kitio.aiLoyal AI vs Sigma Browser
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Loyal AI is completely free, while Sigma Browser is freemium.
At a glance
Best for
Category
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Local email assistant
- Calendar management
- Meeting notes
- Dictation
- Approval before actions
- Browser AI agent
- On-device Eclipse model
- Chat with page
- Deep research
- Image generation
- Built-in ad blocker
| Feature | Loyal AI | Sigma Browser |
|---|---|---|
| Best for | Private personal AI for email and calendar that runs on your computer | Privacy-focused browser with an AI agent and an on-device model |
| Category | Productivity | Productivity |
| Pricing model | Free | Freemium |
| Starting price | Free | $10/mo |
| Free plan | Yes, fully free | Yes |
| Made by | Loyal AI | Sigma |
| Based in | – | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Loyal AI is completely free, while Sigma Browser is freemium.
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
Loyal AI
- Data stays on your device
- Covers email, calendar and notes together
- Asks before taking actions
- Invite-only beta
- No Linux or Android version yet
- Pricing not published
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 Loyal AI if you want:
- Data stays on your device
- Covers email, calendar and notes together
- Asks before taking actions
Watch out: invite-only beta.
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.
Loyal AI vs Sigma Browser FAQ
What is the difference between Loyal AI and Sigma Browser?
Loyal AI: Private personal AI for email and calendar that runs on your computer. Sigma Browser: Privacy-focused browser with an AI agent and an on-device model. Both are productivity tools.
Is Loyal AI or Sigma Browser cheaper?
Loyal AI is completely free, while Sigma Browser is freemium.
Do Loyal AI and Sigma Browser have free plans?
Loyal AI: Yes, fully free. Sigma Browser: Yes.
Who makes Loyal AI?
Loyal AI is made by Loyal AI.
Who makes Sigma Browser?
Sigma Browser is made by Sigma.
Which should I choose, Loyal AI or Sigma Browser?
Choose Loyal AI if you value data stays on your device and covers email, calendar and notes together. Choose Sigma Browser if you value local model keeps prompts on device and agent completes tasks on web pages.