Hello! 👋 Welcome to our little corner of the internet.
We’re Blok - a team of exited founders, Stanford/Harvard/Berkeley researchers, and AI engineers building the future of product development.
Between us:
🧠 We've modeled human behavior for national security.
📱 We’ve launched consumer apps used by millions.
🧪 We've led frontier research across behavioral science, healthcare, and finance.
Now, we’re applying that experience to one big question:
How can teams build better digital products - faster, smarter, and with less guesswork?
The problem with product development today
The way we build software products today is broken. With the rise of chat and voice interfaces, visual UI has a higher bar to clear than ever before. Users expect simplicity, fluidity and personalization and it has become increasingly obvious when a product experience feels clunky.
The result is product teams are under pressure to learn quicker, and act with higher precision to avoid introducing unnecessary friction into the product experience. But the old tools aren’t keeping up.
Product decisions today involve too much manual orchestration with slow A/B tests and complex problems squeezed into static rule-based logic. Larger teams with access to higher traffic volumes rely on brute force trial-and-error on real-life users, until something sticks. Smaller teams with less product usage, give up battling with sample sizes and statistical methods, so rely on gut feel and hope they’re right.
In a scramble to remain relevant, many teams stretch themselves across too many use cases, user personas and workflows. The problem is we’re working with limited screen real estate, and every new capability needs a place to live, so we end up with complex interfaces, bloated with features. We pile on tabs, modals, toggles and nested menus and hope users can find their way. You end up unable to serve anyone particularly well.
We are at an inflection point. We’re entering a new era of AI-first/agentic product development, to help deliver on the promise of personalization at scale.
Meet Blok: test with virtual users before you ship
With Blok, you can simulate how real users will behave - before launch.
We generate virtual users modeled off your actual product behavior. These AI-powered personas stress-test your onboarding, flows, and features in minutes. Not weeks.
No more waiting for statistical significance. No more launching blindly.
Just instant insight, powered by behavioral simulation.
Product, design, and growth teams are already using Blok to:
- Predict conversion lift from design changes
- Compare control vs. variant flows before launch
- Simulate friction points for different personas
- Ship faster with fewer costly mistakes
You can read more about how customers today are using us to move faster and reduce the time-to-insight period.
📣 We’ve raised $7.5M to define a new category
We’ve quietly raised a $7.5M seed round from:
- MaC Venture Capital & Protagonist
- Rackhouse, WeekendFund, Blank, Correlation and Karman
- Angels from Meta, Airbnb, Google, Pinterest, Discord, and more...
The message is clear: product development is changing and Blok is helping define what comes next.
Try Blok today
We're seeing massive interest from teams building across SaaS, fintech, healthcare, and ecommerce
If you're shipping features into the unknown - and want to test, learn, and move faster book a demo. We’ll show you how Blok works and spin up a custom simulation for your product.
Join the team
We’re hiring engineers, researchers, and product thinkers to help define the next era of AI-first product development.
We’re a small, high-caliber team.
We care deeply about science, design, and speed.
And we're just getting started.
Thanks for reading.
This is just Day 0.
Let’s build better products, together.