Dia is the better app overall, scoring 8.1 to 7.9. Dia wins on 2 of the 5 scores, Grok on 3.
Office workers who juggle email, docs and meetings in the browser
X users and news followers who want fast takes on what is happening right now
Score by score
The details
| Feature | Dia | Grok |
|---|---|---|
| Category | AI Assistants | AI Assistants |
| Category rank | #12 of 16 | #15 of 16 |
| Developer | The Browser Company | SpaceXSI (formerly xAI) |
| Pricing | Free + paid plans | Free + paid plans |
| Usable for free | Yes | Yes |
| iPhone & iPad | — | ✓ |
| Android | — | ✓ |
| Mac | ✓ | — |
| Windows | ✓ | — |
| Web | — | ✓ |
Common questions
Is Dia better than Grok?
Dia is the better app overall, scoring 8.1 to 7.9. Dia wins on 2 of the 5 scores, Grok on 3.
Which is cheaper, Dia or Grok?
Dia: Free browser has no AI; Better Answers is $10 a month and Better Days $100. Grok: Free tier; SuperGrok plans from $10, with higher tiers for heavy use. On value for money, Grok scores higher.
Do Dia and Grok work on the same devices?
Only Dia runs on Mac, Windows. Only Grok runs on iPhone & iPad, Android, Web.
Which is more private, Dia or Grok?
Dia scores higher on privacy (8.2/10). History, chats and files are encrypted on your device, and Sync is end-to-end encrypted. AI partners can't train on your data. Dia keeps some unlinked content 30 days to improve itself unless you opt out.
Strengths and weaknesses
Dia
- Calm, uncluttered design from the makers of Arc
- Data is stored and encrypted on your device
- AI partners are barred from training on your data
- New users' free plan has no AI features
- Better Days plan costs $100 a month
- Windows version is still an early build
Dia comes from the team behind Arc and puts an AI chat beside your tabs that can read what's open and pull in context from Slack, Notion and Teams. Its Morning Brief, meeting prep and deck building are aimed squarely at office work. Privacy is better than most AI browsers, with your data stored on your device. Since August 2026, though, new users get no AI on the free plan, and the Windows version is still young.
Full Dia review
Grok
- Up-to-the-minute answers on news and trends
- Strong reasoning models on paid plans
- Image and video generation for subscribers
- Deepfake scandal led to probes in several countries
- Closely tied to X and its data practices
- Best models and Grok Imagine require a subscription
Grok stands out for real-time knowledge pulled from X, so it is quick on breaking news and trending topics. Paid plans add Grok 4.7 in Expert and Heavy modes, plus Grok Imagine for images and video. It is looser with content limits than most rivals, and that backfired in January 2026, when sexualized deepfakes made with Grok triggered investigations in the EU, UK and beyond. Privacy and safety remain the weak spots.
Full Grok review
