Side by side
SigmaOS vs Tabbit
Both stand on web browsers. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan Mac
SigmaOS offers a macOS browser with built-in blocking, extension support, synchronization, and tiered assistant access. Its main choice is between the free Basic limits and monthly plans with broader assistant usage.
Visit SigmaOS Free plan MacWindows
Choose Tabbit if you want an AI browser that can work with browsing context, organize tabs, and automate tasks. Look elsewhere if you need Linux or mobile support, or if you need top models and scheduled tasks without the Pro plan.
Visit TabbitThe facts
| SigmaOS | Tabbit | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | Mac | Mac, Windows |
| Lowest paid plan | See the plans | Pro: $30 a month |
| Plans published | 3 | 3 |
| Maker | SigmaOS | Not published |
| Website | sigmaos.com | tabbit.ai |
| On web browsers | #116 of 154 | #112 of 154 |
SigmaOS: what it does well
- Free Basic plan is available
- Built-in ad blocking
- Supports browser extensions
- Cross-device sync is listed
- Runs on macOS desktop
What to know first
- Limited to macOS
- Basic has limited Airis Assistant access
- Paid plans start at $20 a month
- Personal Max costs $30 a month
Tabbit: what it does well
- AI chat can use tabs, local files, highlights, and screenshots as context.
- Agent can automate complex tasks such as shopping and academic research.
- Tab groups can be previewed and used as a chat knowledge base.
- Favorites save webpages, summaries, text, and images in folders.
- Reusable Skills can be created from completed Agent workflows.
What to know first
- The free plan excludes top models and scheduled tasks.
- Full Agent capabilities and 10 scheduled tasks require Pro at $30 a month.
- It runs on macOS 12+ and Windows 10+; Linux and mobile are on the roadmap.
Alternatives to SigmaOS Alternatives to Tabbit The whole list