kitio.aiCanary Mail vs Sigma Browser
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Canary Mail has the lower starting price: about $3 a month, against $10 for Sigma Browser.
At a glance
Best for
Category
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- AI copilot
- Thread summaries
- Natural-language search
- PGP encryption
- Unified inbox
- Browser AI agent
- On-device Eclipse model
- Chat with page
- Deep research
- Image generation
- Built-in ad blocker
| Feature | Canary Mail | Sigma Browser |
|---|---|---|
| Best for | Privacy-focused email app with an AI copilot for writing and triage | Privacy-focused browser with an AI agent and an on-device model |
| Category | Productivity | Productivity |
| Pricing model | Freemium | Freemium |
| Starting price | $36/yr | $10/mo |
| Free plan | Yes | Yes |
| Made by | Canary Mail | Sigma |
| Based in | – | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Canary Mail has the lower starting price: about $3 a month, against $10 for Sigma Browser.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
Free
Free
- Unified inbox
- Read receipts (lite)
- Snooze, pin and templates
Growth
$36/yr
- AI Copilot
- Read receipts and send later
- Calendar and scheduling
- Inbox cleaner
Pro+
$100/yr
- Everything in Growth
- PGP and SecureSend encryption
- Phishing and impersonation detection
- Priority support
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
Canary Mail
- Works with many providers
- Encryption support
- Affordable plans
- Less polished than top rivals
- Some features Apple-first
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 Canary Mail if you want:
- Works with many providers
- Encryption support
- Affordable plans
Watch out: less polished than top rivals.
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.
Canary Mail vs Sigma Browser FAQ
What is the difference between Canary Mail and Sigma Browser?
Canary Mail: Privacy-focused email app with an AI copilot for writing and triage. Sigma Browser: Privacy-focused browser with an AI agent and an on-device model. Both are productivity tools.
Is Canary Mail or Sigma Browser cheaper?
Canary Mail has the lower starting price: about $3 a month, against $10 for Sigma Browser.
Do Canary Mail and Sigma Browser have free plans?
Canary Mail: Yes. Sigma Browser: Yes.
Who makes Canary Mail?
Canary Mail is made by Canary Mail.
Who makes Sigma Browser?
Sigma Browser is made by Sigma.
Which should I choose, Canary Mail or Sigma Browser?
Choose Canary Mail if you value works with many providers and encryption support. Choose Sigma Browser if you value local model keeps prompts on device and agent completes tasks on web pages.