IN THE FIELD GUIDE

Fourline

fourline.ai

FourLine is a browser extension that consolidates multiple AI chat services into a single unified workspace, enabling side-by-side comparison and broadcasting of prompts. It supports research, writing, and coding workflows by providing persistent sessions, tab management, and multi-view layouts.

THE PRODUCT, BEYOND THE PITCH

Automatically researched · Not editorially reviewed · Sources checked Oct 5, 2026

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A good fit for

Users who need to research, write, or code using multiple AI chat services simultaneously.
Users who want to avoid tab switching and manage AI chats in a distraction-free control center.

Know the limitations

Mobile app is not yet available but is coming soon.
Desktop app is in progress and not yet released.

What you can do

Comparing AI-generated answers side-by-side to make faster decisions without switching tabs.
Managing multiple AI chat sessions in a single workspace to maintain context and workflow continuity.

Features

Broadcast prompts simultaneously to multiple AI models with service-aware input injection.
Tab management with drag-and-drop reordering, per-tab zoom controls, live URL tracking, and inline renaming.
Multiple view modes including single-pane focus mode and split view to show two or more tabs simultaneously with resizable dividers.
Save reusable prompts and notes to a dedicated library and organize tabs into named, lockable groups (workspaces).
One-click full workspace JSON import and export for saving and restoring state.

Integrations

Not confirmed yet.

Platforms & data export

Available as a Chrome browser extension, a native Electron desktop app, and a zero-install web app; mobile app coming soon.

THE COST FOR YOUR TEAM

Go beyond the starting price.

Published plan prices for your team size and usage. Results update as you type. Taxes, currency conversion and unlisted add-ons are excluded, and anything the source did not state is called out rather than guessed.

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Known monthly subtotal

$0.00/month

1 of 1 tools could not be priced with these inputs, so this is not the full cost.

Plan costs based on your requirements
Tool / plan	Monthly	Per year	What this assumes
Fourline	No pricing recorded yet. Check the official site, or ask the owner to add it.

Alternatives to explore

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