BrowserOS is an open-source agentic browser that runs AI agents locally. Your privacy-first alternative to Perplexity Comet.
Cost / License
- Free
- Open Source (AGPL-3.0)
Application type
Platforms
- Mac
- Windows
- Linux
United States



Apps similar to Deta Surf include Obsidian, which has a free version. Other options are Joplin, Raindrop.io, Logseq and Anytype. There's no shortage of Note-taking Tools like Deta Surf, with more than 100 alternatives for Mac, Windows, the web, Android and iPhone.
BrowserOS is an open-source agentic browser that runs AI agents locally. Your privacy-first alternative to Perplexity Comet.



Intelligent browser offering AI search, contextual sidebar for instant content analysis, agent-driven automations like booking or emailing, privacy-first data handling, seamless Chrome extension support, and unified management of web tasks for work and personal use.




A fully self-hostable, open-source collaborative bookmark manager to collect, organize and archive webpages.

Obsidian Web Clipper saves web content into your personal vault, ensuring offline access. Use customizable templates, smart triggers, and select page content to clip. Preserves data in Markdown, providing a secure, private, and durable format for organizing linked notes.




Lightweight, self-hosted app for managing personal checklists and notes with drag and drop, progress bars, Kanban boards, Markdown WYSIWYG editor, file-based data, user management, sharing options, themes, open source, and API access.




Source-grounded AI notebook for research and study. Add PDFs, websites, YouTube videos, audio files, documents, or presentations, then ask questions and receive cited answers. Generate summaries, study guides, mind maps, audio overviews, and video overviews on web or mobile.



Capture web links and newsletters, organize articles with tags, notes, and highlights, search a personal library, and read clean text online or offline in a focused Markdown viewer. Planned features include AI summaries, PDF extraction, and mobile apps.




NeverWrite is a local-first knowledge workspace for people who need to handle workflows with multiple parallel agents and subagents. Built like a code editor, but for markdown. It has inline review changes, like Cursor and others.


Markdown editor with WYSIWYG interface, AI-powered wiki tools, LLM integrations, and collaboration features. Supports team sharing, GitHub sync, graph link navigation, TUI access, and embeddable components for specs or reports, all in a private environment.

SwiftUI-powered macOS browser featuring native WebKit rendering, local AI using Apple MLX, adaptive tab hibernation, granular privacy controls, incognito mode, comprehensive keyboard shortcuts, ad blocking, secure password management, and built-in download manager.

Highly customizable AI research agent just like NotebookLM / Perplexity / Glean, connected to external sources such as search engines (Tavily), Slack, Notion, YouTube, GitHub and more.




Desktop browser replaces tabs with Spaces, organizing web apps into themed workspaces for efficient switching. Includes command palette, overlay tab switcher, ad blocker, dark mode, Picture-in-Picture, download management, and robust privacy controls without telemetry.



