free

The "switch tax" between AI platforms

Most serious AI users don't pick one chatbot — they switch between several depending on the task. ChatGPT for general work, Claude for long-form reasoning, Gemini for Google integration, Grok for live X/Twitter context, Perplexity for research, DeepSeek for code. Each has its own strengths.

But each platform also has its own memory silo. The detailed system architecture you explained to ChatGPT? Claude has never heard of it. The coding conventions you spent ten messages establishing in Claude? Gemini will ask all over again.

Every AI switch costs you 2–10 minutes of re-explaining your stack, your role, and your project. Across a busy week that's literally hours of repeated context — and the AI is still working at half capacity because it doesn't have the full picture.

Rethread builds one memory layer across all six platforms

Instead of relying on each AI's built-in (or non-existent) memory, Rethread runs as a Chrome extension that watches your conversations on the page itself, extracts structured memories, and stores them in your browser's local IndexedDB.

The result: a single, unified memory store that's identical no matter which AI you're using.

ChatGPT

chatgpt.com

Claude

claude.ai

Gemini

gemini.google.com

Grok

grok.com

Perplexity

www.perplexity.ai

DeepSeek

chat.deepseek.com

How cross-platform memory actually works

1. Capture happens on the page where you're chatting.

Whichever AI you're using, Rethread reads conversation content from the DOM — the same content already visible to you in the browser — and runs a lightweight extractor that distills it into four memory types: Facts, Preferences, Decisions, and Context.

2. Storage is identical across platforms.

Every memory ends up in the same IndexedDB store, tagged with the source platform (so you can filter "show me everything I told Claude about my React project"), the original conversation ID, and your custom buckets / folders / tags.

3. Recall works the same on every platform.

Alt+Shift+R on any of the six AI domains opens Selective Recall. Pick which memories to inject — same UI, same data, same hotkey. The injected context block adapts its formatting to whichever AI you're feeding it to.

4. Cross-conversation quote search.

Pro users can search not just structured memories but every captured message body — across all conversations on all six platforms. Find "that thing you said three weeks ago in some Claude session" in seconds.

Cross-device sync (zero-knowledge, optional)

A unified memory across platforms is great. A unified memory across platforms and across your laptop, work computer, and home machine is the real win.

Rethread Pro includes optional end-to-end encrypted cloud sync built on Cloudflare Workers + R2:

Read the deep dive on Rethread's zero-knowledge cloud sync architecture →

Real workflows that benefit most

Engineers using multiple AIs for code review and architecture

Claude for long-context code review, ChatGPT for quick generation, DeepSeek for tricky algorithm questions, Gemini for Google Cloud / Firebase questions. With Rethread, all four know your stack, your conventions, your in-progress tickets, and your team's decisions — without you re-typing any of it.

Researchers and analysts

Perplexity to find sources, Claude to synthesize, ChatGPT to draft, Gemini to fact-check via Google. Memories about your research questions, citation conventions, and previously-explored leads stay with you across the whole pipeline.

Writers running drafts through multiple models

Style preferences, character bibles, world-building notes, and editor feedback live in one bucket. Switch from ChatGPT to Claude to Grok mid-draft without losing a beat.

Anyone who ever opened a "fresh" chat and groaned

If you've ever started a new ChatGPT conversation and immediately copy-pasted the same context block from a Notion doc or a saved prompt — Rethread automates exactly that, but smarter.

Frequently asked questions

Do all six AI platforms share the same memory pool?
Yes. There's a single memory database in your browser. Memories captured in ChatGPT are immediately searchable, recallable, and injectable in Claude, Gemini, Grok, Perplexity, and DeepSeek — and vice versa. Each memory is tagged with its source platform so you can filter if you want.
What if a memory is specific to one platform (e.g. ChatGPT's tone)?
Tag it. Rethread supports custom tags and color-coded buckets. You can keep platform-specific memories in their own bucket and exclude them from recall on other platforms. Selective Recall lets you check / uncheck individual memories before injecting.
Will it slow down ChatGPT, Claude, etc.?
Rethread is engineered for negligible overhead. Capture runs as a debounced background extractor; recall only triggers when you explicitly press the hotkey or click the Recall button. We don't intercept network requests or modify the AI's UI beyond a small button.
Can I sync between Chrome, Edge, and Arc?
Yes — any Chromium-based browser works. Install Rethread, activate the same Pro license, and enable Cloud Sync with the same passphrase. Memories sync end-to-end encrypted across all of them.
Does it work on Firefox or Safari?
Not yet — Rethread currently ships as a Chrome / Chromium extension. Firefox and Safari support are on the roadmap. Subscribe to release notes inside the extension to be notified.
Is cross-platform sync free?
Cross-platform memory capture and recall on a single device is free forever, including for all six platforms. Cross-device end-to-end encrypted cloud sync is a Pro feature ($6.99/mo or $49 lifetime).

One memory. Every AI you use.

Install Rethread free and stop starting from scratch with every platform.

Add to Chrome — Free

Related reading