SideSpace: Vertical Tab Manager for Chrome

SideSpace is a Chrome extension that combines a vertical tab manager with an AI assistant in the browser side panel. It helps users organize tabs into focused spaces, search and group open pages, and automate selected browser-management tasks without leaving the current window.

What it does

SideSpace, presented on its official site as Side Copilot, places open tabs in a vertical sidebar so they can be scanned, identified, and switched between more easily. Users can create separate Spaces for areas such as work, shopping, study, social media, or personal browsing, then focus on one Space at a time in the same browser window.

Its Chat Mode can work with the current page or open tabs, while Agent Mode can perform browser-management actions such as grouping tabs, managing windows, searching browser history, and researching topics. Some tools require authorization, including history, session, and bookmark tools.

Notable capabilities

• Vertical tab management with tab search, pinning, multi-tab selection, tab suspension, and duplicate-tab removal.
• Spaces with cloud sync across supported browsers and devices, including Chrome, Edge, Brave, Vivaldi, Sigma, Comet, Firefox, and Zen.
• Tab organization by domain, custom Group Guard patterns, or AI-generated categories.
• Save and restore tab groups, move tabs or groups to new windows, and copy Space URLs in Markdown, text, or JSON formats.
• AI chat and browser agents, with higher plans adding features such as multi-tab chat, mind-map generation, YouTube video chatting, and file chatting.

Who it helps

The tool is aimed at people who regularly work with many browser tabs and want a persistent side-panel workspace rather than a separate tab-management page. It may fit researchers, students, professionals, and users who divide browsing into recurring work, personal, shopping, or hobby contexts. The site says the extension is used by creators, productivity enthusiasts, and professionals, but does not provide independent performance measurements.

How it fits a workflow

A typical workflow is to create a Space for a project, collect related pages there, and use search, pinning, grouping, or AI categorization to reduce tab clutter. Spaces can be saved and synchronized, while tab groups can be restored later. Users who need automation can use Agent Mode for supported tab, group, window, history, or bookmark actions. The interface supports dark mode, custom Space colors, and five languages: English, Chinese, French, Spanish, and Japanese.

Strengths and limits

The free plan supports up to five Spaces with cloud sync and includes Chat Mode for the current page, vertical tabs, Space management, pattern-based Group Guard, and basic support. Paid plans provide unlimited Spaces and additional AI or automation features; the pricing page lists a seven-day money-back policy for new purchases. The site does not establish that every browser feature is available on every supported browser, and some tools require authorization or a paid plan. AI grouping and automation should therefore be evaluated against the specific tab and browser workflows a user needs.