AI browser

Stoic Browser vs Dia

An AI browser for knowledge work, or one built around running products.

Checked 12 Oct 2026 · Dia site

The short answer

Pick Dia for chat that understands your tabs, Slack, Notion and calendar, with sync and an ad blocker. Pick Stoic Browser if your agent should act in signed-in product dashboards, be driven over MCP, and replay chores on a schedule.

Dia's AI comes with its paid plans; Stoic Browser uses your own coding CLIs or a local model
Dia integrates Slack, Gmail, Notion, GitHub and more; Stoic Browser's agents work on the pages themselves
Stoic Browser runs on Linux too; Dia is macOS and Windows
Dia syncs across devices and blocks ads; Stoic Browser keeps everything in one local file

What each one is

Stoic Browser

Stoic Browser is a desktop browser for founders who run more than one product. Each product gets a workspace with its own logins, your installed coding agents (Claude Code, Codex and 14 more) work inside those workspaces, outside agents can drive them over MCP, and recorded chores replay on a schedule. Free for 2 workspaces; Pro is $29 once.

Dia

Dia, from The Browser Company (part of Atlassian since October 2025), is an AI browser for work on macOS and Windows. The free plan covers profiles, tab groups, split view, an ad blocker and sync; paid plans add chat across your tabs and tools such as Slack, Gmail and Notion, a Morning Brief, and reports and decks.

Side by side

Feature	Stoic Browser	Dia
Basics
Price	Free · Pro $29 one-time	Free · AI plans from $10/mo, $100/mo top tier
Platforms	macOS, Windows, Linux	macOS, Windows
Chrome extensions	No	Yes
Sync across devices	No	Yes
Built-in ad blocker	No	Yes
AI and agents
Where the AI comes from	Your own coding CLIs (16) or a local model	Dia's hosted models, on paid plans
Agent acts on web pages	Yes, with 7 CLIs and local models	Chat, skills and tasks
Outside agents can drive it (MCP)	Built in: 4 presets, scoped to chosen workspaces	Not documented
Connects to Slack, Gmail, Notion	Via your CLI's own MCP servers	Yes
Running several products
Separate logins per product	A separate session per workspace	Profiles
Split view	4 layouts, up to 4 panes	Two pages side by side
Scheduled, repeatable browser jobs	Recorded automations and Crawl Mode, every 15 min to daily	Morning Brief on the top plan
Where your data lives	One local SQLite file on your machine	Synced; AI requests go to Dia's models

Which to choose

Choose Stoic Browser if

Your AI budget already goes to Claude Code, Codex or a local model
You need Linux
You want outside agents to drive your signed-in sessions over MCP
You want chores recorded once and replayed in the background

Choose Dia if

You want AI that reads across Slack, Notion, Gmail and your calendar
You want a polished everyday browser with sync and ad blocking
You use Chrome extensions
You'd rather pay one AI plan than install a coding CLI

Questions

Something missing? Write to hello@stoicsoft.com.

What does Dia cost?

The browser is free. On 12 October 2026 Dia's pricing page listed the Better Answers plan at $10/month in its plan table (its FAQ said $20) and Better Days at $100/month. Check Dia's pricing page for the current figure.

Is Stoic Browser an Arc or Dia replacement?

If you want workspaces, isolated logins, split view and a command palette, it covers that. It is built around operating products rather than general knowledge work, so it adds automations, Crawl Mode and agent access instead of tool integrations and sync.

Free for 2 workspaces. No account needed. macOS, Windows and Linux.

Download Stoic Browser