The best Sigma AI Browser alternatives in 2026
Privacy-focused browser with an AI agent and a built-in on-device AI model. Sigma AI Browser scores 6.9/10 in our AI browsers ranking. 6 alternatives score higher. Every app below is scored with the same published rubric.
9 alternatives, best first
Full AI browsers ranking →- 1
Perplexity Comet
Best forPeople who want the most capable free AI browser on every device
Perplexity's free AI browser with a built-in research assistant and task agent
Has that Sigma AI Browser doesn't: Ask questions across several open tabs · Choice of AI models
Free plan · paid from $5/month
Our Perplexity Comet verdict →Sigma AI Browser vs Perplexity Comet
8.7/10★★★★★Visit ↗ - 2
Google Chrome with Gemini
Best forChrome users who want AI help without switching browsers
The most-used browser, with Gemini built in and an auto-browse agent for subscribers
Free plan · paid from £18.99/month
8.2/10★★★★★Visit ↗ - 3
Microsoft Edge with Copilot
Best forWindows and Microsoft 365 users who want AI in the browser they already have
Microsoft's browser with Copilot reasoning across tabs, Journeys and tab podcasts
Has that Sigma AI Browser doesn't: Ask questions across several open tabs
Free plan · paid from $9.99/month
8.0/10★★★★★Visit ↗ - 4
Brave Leo
Best forPrivacy-minded people who want a free AI helper in a fast everyday browser
Private AI assistant built into the Brave browser, free with no account needed
Has that Sigma AI Browser doesn't: Choice of AI models
Free plan · paid from $14.99/month
8.0/10★★★★★Visit ↗ - 5
Genspark AI Browser
Best forPower users who want to automate research and shopping across many sites
Agentic browser with Autopilot mode, 700+ tool integrations and local AI models
Has that Sigma AI Browser doesn't: Choice of AI models · Connects to email, calendar or work apps
Free plan · paid from $19.99/month
7.4/10★★★★★Visit ↗ - 6
Opera with Aria
Best forPeople who want a capable free AI sidebar in a familiar browser
Opera's free built-in AI that reads your tabs, files and videos, no login needed
Has that Sigma AI Browser doesn't: Ask questions across several open tabs
Free
7.4/10★★★★★Visit ↗ - 7
Dia
Best forMac users who loved Arc and want a well-designed AI browser for work
Polished AI browser from the makers of Arc, with chat across tabs and work-app links
Has that Sigma AI Browser doesn't: Ask questions across several open tabs · Connects to email, calendar or work apps
Free plan · paid from $10/month
6.9/10★★★★★Visit ↗ - 8
Opera Neon
Best forPower users willing to pay for parallel agent work in the browser
Opera's paid agentic browser that researches, builds and completes tasks for you
Has that Sigma AI Browser doesn't: Choice of AI models
From $19.90/month
6.4/10★★★★★Visit ↗ - 9
Fellou
Best forResearchers and operators who want to hand off repetitive web workflows
Agentic browser for deep research and workflow automation, including logged-in sites
Free plan · paid from $19/month
5.7/10★★★★★Visit ↗
Quick answers
What is the best alternative to Sigma AI Browser?
In our AI browsers ranking, Perplexity Comet scores highest among the alternatives (8.7/10). Best for: People who want the most capable free AI browser on every device. Sigma AI Browser scores 6.9/10.
Is there a free alternative to Sigma AI Browser?
Yes. Perplexity Comet has a free plan (Full browser and Comet Assistant free on every platform, with limits on heavier AI features), and scores 8.7/10 in our ranking.
Why look for a Sigma AI Browser alternative?
Common reasons people switch: Very few app-store ratings and little independent testing. Local AI is slower on complex questions. Paid plan pricing isn't clearly published.