According to AlphaMoat, as of 2026-09, the Chrome extension Side-by-Side AI has 32 users (+3.2% MoM) — ranked #6,360 of 9,324 AI browser extensions, and #1,610 of 2,418 in General AI.
What is Side-by-Side AI
Multi-AI prompt broadcast with multi-window tiling and local session history. Warning: Side-by-Side AI is a web UI integration extension, not a standalone AI service or built-in chat UI. It works by opening supported AI websites inside a split-screen workspace, so you must sign in to each AI website in advance before using the extension.
Side-by-Side AI lets you use multiple AI chat websites in one split-screen workspace.
Features:
- Open multiple AI sites side by side
- Broadcast one prompt to selected sites
- @ mention to target specific sites
- # focus mode to expand one site quickly
- Combine the latest visible replies from active AI panes into one follow-up prompt
- Start a new chat across currently opened sites
- Save local prompt history with session recall
- Restore previous site session URLs after reload
- Add custom sites and request permission per site at runtime
- Support image paste/drag upload on supported sites
- Support light/dark theme and language options
Privacy:
- No account signup is required for the extension itself
- No remote server is required for core features
- Data is stored locally in Chrome storage
- Custom sites are only enabled after user-granted site permission
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Update notes for v0.3.1:
- Fixed image paste/drag upload delivery in Legacy Mode for Gemini
- Improved attachment handoff reliability for supported sites in the split-pane workspace
- Verified image paste upload behavior for Gemini, Claude, and ChatGPT in Legacy Mode
Update notes for v0.3.0:
- Added Compatibility Mode for AI sites that do not work reliably in the default split-pane view
- Added Perplexity support in Compatibility Mode
- Added a collapsible Legacy Mode input bar for more screen space
- Added a custom follow-up template for Combine Latest when the prompt box is empty
- Improved Compatibility Mode dock sizing and restored settings/history panel behavior
- Improved default site guidance and mode descriptions
- Fixed Legacy Mode input collapse/restore positioning
- Fixed Claude response extraction in Legacy Mode
- Improved runtime routing and response collection reliability across supported sites
Update notes for v0.2.0:
- Added one-click latest-reply combination for follow-up prompting
- Improved send progress feedback across sites
- Improved multiline prompt injection reliability
- Improved session restore and local history capture
- Fixed input bubble dragging and resizing behavior
Extension profile
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+ CompareData month: 2026-09 · User counts and ratings come from public Chrome Web Store data, aggregated monthly. See methodology.