Validate your idea before you spend a single dev dollar.
Test your riskiest assumptions with realistic product experiences. Show investors, users, and co-founders something they can actually click through.
How it's works
From idea to launch in four simple steps
A founder-friendly workflow designed for speed, clarity, and execution
Define your core hypothesis
Tell Greta the one thing you're trying to prove. What does the user need to do? What outcome confirms your idea works?
See your prototype built
Watch a realistic, interactive product experience appear — the exact flow you need to test your core hypothesis.
Run user tests fast
Put it in front of users the same day. Collect structured feedback. Find what works and what to kill early.
Build on what you learn
Double down on validated ideas. Kill what failed. Your next sprint is focused because you tested before building.
Platform
Test fast. Build less. Ship right.
Designed for founders who want to be sure before they commit engineering time.
Interactive Prototypes
Build clickable, realistic product flows that users can actually navigate and interact with meaningfully.
Hypothesis Testing
Define what you want to learn, build the minimal experience to test it, and get answers fast.
Investor Demos
Show investors a working product experience, not a slide deck. Raise on conviction, not promises.
User Testing Flows
Build structured user testing sessions with tasks, flows, and feedback collection built in.
Rapid Iteration
Change your prototype in minutes based on feedback. Run three rounds of testing in a single day.
FAQ
Got more questions?
Everything you need to know before you start building with Greta.
It's interactive and shareable — users can navigate it, click through flows, and experience it like a real product.
As many as you want. Build separate variants for A/B testing, different user segments, or competing ideas simultaneously.
Categories
Explore other categories
Greta works across every product type founders build. See what else you can create.
Build Something Real
If you can describe it, you can build it.