Side Space (officially also known as Side Copilot) is a Chrome browser extension designed to use the previously unused area of the browser sidebar to provide tab management and AI assistance. It is aimed at creators, productivity enthusiasts, and professionals, helping users reduce browsing burden and improve work efficiency.
Purpose and Positioning The core purpose of Side Space is browser tab management and AI-assisted browsing. It places a vertical tab manager on the side of the screen, making it easier to scan, identify, and switch tabs. At the same time, it integrates an AI assistant (Side Copilot) into the sidebar, allowing users to conduct research, organize, and automate operations without interrupting their browsing flow.
Main Capabilities
- Vertical tab management: Displays open tabs in a vertical layout in the browser sidebar, making them easy to view and switch between.
- Spaces: Organizes tabs by themes such as work, life, and hobbies into different spaces within the same window, allowing users to focus on one space at a time.
- Cross-browser/device sync: Automatically saves created spaces, and after logging into an account, they can be synced across different browsers or devices, supporting Chrome, Edge, Brave, Vivaldi, Sigma, Comet, Firefox, Zen, and more.
- Chat with open tabs (Chat Mode): The AI understands the context of currently open tabs and can answer questions about these tabs.
- Agent Mode: The AI agent can perform browser automation operations, such as grouping tabs, managing windows, searching browsing history, researching topics, and more.
- Other advanced tools (Pro+): Including cross-page agents, multi-tab chat, a Reddit post search tool, a mind map generation tool, a YouTube video chat tool, and chat tools for PDF/Docs/Word/Excel/PPT/image files.
How to Use Side Space is a Chrome browser extension. After installation, it provides vertical tab management and the Side Copilot AI assistant in the browser sidebar. Users need to log in with an account to unlock all features. The free version allows creating up to 5 spaces and using free AI chat for the current page; the Pro version provides unlimited spaces, cloud sync, Agent Mode, page agents, and more; the Pro+ version further provides cross-page agents, multi-tab chat, and a variety of specialized tools. In addition, Pro and above support BYOK (bringyour own key) to access AI models from various providers. A full refund can be requested within 7 days after purchase.
Use Cases
- Users with too many tabs who need efficient organization and switching.
- Users who want to manage browsing content by themes such as work, life, and hobbies.
- Users who need to quickly research, summarize, or ask about the content of current tabs while browsing.
- Advanced users who want to automate browser operations through AI (such as grouping, window management, and history search).
- Users who need to sync tab spaces across browsers/devices.
Limitations and Notes Some advanced features require a paid subscription, and the benefits differ by version: the free version supports up to 5 spaces and only current-page AI chat; the Pro version adds unlimited spaces, cloud sync, Agent Mode, and page agents; the Pro+ version adds cross-page agents, multi-tab chat, and a variety of additional tools. Some tools (such as history/session/bookmark tools) require authorization. The refund policy is a full refund within 7 days after purchase. Information about whether the free version will be offered long term, specific pricing amounts, and detailed system requirements is not provided in the materials.
