DEV.co
Rapid Prototype Development

Prototypes that actually work.

Not Figma. Not a slide deck. Real, clickable, deployable software you can put in front of users this week — and learn from before you commit to building the full MVP.

Fixed-fee · 1–3 week sprints · You own the code · Deployed and shareable

Three different deliverables. Don't pay for the wrong one.

“Prototype” gets used to mean a Figma file, a half-built MVP, and everything between. We're more precise.

MockupPrototypeMVP
What it isVisual design with click-throughWorking software on real infraLaunchable product users pay for
Where it livesFigma, InVisionA deployed URLA real product with auth, billing
Typical timeline1–2 weeks1–3 weeks4–8 weeks
Typical cost$3K–$15K$9.5K–$32K$24K–$84K
Best forValidating a visual directionValidating an idea in useValidating revenue
Code reuseNoneSome — carries to MVPAll — built to scale

Pick the prototype scope that matches your question.

Spark
1 week
from $9,500
  • One user flow, fully clickable
  • Up to 5–7 screens
  • Frontend + mocked backend, deployed
Start a Spark
Sprint
2 weeks
from $18,000
  • 2–3 connected flows, 12–15 screens
  • Frontend + light backend with real endpoints
  • Realistic seeded data + login mock
Start a Sprint
Stretch
3 weeks
from $28,000
  • 3–5 flows, 20+ screens
  • Working backend with real persistence
  • Mock auth + custom branding
Start a Stretch

Three valid outcomes from a prototype sprint.

Validate, then build the MVP

The prototype confirms the idea works. Some code carries forward. The MVP build is faster because the unknowns are gone.

Kill the idea, save the budget

The prototype reveals the idea doesn't work as you thought. You spent $9.5K–$28K instead of $50K+ on the wrong MVP. A good outcome.

Pivot the scope, new prototype

The direction validates but the specifics don't. We re-scope and run a second short prototype.

Common questions.

Is a prototype the same as an MVP?
No. A prototype answers 'would this work?' — an MVP answers 'will people pay for this?' Prototypes are throwaway-tolerant; MVPs are built to scale.
Will I get the code?
Yes — full source in a repository you own, with day-one access.
Can the prototype scale?
No, by design. A prototype prioritizes speed of iteration over scale. If you need scale, you need an MVP.
How is this different from a Figma mockup?
A Figma mockup is a visual; a prototype is functional software. Users can click through, fill forms, see realistic data flow, and interact with the product.
Is the code throwaway?
Not necessarily. Sprint and Stretch packages often produce code that carries into the MVP build. Spark is more throwaway by design.
Can I show it to investors?
Yes. The Stretch package is built for that — custom branding, mock auth that survives sessions, realistic data.

Got an idea? Let's make it clickable.

A 20-minute call to scope the prototype. We'll tell you which package fits, what we'd build, and what you'd learn from the test.