Agentモード
フォーム・調査・マルチタブを別タブグループで実行。
無料枠の実態
AI Free Browser
「無料」AIブラウザはAgentやモデル切替を有料化しがち。このスコアボードで$0の中身とTabbitの優位を確認。
$0 · 招待コード不要無料能力スコア（5点満点）
5 = 無料枠でフル提供
Tabbit
Full free tierAgent自動化
5/5
マルチモデルチャット
5/5
スマートタブ
5/5
ページ文脈（@）
5/5
Mac / Windows
5/5
Comet
Free, capped agentAgent自動化
4/5
マルチモデルチャット
3/5
スマートタブ
3/5
ページ文脈（@）
3/5
Mac / Windows
5/5
ChatGPT Atlas
Free + Plus upsellAgent自動化
3/5
マルチモデルチャット
4/5
スマートタブ
2/5
ページ文脈（@）
3/5
Mac / Windows
5/5
Brave Leo
Assistant add-onAgent自動化
2/5
マルチモデルチャット
2/5
スマートタブ
3/5
ページ文脈（@）
2/5
Mac / Windows
5/5
Sigma
Early free tierAgent自動化
3/5
マルチモデルチャット
3/5
スマートタブ
3/5
ページ文脈（@）
2/5
Mac / Windows
4/5
Definition
What an AI free browser should include
- 1Multi-step Agent tasks in the browser—not just chat in a sidebar
- 2Switch models without upgrading (GPT, Claude, Gemini, DeepSeek, etc.)
- 3Organize dozens of tabs without a paid “productivity” tier
- 4Reference open tabs, screenshots, and files as AI context
- 5Native apps for desktop—not a web-only demo
Tabbit $0
Tabbit無料スタックの全体
実行力重視のAIネイティブブラウザ。チャット箱の追加ではありません。
Omnibox + @
タブ・スクショ・ローカルファイルを文脈に。
Skills
プロンプトと自動化を無料で共有・発見。
垂直タブ
自動グループと全文ブックマーク。
Fine print
Where other “free” AI browsers stop
Every product below has a $0 plan. The gap is what they lock once you rely on them daily.
Perplexity Comet
Agent actions and deep research often hit usage caps; AI tied to Perplexity models
ChatGPT Atlas
Advanced browsing and higher limits need ChatGPT Plus (~$20/mo)
Brave Leo
Basic Q&A and summaries—no autonomous multi-step Agent or workspace tabs
Sigma Browser
Offline Eclipse AI still maturing; Web3 features add noise for mainstream users
Download
AI free browser for Mac & Windows
macOS
Import from Chrome, Edge, or Safari—history, passwords, and extensions in minutes.
Windows
Same Agent stack and models; built for Win 11 power users and students.
FAQ
AI free browser questions
What is an AI free browser?
A desktop browser with built-in AI—chat, summaries, and often automation—available without a subscription. Quality varies: some only offer a sidebar assistant, while AI-native browsers like Tabbit include Agent execution in the free tier.
Is Tabbit really a free AI browser?
Yes. Tabbit’s public beta is free with no invite code. Agent Mode, multi-model chat, vertical tabs, and Skills are included at $0 on Mac and Windows.
How is “ai free browser” different from “ai browser free”?
Searchers use both phrases for the same intent—finding a no-cost AI browser. This page focuses on what’s included for free, not marketing labels.
Is Comet browser free?
Comet has a free plan, but Agent-heavy workflows may hit limits. Tabbit does not gate core Agent or model switching behind a paid tier.
Is ChatGPT Atlas free?
Atlas offers a free tier with usage caps. Power users often need ChatGPT Plus for consistent browsing automation.
Can I download an AI free browser for Windows?
Yes—download Tabbit for Windows from the official site. The same free feature set applies as on macOS.
Does a free AI browser replace Chrome extensions?
For many tasks, yes—built-in Agent and context beat stacking extensions. You can still import Chrome extensions into Tabbit during setup.
Which AI free browser is best in 2026?
If you need Agent automation, multi-model choice, and tab workspaces at no cost, Tabbit scores highest on the five axes above. For basic summaries only, Brave Leo may be enough.
ずっと無料前提のAI free browser
Mac/Windows · Agent+モデル+タブ · カード不要
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