Alternatives to Perplexity Comet
Agentic browser with a built-in research assistant and task automation. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
Perplexity Comet
Agentic browser with a built-in research assistant and task automation.
Replacements
Listings that take over the same core job as Perplexity Comet.
Dia
AI-first browser with a chat sidebar that works across your tabs.
Dia offers an AI chat sidebar that reads across your open tabs rather than acting on pages, runs on macOS only, and also requires an 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 an AI assistant alongside default ad and tracker blocking, and it adds Linux and Android builds.
Maxthon
Long-running Chromium browser with built-in notes, passwords and AI chat.
Maxthon is a closed-source Chromium browser with multi-model AI chat, notes and a password manager built in, from a China-based owner with a past telemetry record.
ChatGPT Atlas
OpenAI's Chromium-based web browser with ChatGPT and an agent mode built into every page.
ChatGPT Atlas is OpenAI's Chromium browser with ChatGPT and an agent mode on every page, but it is macOS only and tied to the ChatGPT service.
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 and act on open 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 runs multi-step AI agent tasks across websites and shows an editable action plan before acting, on Windows and macOS, and connects to Notion, Google and X.
Also worth comparing
These listings name Perplexity Comet 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.
Perplexity Comet offers an assistant that acts on pages on Windows and macOS, but it is closed source, freemium and requires a Perplexity account instead of local models.
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.
Arc
Chromium browser organised around spaces, a sidebar and split views.
Yandex Browser
Chromium browser from Yandex with built-in translation and AI features.
Microsoft Edge
Microsoft's Chromium-based browser, bundled with Windows.
Google Chrome
Google's browser, the Chromium-based one most web development is tested against.
Lightpanda
A headless browser written from scratch in Zig for web automation, crawling and AI agents.
