Alternatives to Dia
AI-first browser with a chat sidebar that works across your tabs. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
Dia
AI-first browser with a chat sidebar that works across your tabs.
Replacements
Listings that take over the same core job as Dia.
Perplexity Comet
Agentic browser with a built-in research assistant and task automation.
Perplexity Comet adds an assistant that can act on pages as well as summarise them, runs on Windows and macOS, and requires a Perplexity account.
Brave
A Chromium browser that blocks ads and trackers out of the box, with no extension to install first.
Brave is an open-source Chromium browser with a built-in AI assistant and default ad blocking, running on Windows, macOS, Linux and Android.
Maxthon
Long-running Chromium browser with built-in notes, passwords and AI chat.
Maxthon offers multi-model AI chat plus notes and a password manager on Windows and macOS, but is closed source with a China-based owner and past telemetry issues.
ChatGPT Atlas
OpenAI's Chromium-based web browser with ChatGPT and an agent mode built into every page.
ChatGPT Atlas is OpenAI's macOS Chromium browser with ChatGPT and an agent mode on every page, tied to the ChatGPT service and sharing browsing context with OpenAI.
Opera Neon
Opera's agentic web browser that uses AI agents to research, manage tabs and act on web pages.
Opera Neon uses several AI agents to research, manage tabs and act on pages on Windows and macOS, connects to tools through MCP and CLI, and is paid.
Fellou
A desktop web browser with a built-in AI agent that carries out multi-step tasks across websites.
Fellou focuses on AI agents that run multi-step tasks across websites with an editable action plan, and runs on Windows as well as macOS.
Arc
Chromium browser organised around spaces, a sidebar and split views.
Arc is a Chromium browser built around spaces, a sidebar and split views rather than an AI chat assistant, adds Windows, and receives only limited feature work.
Also worth comparing
These listings name Dia as their own alternative, so the relationship runs both ways.
BrowserOS
An open-source Chromium-based browser with built-in AI agents that can run on local models.
Dia puts an AI chat sidebar across your open tabs, but it is closed source, macOS only, requires an account and sends page content to a remote service.
SigmaOS
macOS browser that organises tabs into workspaces and treats them as tasks.
Dia is a macOS browser centred on an AI chat sidebar that reads your open tabs, rather than on workspaces, and it sends page content to a remote service.
Similar software
Related functionality, not a direct replacement.
Arc Search
Mobile browser with an AI Browse for Me mode that reads pages and summarizes them.
Safari
Apple's browser, with the deepest integration into macOS and Apple devices.
