Overview
Rill Browser is a free Mac browser designed for developers who already use Claude Code or Codex. The core idea is simple: browsing and building should not be two separate apps. You read a page, press ⌘E, and the thing you are looking at becomes a task for your agent — Rill finds the matching local project from your CLI history, passes along the page context, and the agent works in a side tab while you keep scrolling. The answer opens beside the page, not in a disconnected chat window.
What makes it more than a bookmarklet is the project awareness. Rill scans your Claude Code and Codex history to suggest which repository a request belongs to, explains its choice, and asks when it is unsure. Finished work shows up as a journal of where you went and what got done, and tabs are auto-grouped by activity. The browser also brings your existing sign-ins over from Chrome, Arc or Safari, keeps passwords in macOS Keychain, and runs the agent on your own account — so there is no new bill and no new cloud to trust.
In our evaluation the target user is well-served: a marketer forwarding a competitor page to a dev’s site project, a coder comparing a release note against a local repo, or a researcher collecting sources before drafting. The visible diff and Undo for Git changes help you review agent edits, though the tool itself does not validate results. The maker is explicit that sensitive actions like paying, posting or deleting are instructions the agent is told to pause before — a guardrail, not a hard lock, so prompt injection remains possible and disposable projects are the safe way to start.
Key Features
- ⌘E from any page — send the current page or selected text as a task to your connected agent
- Auto project routing — matches the request to a local Claude Code or Codex project from your history
- Background agents — up to several run in side tabs while you keep browsing normally
- Tab grouping and day summaries — history becomes searchable, themed groups instead of a flat list
- Local-first privacy — history, threads and Keychain passwords stay on your Mac
- Visible diffs and Git Undo — review file changes the agent made before you trust them
Pricing
| Plan | Price | For |
|---|---|---|
| Free (beta) | $0 | Anyone with macOS 14+ on Apple silicon and a Claude Code or Codex CLI |
| Your existing AI plan | Already paid | Rill adds no subscription; provider plan limits and charges still apply |
Rill is free in beta and layers on top of the Claude Code or Codex subscription you already hold. There is no Rill-specific fee; the only cost is whatever your underlying AI plan meters.
Comparison
Compared to Claude Code, Rill is not a coding agent — it is the browser that feeds your pages into the agent you already run, so the two are complementary rather than competing. Against Cursor, Rill does not replace the IDE; it keeps web research and agent tasks in one surface instead of alt-tabbing. Versus OpenClaw, which is a local-first general agent, Rill is narrowly focused on the browse-and-build loop for coding agents on macOS.