CO-FOUNDER AND CTO
Martina Zrnec
Building Stacklist: the knowledge layer for the AI-first web, from Zagreb to NYC and back.
Key facts
- Role
- Co-founder and CTO
- Company
- Stacklist
- Based in
- Zagreb, Croatia
- Podcast
- Building Stacklist
ABOUT MARTINA
Co-founder and CTO of Stacklist
Martina Zrnec is the co-founder and CTO of Stacklist, the platform that turns saved content into structured, AI-readable knowledge. She leads product engineering and is the architect behind the Atomic Content Protocol (ACP), an open standard that lets AI agents read and cite curated content without re-parsing the whole web.
Before co-founding Stacklist, Martina built software across Europe. Today she splits her time between Zagreb, Croatia and wherever the product demands her attention. She joined the Blue Startups cohort in Hawaii as part of the company's growth chapter, and co-hosts the Building Stacklist podcast alongside co-founder Kyle, documenting the unvarnished reality of building a startup from scratch.
Her day-to-day covers everything from hands-on engineering and team leadership to investor conversations, content strategy, and community. She is a builder first, a systems thinker always, and a firm believer that the next version of the web belongs to curators.
Quote
The next version of the web belongs to curators. We are building the infrastructure that makes curation legible to both humans and machines.
JOURNEY
How Martina got here
- Early career
- Software engineering across EuropeBuilt and shipped products across multiple European startups and teams, sharpening a focus on systems architecture and product thinking.
- Blue Startups, Hawaii
- Accelerator cohortJoined Blue Startups in Hawaii as Stacklist scaled: a turning point for the company's growth strategy and investor network.
- Stacklist
- Co-founder and CTOCo-founded Stacklist alongside Kyle. Leads all of engineering and product, and is the primary architect of the Atomic Content Protocol (ACP).
- Building Stacklist podcast
- Co-host with KyleAn honest, unfiltered show about what it actually takes to build a startup from scratch, released alongside the product itself.
FEATURED STACKS
What Martina is building and curating
19My AI Builder Stack
The tools, platforms, and infrastructure I rely on as an AI builder — from coding IDEs (Cursor, Windsurf) and AI models (OpenAI, Claude) to agent frameworks (LangChain, Hermes), deployment infra (Vercel, Railway, Daytona), data & search (Pinecone, Firecrawl, Jina, Apify), voice A
13Basketball Courts to Play in Croatia
This curated collection is your ultimate guide to discovering the best outdoor and indoor basketball courts across Croatia, perfect for travelers and basketball enthusiasts. It features iconic locations like the world-famous Dubrovnik City Wall Rooftop Court, alongside top courts in Zagreb, Split, and Zadar. Whether you're looking to hoop with a stunning sea view or explore Croatia's vibrant basketball culture, this resource provides essential information to find your next game.
14Startup or Geeky Series / Movies
This curated collection features 14 compelling TV series and movies, perfect for anyone looking to dive into the world of startups, technology, finance, and geek culture. Designed to inspire and engage, it's an essential resource for aspiring entrepreneurs, developers, tech enthusiasts, and business leaders seeking content that puts them in 'startup/execution/developer mode'. Discover stories of innovation, hacking, entrepreneurial journeys, and financial sagas, from the rise of tech giants to groundbreaking market disruptions.
FAQ
Questions about Martina and Stacklist
What is Stacklist and what does Martina do there?
Stacklist is a knowledge curation platform that makes saved content structured and discoverable by both humans and AI engines. Martina is the co-founder and CTO: she leads engineering, product architecture, and is the primary author of the Atomic Content Protocol (ACP).
What is the Atomic Content Protocol (ACP)?
ACP is an open standard co-created by Martina and the Stacklist team. It wraps any piece of content in a structured envelope (tags, summary, key entities, classification) so AI agents can read and cite it in roughly 200 tokens instead of re-parsing thousands of tokens of raw HTML.
Where is Martina based?
Martina is based in Zagreb, Croatia. She has also spent time building Stacklist in Hawaii as part of the Blue Startups accelerator cohort.
Does Martina have a podcast?
Yes. She co-hosts Building Stacklist with Kyle, an honest, unscripted show documenting the startup journey: fundraising, product decisions, team growth, and everything in between.
Get in touch with Martina
Founder intros, podcast pitches, partnership ideas, or just to say hi.