Overview
ChatPDF and Dia are both AI Search tools, but they take different approaches. ChatPDF: Upload a PDF and ask questions or get a summary from an AI chat. Dia: AI-native browser from The Browser Company where you chat with your tabs and automate browsing with skills.
Not every plan here is sold as a flat monthly price — check each official pricing page for current plans. Both offer a free plan, so you can try each before paying.
Which one fits depends on your workflow and budget. The table below lines up the verified facts, and the interactive comparison lets you put ChatPDF, Dia, and any other tool side by side.
Side-by-side comparison
| ChatPDF | Dia | |
|---|---|---|
| Starting Price | See pricing | See pricing |
| Free Plan | Yes | Yes |
| Free Trial | No | No |
| Pricing Type | Freemium | Freemium |
| Supported platforms | — | — |
| Web | — | — |
| Mobile | — | — |
| API | — | — |
| Categories | AI Search | AI Search |
At a glance
Choose ChatPDF if…
- its focus matches what you're building — see the overview above
Choose Dia if…
- its focus matches what you're building — see the overview above
Alternatives worth considering
Other tools in the same category.
AI answer engine with cited, up-to-date sources.
Best for Research questions that need cited sources
Google's AI research assistant that summarizes and answers questions from your own documents.
AI search engine that answers questions using findings from research papers.
AI research assistant for finding, summarizing, and extracting data from papers.
Frequently asked questions
Which is cheaper, ChatPDF or Dia?
At least one of them doesn't sell a flat monthly plan, so there's no single number to compare — check both official pricing pages.
Do ChatPDF and Dia have free plans?
Yes — both offer a free plan you can start with.
Do ChatPDF and Dia offer free trials?
Neither lists a free trial.
Which is better, ChatPDF or Dia?
There's no single answer — it depends on your use case and budget. Compare the verified facts above, then open the interactive comparison to line ChatPDF and Dia up with any other tools you're considering.
Can I use ChatPDF and Dia together?
Yes — nothing stops you from using both, and many people combine tools for different tasks. Add ChatPDF and Dia to the AI stack builder to see what the combination costs per month.
What are alternatives to ChatPDF and Dia?
Popular alternatives include Perplexity, NotebookLM, Consensus, Elicit, You.com — each has its own detail page on ToolScanner with verified pricing.
Where can I verify current pricing for ChatPDF and Dia?
On each official website — providers change prices and plans at any time. ToolScanner shows the monthly-billing price as of our last verification, with the date on each tool's page.