ChatPDF ➜ GPT4 128k Sidebar Chrome Extension
A browser hub bundling 100+ GPT-4 agents and copilots into bar, window or full-screen views.
At a glance
Starts at
Free
No paid plan found on the Chrome Web Store, September 2026.
Free tier
Yes
Platforms
Chrome
Best for
Power users wanting many AI agents in one hub
Not for
Users in Iran, Afghanistan, North Korea or mainland China email accounts
3.4 out of 5
Scored by a Toolio reviewer after real useOur verdict
Boss Hub packs more than 100 GPT-4 powered agents and copilots into one browser plugin, switchable between a bar, a window or a full-screen layout. It draws on GPT-4, ChatGPT and Microsoft Azure AI alongside its own add-ons. Access is not supported in Iran, Afghanistan or North Korea, and mainland China email providers like QQ and 163 aren't supported either.
✓What it does well
Many built-in agentsBundles over 100 GPT-4 agents and copilots in one hub.
Flexible display modesSwitches between bar, window and full-screen layouts.
Multiple AI backendsDraws on GPT-4, ChatGPT and Microsoft Azure AI together.
✕Where it falls short
Regional restrictionsDoes not support access from Iran, Afghanistan or North Korea.
Email restrictionsDoes not support mainland China email providers like QQ or 163.
Mixed ratingsAverages only 3.4 out of 5 across its ratings.
Key features
Multi-agent hubHosts 100+ AI agents and copilots in one place.
Multiple AI modelsRuns on GPT-4, ChatGPT and Microsoft Azure AI.
Add-on ecosystemIncludes 7+ built-in AI add-ons and copilots.
Adjustable layoutDisplays as a bar, floating window or full screen.