Founder · Investor · Creator — Dubai

Building companies. Creating leverage. Investing in the future.

I’m Mark Priest. I build companies, back founders I believe in, and share what I’m learning as I go. This site is less a résumé and more a record of the work, and the person behind it.

Read My Story See What I’m Building

Mark Priest in Dubai, standing by an orange McLaren with its door open

The Story

I didn’t start with a plan. I started with a problem.

I was born in Hungary, and I build companies for the same reason most founders do: I couldn’t find anyone else solving the problem in front of me. There was no grand strategy. Just a willingness to figure it out, and enough stubbornness to stay with it longer than made sense.

In 2024 that became my company, PRST LLC. FZE. In 2025 I moved to Dubai to build it properly. Today it runs two projects: OuterProof in cybersecurity and PRST.tech in quantum software. The pattern is simple: build where I can, back people where I can’t.

What hasn’t changed is the way I think about time. I’d rather spend five years on something that compounds than five months on something that trends. That’s the thread running through everything on this site.

I’d rather build something slowly and own it forever than build something fast and lose it.

— Mark Priest

What I believe

A short list of things I keep coming back to, in business and outside of it.

Ownership over optics

I’d rather own something real and unglamorous than rent something that photographs well. Equity in the right thing beats attention every time.

Depth over speed

Most things worth building take longer than you want them to. I’ve stopped fighting that and started planning around it.

People before plans

Everything I’ve built has come down to one or two people I trusted completely. The plan changes. The people rarely do.

Say less, ship more

I try to let the work speak first. If I’m talking about something more than I’m building it, that’s usually a sign to go quiet and get back to it.

What I’m building

Two projects from one company, PRST LLC. FZE. I show up to both every week.

01Security

OuterProof

Started because I kept seeing smaller software companies stall enterprise deals over security questions they couldn’t answer. Now it watches what their domains expose to the internet and turns it into plain-English fixes and the evidence to pass a security review.

Live · outerproof.com

02Quantum

PRST.tech

Started because quantum computers are improving faster than the software written for them. PRST.tech researches quantum algorithms and programming tools, and the problems they could solve, from new medicines to cleaner energy.

Live · prst.tech

Both are projects of PRST LLC. FZE., Dubai, UAE.

Every company on this site started as a problem I couldn’t stop thinking about.

— Mark Priest

The Circle

Some things aren’t listed. They’re discovered.

Investing

How I back founders

When I back a company, I’d rather write a smaller check into fewer companies and actually be useful to the founder, not just show up on a cap table.

Operating leverage

Businesses that get meaningfully more efficient with every dollar of revenue they add.

Founders who’d build it anyway

People who were already solving the problem before there was a business case for it.

Decade thinking

I ask founders where the company is in ten years, not ten months. The answer tells me a lot.

The Long Game

I’m not trying to build the biggest thing. I’m trying to build the thing that’s still here in twenty years.

That means slower decisions sometimes. Fewer companies. More time in the room with the people actually doing the work. If that’s the kind of long game you’re playing too, I’d like to hear from you.

Contact

Say hello.

For partnerships, press, or just to talk shop, reach out directly. I read everything myself.

Emailoffice@mark-priest.com

Based inDubai, UAE

Response time2–3 business days