kitio.aiCoot vs Sigma Browser
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Coot starts at See pricing page and Sigma Browser starts at $10/mo. Check both pricing pages for current plans.
At a glance
Best for
Category
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Local model hub
- Private document Q&A
- Email triage and drafting
- Scheduled workflows
- Multi-step agents
- Skills and memory
- Browser AI agent
- On-device Eclipse model
- Chat with page
- Deep research
- Image generation
- Built-in ad blocker
| Feature | Coot | Sigma Browser |
|---|---|---|
| Best for | Free private AI app for your documents, email and calendar | Privacy-focused browser with an AI agent and an on-device model |
| Category | Productivity | Productivity |
| Pricing model | Freemium | Freemium |
| Starting price | See pricing page | $10/mo |
| Free plan | Yes | Yes |
| Made by | Coot AI | Sigma |
| Based in | – | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Coot starts at See pricing page and Sigma Browser starts at $10/mo. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
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 29, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Coot
- Data stays on your own hardware
- Free download for personal use
- Covers documents, email and calendar together
- Desktop download is macOS only
- Local models need capable hardware
- Business pricing requires contacting sales
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 Coot if you want:
- Data stays on your own hardware
- Free download for personal use
- Covers documents, email and calendar together
Watch out: desktop download is macos only.
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.
Coot vs Sigma Browser FAQ
What is the difference between Coot and Sigma Browser?
Coot: Free private AI app for your documents, email and calendar. Sigma Browser: Privacy-focused browser with an AI agent and an on-device model. Both are productivity tools.
Is Coot or Sigma Browser cheaper?
Coot starts at See pricing page and Sigma Browser starts at $10/mo. Check both pricing pages for current plans.
Do Coot and Sigma Browser have free plans?
Coot: Yes. Sigma Browser: Yes.
Who makes Coot?
Coot is made by Coot AI.
Who makes Sigma Browser?
Sigma Browser is made by Sigma.
Which should I choose, Coot or Sigma Browser?
Choose Coot if you value data stays on your own hardware and free download for personal use. Choose Sigma Browser if you value local model keeps prompts on device and agent completes tasks on web pages.