Your idea. Our sun.
Working software.
Bring us a seed — a spec, a screenshot, an idea on a napkin.
Autonomous AI agents validate, iterate, and deliver your product.
No human-written code. No code reviews. Just software that works.
The Process
Seed to Sunrise
Four stages. Zero human code. Autonomous agents that compound correctness with every iteration.
Seed → Validation Harness → Feedback Loop → Ship
Tokens are the fuel.
Seed
Plant the idea
Every project starts from a seed. A product spec, a napkin sketch, a screenshot, an existing codebase — whatever form your vision takes, we turn it into structured inputs our agents can act on.
Validate
End-to-end harness
No unit tests. We build scenario-based validation harnesses that mirror your real environment — customers, integrations, economics. LLM judges evaluate satisfaction, not just pass/fail.
Feedback Loop
Self-correcting
Output feeds back into input. The system compounds correctness with every iteration. Agents run scenarios, analyze failures, and converge — autonomously — until holdout scenarios pass consistently.
Ship
Working software
When scenarios pass, software ships. Not a prototype, not an MVP that needs rebuilding — production-grade code, validated against real-world conditions, ready for your users.
Why Sunyday
A new way to build software
The economics of software changed. What was unfeasible before is now routine.
No Human-Written Code
Autonomous agents generate every line. This isn't vibe coding or copilot-assisted development — the entire codebase is machine-authored, validated, and shipped.
No Code Reviews
Instead of humans reviewing code, validation harnesses prove correctness. End-to-end scenarios run against Digital Twin environments — thousands of scenarios per hour.
Compound Correctness
Each iteration makes the system smarter. Feedback loops mean errors don't accumulate — they self-correct. The output feeds back into the input until holdout scenarios pass.
Built for startups
Ship in days, not months
Your MVP isn't a throwaway. It's production-grade code validated against real scenarios.
Fraction of the cost
Tokens cost less than engineering salaries. Get a full product for what you'd pay one senior dev.
Iterate at machine speed
Changed your mind about a feature? Agents regenerate and revalidate in hours, not sprints.
Real validation, not vibes
Probabilistic satisfaction scoring across user journeys. Not 'it works on my machine.'
Pricing
Tokens, not timesheets
Pay for output, not hours. Our agents work 24/7 at machine speed.
Validate your idea
Spark
A functional prototype built by our factory. Perfect for validating with users before going all-in.
- Seed intake & structuring
- Core feature set (3-5 screens)
- Scenario-based validation
- Deployed & accessible
- 1 round of iteration
Build your product
Sunrise
Full product development powered by the factory loop. Continuous iteration until your scenarios pass.
- Everything in Spark
- Full product scope
- Digital Twin validation
- Continuous feedback loops
- Production-grade output
- Unlimited iterations
- Priority support
Scale your company
Solar
Enterprise-grade factory engagement. Multiple products, ongoing evolution, dedicated infrastructure.
- Everything in Sunrise
- Multiple product lines
- Custom DTU environments
- Dedicated agent fleet
- Architecture guidance
- SLA guarantees
- Quarterly business reviews
Ready to build in the sunlight?
Tell us about your idea. We'll show you how the factory turns it into working software.