ブラウザ戦争は検索ではなく代替案へ

The browser wars have entered a new phase this year: The fight isn’t just over search results anymore — it’s over which company’s AI gets to act on your behalf inside the browser. Google Chrome and Apple’s Safari still dominate the market overall, with Chrome’s edge coming largely from how aggressively it has woven generative AI into search. But 2026 has brought a wave of new entrants — from well-funded startups to Big Tech — all betting that the browser is about to become less like a window onto the web and more like an assistant that gets things done for you.

Users looking for alternatives to Chrome and Safari can choose from a growing variety of browsers aimed at challenging the industry giants. To help navigate the competitive landscape, we’ve compiled an overview of some of the top alternative browsers available today. This includes browsers leveraging AI, open source browsers that promote customization and privacy, and “mindful browsers” — a new term that refers to browsers designed to enhance user well-being.

AI-powered browsers

Perplexity’s Comet

Perplexity launched its AI-powered web browser in July 2025. Called Comet, the company’s new product acts as a chatbot-based search engine and can perform actions like summarizing emails, browsing web pages, and performing tasks such as sending calendar invites. It’s currently only available to users with Perplexity’s $200/month Max plan, but there’s also a waitlist where people can sign up.

The Browser Company’s Dia

The Browser Company, the startup behind the Arc browser, introduced Dia last summer. The AI-centric browser looks similar to Google Chrome but has an AI chat tool.

Dia is designed to help users navigate the web more easily. It’s able to look at every website that a user has visited and every website they’re logged into, enabling it to help you find information and perform tasks. For instance, Dia can provide information about the page a user is currently browsing, answer questions about a product, and summarize uploaded files.

Dia is currently free to download.

Opera’s Neon

Opera entered the AI agentic browser war in May 2025 with Neon, which has contextual awareness and can do things like researching, shopping, and writing snippets of code. Notably, it can even perform tasks while the user is offline.

Neon is currently available on macOS and Windows. The subscription costs $19.90 per month.

OpenAI’s Atlas (killed July 2026)

Last October, OpenAI launched its AI-powered web browser, called Atlas. The browser allowed users to ask ChatGPT about search results and browse websites within the chatbot instead of being directed to outside links. There was also an “agent mode” for users to ask ChatGPT to complete tasks on their behalf.

However, the company recently decided to shut down the browserand instead incorporate some of the agentic browsing capabilities into ChatGPT’s desktop app and Chrome extension.

Aside

Backed by Y Combinator, Aside is an AI-first, browser-native automation platform built to autonomously complete tasks, fill out forms, and manage data on behalf of users. The company describes the experience simply: “Give it your passwords, browsing history, and browser context.” Unlike traditional automation tools that rely on integrations, Aside operates directly within the browser itself, allowing it to work across Gmail, Notion, Slack, Figma, and banking platforms.

Jatter

Jatter launched its AI-powered browser in June, giving users the ability to ask questions about any web page, uncover relevant insights, and receive personalized recommendations based on their browsing activity. Additionally, Jatter offers an integrated Notes app, so it can learn from that content, summarize notes, and surface key details.

Jatter is currently available on Mac, Windows, iOS, and Android devices. It’s free to use, but there’s an optional subscription for $10 per month.

Privacy-focused browsers

Brave

Brave is among the more well-known privacy-first browsers, popular for its built-in ad and tracker blocking capabilities. It also has a gamified approach to browsing, rewarding users with its own cryptocurrency called Basic Attention Token (BAT). When users choose to opt in to view ads, supporting their favorite websites, they get a share of the ad revenue. Additional features include a VPN service, an AI assistant, and a video calling feature.

DuckDuckGo

DuckDuckGo is another browser that many people are probably already familiar with, thanks to its search engine by the same name. Launched in 2008, the company recently made significant investments in its browser to stay competitive by introducing generative AI features, such as a chatbot. It also enhanced its scam blockerto detect a wider range of scams, including fake cryptocurrency exchanges, scareware tactics, and fraudulent e-commerce websites. In addition to blocking scams, DuckDuckGo prevents trackers and ads, and it doesn’t track user data, resulting in fewer pop-ups for users.

Ladybird

Ladybird, led by GitHub co-founder and former CEO Chris Wanstrath, has an ambitious mission compared to rivals — it aims to build an entirely new open source browser from scratch. This means it will not rely on code from existing browsers, a feat that has rarely been accomplished. Most alternative web browsers depend on the Chromium open source project maintained by Google, which is the most widely used base for many browsers.

Like other privacy-focused browsers, Ladybird will offer features to minimize data collection, such as a built-in ad blocker and the ability to block third-party cookies. The browser has yet to be launched, with an alpha version scheduled for release this year for early adopters, available on Linux and macOS.

Vivaldi

Vivaldi is a Chromium-based browser created by one of the original developers of the Opera browser. Its biggest selling point is its customizable user interface, which allows users to change the appearance and enable or disable features. One unique feature is that the browser window changes color to match the website being viewed. Other key features include ad blocking, a password manager, no user data tracking, and productivity tools such as a calendar and notes.

Niche browsers

Opera Air

Opera launched the Air browser in February 2025, becoming one of the first mindfulness-themed browsers in the space. While Opera Air functions like a typical web browser, it includes unique features designed to support mental well-being. These features consist of break reminders and breathing exercises. Another feature, called “Boosts,” provides a selection of binaural beats to either help improve focus or relaxation.

SigmaOS

SigmaOS is a Mac-only browser featuring a workspace-style interface that emphasizes productivity. It displays tabs vertically, allowing users to treat them like a to-do list that can be marked as complete or snoozed for later. Users can create workspaces — essentially groups of tabs — to better organize different activities, such as separating work from entertainment.

This Y Combinator-backed browser has been around for a few years now and has introduced more AI features, including the ability to summarize various elements of a web page, such as ratings, reviews, and prices. It also has an AI assistant that can answer questions, translate text, and rewrite content.

SigmaOS is free to use, but users who want more than three workspaces can subscribe to a plan for $8 per month, which provides unlimited workspaces.

Zen Browser

Zen Browser aims to create a “calmer internet” with its open source browser. Zen lets users organize tabs into Workspaces, and offers Split View to view two tabs side by side, among other productivity-focused features. Users can also enhance their browsing experience with community-made plug-ins and themes, such as a mod that makes the tab background transparent.

*This story has been updated after publication to include newly launched browsers. *

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