kitio.aiSpark Mail vs Muddy
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Spark Mail starts at $10/mo and Muddy starts at See pricing page. 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
- Smart inbox
- Spark +AI writing
- Email summaries
- Gatekeeper for new senders
- Shared threads
- Shared multiplayer views
- AI tab organization
- Rewind across apps and chat
- Universal commenting
- Built-in messaging
| Feature | Spark Mail | Muddy |
|---|---|---|
| Best for | Smart email client with AI writing, summaries and team sharing | Multiplayer browser for teams with shared views and AI tab sorting |
| Category | Productivity | Productivity |
| Pricing model | Freemium | Freemium |
| Starting price | $10/mo | See pricing page |
| Free plan | Yes | Yes |
| Made by | Readdle | Muddy |
| Based in | Ukraine | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Spark Mail starts at $10/mo and Muddy starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
4 plans
Free
Free
- Smart Inbox
- Unlimited email accounts
- Calendar
- 5 AI meeting notes (lifetime)
Plus
$10/mo
- Per user
- Spark +AI assistant
- 40 AI meeting notes/month
- Advanced productivity
Pro
$20/mo
- Per user
- Unlimited AI meeting notes
- Autopilot and auto-drafts
- Read statuses
Enterprise
Contact sales
- Security and controls
- Dedicated success manager
- 1:1 productivity coaching
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
Spark Mail
- Works with any email provider
- Free plan for individuals
- Good team collaboration
- Mail passes through Spark servers
- Best AI features are paid
Muddy
- Comments work on any website
- Rewind through past work
- Shared views reduce app switching
- Pricing not shown
- Requires teammates to switch browsers
- Details of AI features are limited
Which one should you choose?
Choose Spark Mail if you want:
- Works with any email provider
- Free plan for individuals
- Good team collaboration
Watch out: mail passes through spark servers.
Choose Muddy if you want:
- Comments work on any website
- Rewind through past work
- Shared views reduce app switching
Watch out: pricing not shown.
Spark Mail vs Muddy FAQ
What is the difference between Spark Mail and Muddy?
Spark Mail: Smart email client with AI writing, summaries and team sharing. Muddy: Multiplayer browser for teams with shared views and AI tab sorting. Both are productivity tools.
Is Spark Mail or Muddy cheaper?
Spark Mail starts at $10/mo and Muddy starts at See pricing page. Check both pricing pages for current plans.
Do Spark Mail and Muddy have free plans?
Spark Mail: Yes. Muddy: Yes.
Who makes Spark Mail?
Spark Mail is made by Readdle, based in Ukraine.
Who makes Muddy?
Muddy is made by Muddy.
Which should I choose, Spark Mail or Muddy?
Choose Spark Mail if you value works with any email provider and free plan for individuals. Choose Muddy if you value comments work on any website and rewind through past work.