Pick Tabula if
Your work spans several sites and you want them side by side on one canvas instead of in tabs.
The catch. It runs on macOS only, it is closed source, and it is newer than everything else here.
Tabula vs Dia
Tabula is best for seeing many sites at once. Dia is best for AI in the browser.
Pick Dia if
You want an assistant that reads your tabs and does writing and research with you.
The catch. It needs an Apple Silicon Mac on macOS 14 or later, and its best AI features are paid.
Tabula vs Dia, feature by feature
| Tabula | Dia | |
|---|---|---|
| Engine | Chromium | Chromium |
| Vertical tabs | On by default | Yes |
| Sites on screen at once | As many as you arrange, on a canvas | Two or more, in Split View |
| Separate workspaces | Zones — two free, unlimited on the paid plan | Profiles, each in its own window |
| Ad and tracker blocking | Built in, ads and trackers | Built in, ads and trackers |
| Extensions | Chrome Web Store | Chrome Web Store |
| Platforms | macOS | macOS (Apple Silicon) |
| Open source | No | No |
| Price | Free; $9.99/month for unlimited zones | Free; Dia Pro $20/month |
| Development | Active | Active |
Questions
Is Tabula better than Dia?
Neither wins everywhere. Tabula is best for seeing many sites at once; Dia is best for AI in the browser. Pick Tabula if your work spans several sites and you want them side by side on one canvas instead of in tabs. Pick Dia if you want an assistant that reads your tabs and does writing and research with you.
Do Tabula and Dia block ads?
They block the same way: built in, ads and trackers.
Which extensions do Tabula and Dia run?
Both install extensions from the Chrome Web Store.
Where do Tabula and Dia run?
Tabula: macOS. Dia: macOS (Apple Silicon).
Are Tabula and Dia free?
Tabula: Free; $9.99/month for unlimited zones. Dia: Free; Dia Pro $20/month.