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Roar

Open-source browser that keeps each AI agent in its lane

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Roar is a free, MIT-licensed sidebar browser for Mac with a built-in MCP server. Each agent sees its own tabs, wrapped in mint so you can watch. It groups its work, names tabs on request, asks you with buttons and stays out of spaces you block.

PH · launched Nov 10, 2026 · 1 upvote (top 65%) · 0 views

Niche: ai browser agents · 105 launches, 9 in the last 7 days ▲ +50% · Explore this niche →

Category and tags
  • Horizontal
  • Agent / copilot
  • Prosumer
  • AI-native
  • Hobby / open-source project
  • Mac
  • Open Source
  • Artificial Intelligence
  • GitHub

Visit website ↗ Source listing ↗

More like this: all 105 launches in ai browser agents →

Could you build this?

Partial The sidebar UI, tab grouping, and MCP server layer are vibe-codeable, but a real browser needs an embedded web engine and per-agent tab isolation, which is systems-level work.

What it would actually take: Build on WKWebView (or a Chromium embed such as CEF) in a Swift/AppKit shell, then add a sidebar UI and an MCP server that exposes tab-scoped tools. The hard parts are reliable session and tab isolation per agent, enforcing blocked-space rules at the navigation layer, and keeping pace with web engine updates. This needs macOS and browser-engine experience, not only prompting.

Competitors

Other products that read as similar to this one : 59 launches clear the similarity bar, closest 8 shown.

Attention rank: #42 of 60 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).

Launched 218 days after the earliest competitor.

  • Roar AI · ph · 2026-09-18 · 2 upvotes · similarity 0.42
  • FanBubble · ph · 2026-10-07 · 1 upvotes · similarity 0.39
  • Lilo · github · 2026-10-24 · 24 upvotes · similarity 0.36
  • vibe-gauge · github · 2026-09-18 · 13 upvotes · similarity 0.36
  • Sider Omni Sidebar · ph · 2026-09-18 · 301 upvotes · similarity 0.36
  • Toolivo · ph · 2026-09-28 · 3 upvotes · similarity 0.35
  • Kinaya · ph · 2026-10-27 · 1 upvotes · similarity 0.35
  • Shebang · ph · 2026-10-12 · 1 upvotes · similarity 0.35

Related data

The niche, labels, vibe code rating and competitor comparison on this page are analysis by Nicheloom. If you use them, please credit nicheloom.com. How you may use our data.