kitio.aiPerplexity Comet vs Sigma Browser
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Sigma Browser has the lower starting price: about $10 a month, against $20 for Perplexity Comet.
Perplexity's AI browser with an assistant that can act on web pages
Freemium · $20/moAt a glance
Best for
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Pricing model
Starting price
Free plan
Made by
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Key features
- Built-in AI assistant
- Tab summaries
- Agentic tasks
- Chrome extension support
- Perplexity search
- Browser AI agent
- On-device Eclipse model
- Chat with page
- Deep research
- Image generation
- Built-in ad blocker
| Feature | Perplexity Comet | Sigma Browser |
|---|---|---|
| Best for | Perplexity's AI browser with an assistant that can act on web pages | Privacy-focused browser with an AI agent and an on-device model |
| Category | Productivity | Productivity |
| Pricing model | Freemium | Freemium |
| Starting price | $20/mo | $10/mo |
| Free plan | Yes | Yes |
| Made by | Perplexity | Sigma |
| Based in | United States | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Sigma Browser has the lower starting price: about $10 a month, against $20 for Perplexity Comet.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
Free
Free
- Comet browser free to download
- Basic assistant and search
Pro
$20/mo
- More advanced searches and models
- Expanded Comet assistant usage
Max
$200/mo
- Highest usage limits
- Early access to new features
3 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 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Perplexity Comet
- Free to use
- Assistant sees page context
- Familiar Chrome base
- Agent actions raise security concerns
- Best limits need a paid plan
Sigma Browser
- Local model keeps prompts on device
- Agent completes tasks on web pages
- Free tier available
- Agent access limited on the free plan
- Pro plan costs $75/mo billed monthly
- No Android version listed
Which one should you choose?
Choose Perplexity Comet if you want:
- Free to use
- Assistant sees page context
- Familiar Chrome base
Watch out: agent actions raise security concerns.
Choose Sigma Browser if you want:
- Local model keeps prompts on device
- Agent completes tasks on web pages
- Free tier available
Watch out: agent access limited on the free plan.
Perplexity Comet vs Sigma Browser FAQ
What is the difference between Perplexity Comet and Sigma Browser?
Perplexity Comet: Perplexity's AI browser with an assistant that can act on web pages. Sigma Browser: Privacy-focused browser with an AI agent and an on-device model. Both are productivity tools.
Is Perplexity Comet or Sigma Browser cheaper?
Sigma Browser has the lower starting price: about $10 a month, against $20 for Perplexity Comet.
Do Perplexity Comet and Sigma Browser have free plans?
Perplexity Comet: Yes. Sigma Browser: Yes.
Who makes Perplexity Comet?
Perplexity Comet is made by Perplexity, based in United States.
Who makes Sigma Browser?
Sigma Browser is made by Sigma.
Which should I choose, Perplexity Comet or Sigma Browser?
Choose Perplexity Comet if you value free to use and assistant sees page context. Choose Sigma Browser if you value local model keeps prompts on device and agent completes tasks on web pages.