Good questions!

> But is this one of those "let's build everything in rust since it's super-fast"? (I HOPE so actually).

No. It's not written in Rust. Language choice would have literally nothing to do with making IMAP/the email experience any faster. I don't want to make any firm claims as we've yet to do serious benchmarking, but what we've built is _much_ faster than Mail.app, let alone Gmail.

The tech we've chosen, and the actual app itself, essentially _feels_ like Linear for email.

> I feel there might be a market for a fully native MODERN and OS-native looking mail client (alternative to at least Mac Mail, but actually fast with search that is actually useful).

Yes, this is what we're building, but a bit beyond that. It's completely cross-platform: web, Mac, Windows, iOS, Android, Linux. Any N number of clients a user might have running will seamlessly and instantly sync, given network availability. That said, each client is also fully offline-first.

There _is_ a market for this. It's been a nasty problem to solve, but we have a massive waitlist.

Superhuman has achieved great success (although being an over-valued VC org) but only support Google + Microsoft _via_ API access.

Notion launching their product is further validation that there's a lot of space in this market.

But Marco is quite different. We're building a cross-platform IMAP-primitive email client that gets the basics right. It'll work with any email provider that supports IMAP (basically all). We're not pushing or even _building_ any "AI" stuff yet.

I wrote a blog post detailed our motivations here:

https://marcoapp.io/blog/marco-an-introduction

Let me know if you have any follow-up questions.