The Prototype Builder Made for Founders Who Validate First
Build prototypes that validate your idea before you build it. Greta is the founder's prototype platform.
The Problem
The real challenge with building prototype or validation builds
Most founders building prototypes & validation builds products run into the same wall: the gap between what they can envision and what they can build is massive. The vision is clear. The execution is blocked by spending months building products that fail because the core assumption was never validated.
The traditional path — hire engineers, write specs, wait for sprints, review builds, revise — takes months. By the time you have something real to show users, the market has shifted, your assumptions have changed, and your runway is shorter. You've built the wrong thing with the right intentions.
The problem isn't your idea. The problem is the system you're using to bring it to life. Prototypes & Validation Builds products deserve a better path from concept to shipped product.
Why Current Tools Fall Short
Why existing tools fail Prototypes & Validation Builds founders
The tools that exist today were built for different personas. Design tools like Figma produce beautiful screens that can't be tested with real users. No-code tools like Figma and InVision are powerful but take weeks to learn and months to master for prototypes & validation builds workflows.
Generic website builders weren't built for prototypes & validation builds products. They produce marketing sites, not product experiences. When you try to build user flow prototypes or concept demos with them, you hit the limits quickly.
The result is a choice between expensive engineering, slow no-code platforms, or shipping something that doesn't match your vision. Founders deserve a third option: a tool designed specifically for their use case that gets out of the way and lets them build.
The Greta Approach
How Greta solves prototypes & validation builds building
Greta is built around a simple principle: founders should be able to test your riskiest assumptions with a real interactive product before investing in full engineering. The platform handles the complexity of building polished, production-quality prototype or validation builds so you can focus on the product thinking, not the implementation.
Unlike design tools, what you build in Greta is interactive and testable by real users immediately. Unlike traditional no-code tools, Greta doesn't require weeks of setup or a specialist to operate. You describe what you want. Greta builds it. You iterate and ship.
The platform is specifically designed for Prototypes & Validation Builds products — which means it understands interactive prototypes, hypothesis testing, investor demos, and more. You're not adapting a generic tool to your use case. You're using a tool built for exactly what you're doing.
How to Build
How to build your prototypes & validation builds with Greta
Describe your prototype or validation build
Open Greta and describe what you want to build. Tell it who your potential users and early adopters are, what they need to do, and what the core experience should feel like. Plain English works perfectly.
See it built in real time
Watch your prototype or validation build take shape on screen. Greta generates screens, flows, and UI components tailored to Prototypes & Validation Builds use cases — not generic templates.
Customize and refine
Adjust layouts, change copy, add new sections, or remove what doesn't fit. Every change takes minutes, not days. Iterate until it's exactly right.
Test with real users
Share a link with your potential users and early adopters. Watch how they interact, collect feedback, and identify what to improve. No app store, no deployment pipeline, no delay.
Iterate based on feedback
Take what you learned and apply it immediately. Run a second round of testing the same day. Most founders run 3–4 test rounds before their first launch.
Ship to production
When you're ready, deploy your prototype or validation build to production. Add real backend connections, integrate your existing tools, and open it up to your full user base.
Use Cases
What you can build
MVP Validation
Build a minimal interactive product that tests your core value proposition with real users before any engineering investment.
Investor Demo
Create a compelling product demo that shows investors a real, interactive experience rather than static slides.
User Research
Build specific flows to observe how users navigate, what confuses them, and what delights them.
Feature Validation
Prototype a new feature before adding it to your roadmap. Validate it with users first.
Design Exploration
Build multiple design variations quickly and test which approach users prefer.
Stakeholder Alignment
Create a working product demo that gets everyone on the same page before engineering begins.
Feature Map
What Greta gives you for prototypes & validation builds
Comparison
Greta vs. other prototypes & validation builds tools
Templates
Start with a Prototypes & Validation Builds template
Don't start from scratch. Browse Greta's marketplace of prototypes & validation builds templates built by founders for founders. Find the closest match to what you're building and customize from there.
Templates in the marketplace are production-tested by other founders. They're not design mockups — they're working product experiences you can deploy immediately and modify as needed.
Browse TemplatesFAQ
Frequently asked questions
Ready to build your prototypes & validation builds product?
Start building today. No engineering team required.