kitio.aiAdded Oct 28, 2026
Sigma Browser
Freemium · $10/moPrivacy-focused browser with an AI agent and an on-device model
What is Sigma Browser?
Sigma is a web browser for Mac, Windows and iPhone that builds in an AI agent, an AI chat and a local language model called Eclipse that runs on your device. It is pitched at people who want AI help while browsing without sending everything to the cloud.
The agent can navigate pages, fill forms and complete multi-step tasks from a goal you describe. AI Chat handles questions, deep research, image generation and writing, and you can chat with the page you are reading.
Eclipse answers, summarizes and writes offline so prompts stay on the device, and a built-in ad blocker cleans up pages. Sigma belongs to a wider ecosystem that includes a VPN, private email and a local AI chat app.
Features
- Browser AI agent
- On-device Eclipse model
- Chat with page
- Deep research
- Image generation
- Built-in ad blocker
Tags
Releases
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Organization
Sigma
Listed by kitio.ai · unverified owner
Pricing
- Pricing model
- Freemium
- Paid options from
- $10/mo
- Billing frequency
- Monthly
Sigma Browser plans
Free
Free
- AI chat on all platforms
- Text, image and file analysis
- Limited AI agent access
Plus
$10/mo
- Unlimited prompts
- Unlimited text writer
- 50x more file uploads
Pro
$75/mo
- Unlimited file uploads
- Unlimited web search
- Unlimited image generation
Prices in USD, checked Oct 29, 2026. Plans change often, so confirm on the Sigma Browser site.Official pricing
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Pros and cons
Pros
- Local model keeps prompts on device
- Agent completes tasks on web pages
- Free tier available
Cons
- Agent access limited on the free plan
- Pro plan costs $75/mo billed monthly
- No Android version listed
Prompts & results
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Reviews
Q&A
What is Sigma Browser?
Sigma is a web browser for Mac, Windows and iPhone that builds in an AI agent, an AI chat and a local language model called Eclipse that runs on your device. It is pitched at people who want AI help while browsing without sending everything to the cloud.
Which platforms does Sigma Browser run on?
Sigma offers downloads for macOS and Windows and an iPhone app on the App Store.
Does Sigma Browser work offline?
Its built-in Eclipse model runs locally, so you can ask questions and summarize pages without sending prompts to a server.
How much does Sigma Browser cost?
Sigma Browser is freemium, with paid plans from $10/mo.
Is there a free version of Sigma Browser?
Yes. Sigma Browser has a free plan, and paid plans add more usage and features.
What are the main features of Sigma Browser?
Browser AI agent, On-device Eclipse model, Chat with page, Deep research, Image generation, Built-in ad blocker.
Who makes Sigma Browser?
Sigma Browser is made by Sigma.
What are the best alternatives to Sigma Browser?
Popular alternatives include Perplexity Comet, Dia, Canary Mail.