Published: June 11, 2025
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Here's the big idea behind @diabrowser: You know how TikTok gets better with every swipe? Dia gets more personalized with every tab you open. This is 100x more context than ChatGPT, automatically. And we believe it changes what's possible with AI. But we need your help...

First, how it works: Every time you open a new tab, Dia's memory automatically takes notes for you. It's like Granola for browser tabs. (These notes are encrypted & stored locally. We don’t take notes on sensitive pages like banking.) Here’s how to turn it on in Dia:

Image in tweet by Josh Miller

That’s it. Set it and forget it – Dia gets better the more you use it. Just browse the web like you have for decades, and Dia’s AI will quietly become more personalized in the background. So you can do everything from asking questions about your browsing history…

…or think of Dia as a co-worker who’s been browsing by your side all along — and knows what you know. It can draft documents in your voice, without you copying, pasting, or uploading a thing. Notice I don’t explain anything here — Dia just knows™:

Brainstorming is even more useful in Dia. Since Dia sees the kinds of ideas you share and read in your tabs, it can think creatively in a style that mirrors yours — and your team’s. No more uploading to context windows. Just assume you’ve got a built-in designer who gets it.

Dia can act like a coach, therapist, or advisor as well — combining the IQ of frontier LLMs with the EQ of the rich personal context (and taste) reflected in your tabs. It might feel a little weird at first, but you can now ask things like this:

Your memories in Dia – drawn from 1000s of tabs each month – are clearly a new kind of software play-doh. But we're nowhere close to discovering what it’s truly best at yet. We need your help! Tho the moment @hursh sent this from a prototype, I knew we were onto something…

Image in tweet by Josh Miller

Starting today, Arc members get instant access at http://diabrowser.com. Then turn on memory in “Early Access” settings. For now, you’ll need to manually tag @history in queries to use memory – just for now. It's temporary measure until we learn more from you all.

Why? Ask a stranger a question & even a genius can only be so helpful. Now compare to someone you’ve worked with for years – who’s been in the trenches with you all along. Dia won’t be the most powerful AI. It’ll be the most personal. The most you. https://www.youtube.com/watch?...

We have a long, long way to go. But we’re going back to our @browcompany roots, building in public alongside you. For you! It’s a new day, and we’re stoked for you to meet Dia. Come explore with us… (sound on)

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