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BrowserOS / Nxtscape

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Chromium fork with native AI agent support. YC S24 backed. Privacy-first agentic browser with 12 built-in AI skills. Supports 11+ LLM providers including Ollama for local models. Only credible open-source alternative to ChatGPT Atlas, Perplexity Comet, and Dia.

Score 82

Where it wins

Chromium fork with native AI agent integration — not a plugin or overlay

YC-backed with weekly releases: 47 releases in ~10 months, v0.43.0 on 2026-03-12

31-tool MCP server integration (v0.42.0); Skills, Memory, SOUL.md in v0.43.0

Supports 11+ LLM providers including local models (Ollama, LMStudio) — browsing history stays on device

314-point HN (Jun 2025) + 88-point thread (Jan 2026 as BrowserOS)

Only credible open-source alternative to Atlas/Comet/Dia

Where to be skeptical

~10 contributors despite YC backing — thin team for a browser product

AGPL-3.0 license may block enterprise adoption

Lane 4 (consumer agentic browser) — different market than developer automation tools

HN criticism flagged prompt injection risk

Editorial verdict

Lane 4 leader. Just crossed 10K stars. 314 HN pts with 206 comments is strong organic engagement. YC S24 backing. Privacy-first Chromium fork with built-in AI. Different market than Lanes 1-3 but clear leader in consumer agentic browsers.

Related

Public evidence

strong2025-06
YC S24 backing — institutional credibility

YC S24 backing provides institutional credibility. Available on macOS, Windows, Linux. 12 built-in AI skills (deep research, price comparison, form filling).

YC S24 batch companyY Combinator (institutional)
moderate2026-03
10K+ stars, actively maintained — crossed threshold

Just crossed the 10K star threshold. Actively maintained — pushed Mar 19. Privacy-first, supports local models (Ollama). 47 releases in ~10 months.

10,003 stars, pushed Mar 19GitHub (public metrics)

Raw GitHub source

GitHub README peek

Constrained peek so you can sanity-check the source material without leaving the site.

<div align="center"> <img width="693" height="379" alt="github-banner" src="https://github.com/user-attachments/assets/1e37941c-4dbc-4662-9c8c-3bbe9971301d" />

<br></br> <br></br> <a href="https://files.browseros.com/download/BrowserOS.dmg"> </a> <a href="https://files.browseros.com/download/BrowserOS_installer.exe"> </a> <a href="https://files.browseros.com/download/BrowserOS.AppImage"> </a> <a href="https://cdn.browseros.com/download/BrowserOS.deb"> </a> <br />

</div>

BrowserOS is an open-source Chromium fork that runs AI agents natively. The privacy-first alternative to ChatGPT Atlas, Perplexity Comet, and Dia.

Use your own API keys or run local models with Ollama. Your data never leaves your machine.

Documentation · Discord · Slack · Twitter · Feature Requests

Quick Start

  1. Download and install BrowserOS — macOS · Windows · Linux (AppImage) · Linux (Debian)
  2. Import your Chrome data (optional) — bookmarks, passwords, extensions all carry over
  3. Connect your AI provider — Claude, OpenAI, Gemini, ChatGPT Pro via OAuth, or local models via Ollama/LM Studio

Features

FeatureDescriptionDocs
AI Agent53+ browser automation tools — navigate, click, type, extract data, all with natural languageGuide
MCP ServerControl the browser from Claude Code, Gemini CLI, or any MCP clientSetup
WorkflowsBuild repeatable browser automations with a visual graph builderDocs
CoworkCombine browser automation with local file operations — research the web, save reports to your folderDocs
Scheduled TasksRun agents on autopilot — daily, hourly, or every few minutesDocs
MemoryPersistent memory across conversations — your assistant remembers context over timeDocs
SOUL.mdDefine your AI's personality and instructions in a single markdown fileDocs
LLM HubCompare Claude, ChatGPT, and Gemini responses side-by-side on any pageDocs
40+ App IntegrationsGmail, Slack, GitHub, Linear, Notion, Figma, Salesforce, and more via MCPDocs
Vertical TabsSide-panel tab management — stay organized even with 100+ tabs openDocs
Ad BlockinguBlock Origin + Manifest V2 support — 10x more protection than ChromeDocs
Cloud SyncSync browser config and agent history across devicesDocs
SkillsCustom instruction sets that shape how your AI assistant behavesDocs
Smart NudgesContextual suggestions to connect apps and use features at the right momentDocs

Demos

BrowserOS agent in action

BrowserOS agent in action <br/><br/>

Install BrowserOS as MCP and control it from claude-code

https://github.com/user-attachments/assets/c725d6df-1a0d-40eb-a125-ea009bf664dc

<br/><br/>

Use BrowserOS to chat

https://github.com/user-attachments/assets/726803c5-8e36-420e-8694-c63a2607beca

<br/><br/>

Use BrowserOS to scrape data

https://github.com/user-attachments/assets/9f038216-bc24-4555-abf1-af2adcb7ebc0

<br/><br/>

Install browseros-cli

Use browseros-cli to launch and control BrowserOS from the terminal or from AI coding agents like Claude Code.

macOS / Linux:

curl -fsSL https://cdn.browseros.com/cli/install.sh | bash

Windows:

irm https://cdn.browseros.com/cli/install.ps1 | iex

After install, run browseros-cli init to connect the CLI to your running BrowserOS instance.

LLM Providers

BrowserOS works with any LLM. Bring your own keys, use OAuth, or run models locally.

ProviderTypeAuth
Kimi K2.5Cloud (default)Built-in
ChatGPT Pro/PlusCloudOAuth
GitHub CopilotCloudOAuth
Qwen CodeCloudOAuth
Claude (Anthropic)CloudAPI key
GPT-4o / o3 (OpenAI)CloudAPI key
Gemini (Google)CloudAPI key
Azure OpenAICloudAPI key
AWS BedrockCloudIAM credentials
OpenRouterCloudAPI key
OllamaLocalSetup
LM StudioLocalSetup

How We Compare

BrowserOSChromeBraveDiaCometAtlas
Open Source
AI Agent
MCP Server
Visual Workflows
Cowork (files + browser)
Scheduled Tasks
Bring Your Own Keys
Local Models (Ollama)
Local-first Privacy
Ad Blocking (MV2)

Detailed comparisons:

  • BrowserOS vs Chrome DevTools MCP — developer-focused comparison for browser automation
  • BrowserOS vs Claude Cowork — getting real work done with AI
  • BrowserOS vs OpenClaw — everyday AI assistance

Architecture

BrowserOS is a monorepo with two main subsystems: the browser (Chromium fork) and the agent platform (TypeScript/Go).

BrowserOS/
├── packages/browseros/              # Chromium fork + build system (Python)
│   ├── chromium_patches/            # Patches applied to Chromium source
│   ├── build/                       # Build CLI and modules
│   └── resources/                   # Icons, entitlements, signing
│
├── packages/browseros-agent/        # Agent platform (TypeScript/Go)
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