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AI Toolbox (formerly ChatGPT Toolbox) is one install from the Chrome Web Store with three deep-integration modules. Folders, full-text search, message bookmarks, and exports show up inside chatgpt.com, gemini.google.com, and claude.ai natively. No floating overlay. No copy-paste between tabs. The host site stays the host site; we just give it the productivity layer it should have shipped with.
One install | Free on all 3 modules | All Access Lifetime $149 (saves $148)

The category most people picture when they hear "multi-AI extension" is the sidebar overlay: a floating panel that sits on top of any webpage and lets you ask an AI a question. SideGPT, ChatHub, MaxAI, Monica, and a dozen others fit that shape. They are designed to bring AI to the rest of the web.
AI Toolbox is built the opposite direction. We don't bring AI to other sites; we make the AI sites themselves more usable. The folders panel is inside ChatGPT's actual sidebar. The full-text search bar is inside Gemini's actual chat history. Message bookmarks appear inside Claude's actual conversation view. You stay on the site you came to use, and the site grows new capabilities around you.
Both designs have legitimate use cases. If you want a single floating panel that answers questions on every webpage you visit, pick an overlay tool. If you spend hours per week inside chatgpt.com, gemini.google.com, or claude.ai and you want those sites to organize, search, bookmark, and export their own contents properly, pick AI Toolbox.
The ChatGPT module replaces the sidebar with one that does what a real workspace sidebar does. Folders (with subfolders) live where the chat list used to be. Pinned chats sit at the top with their own group. Smart Tags categorize chats automatically into Coding, Writing, Research, Math, and Business. Message-level Bookmarks let you flag the one assistant reply that mattered in a 40-message thread and color-label it (Final, Important, Reference). A Cmd+Shift+F full-text search box sits at the top of the sidebar. All of it is laid out in ChatGPT's own column grid, not a floating panel.

Gemini ships with chat history but no real search across it. The Gemini module adds a full-text search box that scans every message in every conversation, with an Exact Match toggle for phrase searches, role filters (Questions vs Answers), and time-range filters (Past week, Past month, Past year). Results are message-level, not conversation-level: you see the exact snippet that matched, with the query term highlighted, and one click jumps you to that message in context.

Claude has good search but no way to mark a specific message inside a conversation. The Claude module adds Message Bookmarks: highlight any assistant message, assign a color label (Important, Question, Reference, custom), and add an optional note. The bookmark sits visibly on the message in context, and a Bookmarks view lists every flagged message across every conversation. Folders, full-text search, and export to TXT/Markdown/JSON round out the module so a heavy Claude user has the same workspace tools they have on ChatGPT.

For buyers comparing categories, here is the same workflow expressed two ways:
The two product shapes are complementary, not competing. Many of our customers run AI Toolbox plus a separate overlay tool. We sit on chatgpt.com, gemini.google.com, and claude.ai; the overlay sits on everything else.
Free includes the core of every module on every site: folders (limited count), search, basic bookmarks, single-conversation TXT export, and a prompt library starter pack. Premium unlocks unlimited folders, all export formats (TXT, Markdown, JSON, PDF, ZIP), unlimited bookmarks, prompt chaining (ChatGPT), Voice Download, and the full prompt library.
The math: three per-module Lifetimes cost $297. All Access Lifetime is $149. You save $148 and you're covered for every future module. 14-day money-back guarantee on Premium and Lifetime, subject to refund policy.
One extension, one install from the Chrome Web Store. When you open the popup you get toggles for ChatGPT, Gemini, and Claude. Each module activates only on its target site (chatgpt.com, gemini.google.com, claude.ai), so the UI you see is always native to the site you're on. There is nothing to install separately.
Those tools are floating overlays. They sit on top of any webpage as a panel you can call up to ask an AI a question. AI Toolbox is the opposite design: it injects directly into the host site's own layout. Folders, bookmarks, search, exports, and prompt libraries appear inside ChatGPT's sidebar, inside Gemini's chat history, and inside Claude's conversation list. You're not pasting between windows; you're using the host product with more capability.
Three: chatgpt.com (the ChatGPT module), gemini.google.com (the Gemini module), and claude.ai (the Claude module). Each module is purpose-built for its host. Folders work the same way conceptually, but the implementation is tuned to each site's DOM, message structure, and theming.
Most overlap (folders, full-text search, message bookmarks, Markdown export with YAML frontmatter for Obsidian/Logseq, prompt library). Format coverage varies: ChatGPT exports to TXT/Markdown/JSON/PDF/ZIP, Gemini to TXT/Markdown/JSON/PDF, Claude to TXT/Markdown/JSON. Module-specific features: ChatGPT has Voice Download, Custom Instructions presets, and Prompt Chaining. Gemini has model-aware search filters. Claude has artifact-aware export. Feature parity is a roadmap goal, not a hard rule today.
Chromium-based browsers: Chrome, Edge, Brave, Opera, and Arc. Firefox is not supported, because the Gemini and Claude host sites both rely on Chromium-specific behaviors that we lean on for the deep-integration features.
Free plan covers core features on every module. Premium per module is $9.99/month or $99 one-time Lifetime. If you want everything across all 3 modules forever, All Access Lifetime is $149 (saves $148 versus $99 per module times 3). 14-day money-back guarantee on Premium and Lifetime, subject to refund policy.
Not on All Access Lifetime. The $149 price covers every current and future module. When a new module ships (Perplexity, Mistral, etc.), it unlocks automatically for All Access holders. Per-module Lifetime customers stay on the module they bought.
20,000+ users. 4.5/5 on the Chrome Web Store. One install, three deep-integration modules, free on every module to start. Premium per module at $9.99/month or $99 Lifetime. All Access Lifetime $149 covers everything forever and saves $148.
Want the per-module landing pages instead? See the ChatGPT module, the Gemini module, the Claude module, or jump straight to pricing.