3 packages · 3–7 working days

See your app idea in 5 days — before spending €20k+ on development.

We turn your idea into a fully clickable prototype with real flows, real content, and developer-ready handover — so you can validate, pitch, and build with confidence.

DACH partner: Nekxsum
// What you get

A prototype an AI builder won't make.

  • Every screen your idea needs
  • Your theme, colors, and concept logo
  • Developer handover doc included
  • Strategic feedback on your idea
  • Mobile + desktop responsive
  • Hosted, shareable, yours to keep
Stephen Pelkey
★★★★★
"Saved us months of guesswork. We could actually demo the idea to industry partners before committing to a full build." Stephen Pelkey · President, Atlas Fireworks
Why this matters

Don't build blind.

Most teams waste months and thousands building something they later change. We help you see your product first — so you make better decisions before writing a single line of code.

Not just another AI prototype.

We push back.

If your three features are too many or your user is too vague, we say so. AI builders don't.

We design.

No generic AI templates. Your colors, your concept logo, every screen designed for your idea.

We hand off cleanly.

Developer handover doc included. Your dev team picks it up and builds. No reverse-engineering.

Where we serve

Local in DACH, direct everywhere else.

DACH Partner
Germany · Austria · Switzerland

For teams in Germany, Austria and Switzerland: our local partner Nekxsum handles German-language sales calls, scoping discussions and onboarding. You get a local point of contact in your timezone — we handle the build.

US & Worldwide
Worldwide delivery
Direct service in USD

For teams in the US, UK, Canada and worldwide: we work with you directly via email and scheduled video calls. USD pricing, US-friendly call hours (8am–11am EST / 5am–8am PST), and async-first communication so you keep moving in your timezone.

What we prototype

Web app, mobile, or both.

Whatever your idea needs — a customer-facing app, the admin panel behind it, a SaaS dashboard, or all of them combined. The screen budget in your package covers the total across whatever platforms you choose.

Public-facing
Web App
Marketing site, customer portal, signup flow, browse-style products.
iOS & Android
Mobile App
Onboarding, feeds, profile, swipe and tap interactions, push-style flows.
Internal team
Admin Panel
Tables, filters, role-based views, moderation, ops tooling, analytics.
B2B
SaaS Dashboard
Charts, KPIs, settings, user management, billing, multi-tenant flows.
Most common
Combo
Mobile app + admin panel, web app + SaaS dashboard, or any other mix.
Who this is for

Built for people with a new idea.

If you're investing real money or time into building something digital, you should see it first. Four kinds of people use Protobuild.

Startup founders

Validating an idea before raising or building.

Companies launching new products

Existing businesses planning a digital expansion.

Teams before hiring developers

Brief your future dev team or external agency precisely.

Agencies planning client builds

Show clients the build before quoting full development.

Packages
Currently accepting 3 new briefs this week · 2 spots left

Pick the level of seriousness.

All packages include the full prototype — every screen, your colors, your concept logo. Higher tiers add strategy, polish, more revisions, and richer handover.

Validate
Starter
For early ideas that need clarity.
Best for Validate a new idea before building
🔥 52% off – first 30 clients
€199 €95.00
$95 USD
  • 30-min strategy call before we build
  • Full clickable prototype — up to 15 screens
  • Your theme + colors
  • Concept wordmark logo
  • 2 revision rounds (multiple tweaks per round)
  • Mobile + desktop responsive
  • Hosted shareable link + source files
  • Async communication via email
  • 3 working days turnaround
Build
Pro
For products ready to build.
Best for Brief your dev team before €20k+ build
€650.00
€650 EUR
  • Everything in Growth
  • Unlimited screens within reasonable scope
  • Logo concept: wordmark + mark + 2 variants
  • 5 revision rounds (multiple tweaks per round)
  • Full developer handover doc (architecture, schema, components)
  • 60-min strategy call after delivery
  • Tech stack & budget recommendations
  • Email + WhatsApp + 2 video calls (Zoom or Meet)
  • 7 working days turnaround
  • Fee credited if you build with us
"

About revisions — what counts as a "round"

Each round is one batch of feedback you send together. Bundle multiple tweaks into a single round to make the most of it. We'll keep iterating until it's right within your package's rounds. Bigger scope changes (new sections, new flows) are quoted separately.

Side-by-side

What's in each package.

Starter
€199 €95
Growth
€349
Pro
€695
ScreensUp to 25Unlimited (reasonable scope)
Theme & colors
Concept logoWordmarkWordmark + mark + 2 variants
Realistic content
Pitch-deck screenshots
Revision rounds25
Developer handover docFull (architecture, schema, components)
Strategy call30 min · before60 min · after
CommunicationEmailEmail · WhatsApp · 2 calls (Zoom/Meet)
Mobile + desktop responsive
Hosted link + source files
Turnaround3 working days7 working days
Credit toward full build✓ Full €750 credited
The honest comparison

"Why not just use Lovable or Bolt?"

Fair question. Here's what you actually get for €325 that an AI builder won't give you for €20/mo.

AI builders alone

Lovable, Bolt, Replit, Cursor
  • Generic output that looks like every other AI app
  • You learn prompting, debugging, and hosting yourself
  • No pushback when your scope is too big or vague
  • Lorem ipsum and stock placeholder content
  • No handover doc — the AI is the developer, sort of
  • You're the designer, the engineer, and the strategist

Protobuild + AI

Designed by humans, accelerated by AI
  • Custom design that looks like it was made for your idea
  • You write a brief. We handle everything else.
  • We push back on weak ideas before we build
  • Realistic content that makes the prototype feel real
  • Clean handover doc your dev team can pick up and run with
  • A team that has shipped real products for real businesses
The process

From idea to handoff-ready, in a working week.

01
Brief
Pick a package. Tell us your idea, your user, the screens you imagine. Takes ~8 minutes.
Day 0
02
Confirm & pay
We confirm scope and send the invoice. You pay via Stripe. We start the same day.
Day 0–1
03
Build & iterate
Custom-designed clickable prototype, your colors, concept logo. Revisions until it's right.
Days 1–6
04
Hand off
Hosted link, source files, handover doc. Your dev team can pick it up. Optional strategy call.
Day 3–7
Sample work

What a Protobuild prototype looks like.

Each one was a full clickable prototype with theme, concept logo, and handover doc.

Hi, Jamie3 shifts available
3
Open
Mine
Past
St. Mary's ICU $48/hr
Today · 7am–3pm · 8h
Memorial ER $55/hr
Tomorrow · 11pm–7am
Cedar Care $42/hr
Fri · 3pm–11pm · 8h
Healthcare · Mobile App
Nurse staffing app
Onboarding, shift browse, accept flow, profile, payments, history.
Revolt Shaves web mockup cover on green Green background with a browser window showing the Revolt storefront homepage. revoltshaves.com R REVOLT Shop Wholesale About Cart THE WATERLESS SHAVE Shave anywhere. No water. Shop now REVOLT LUBRICATING
Marketplace · Web + Admin
Revolt Website
Revolt is a patented waterless shaving system that works with any razor — even electric.
Soilsense.app
Dashboard
12
Open orders
47
Samples this wk
8
Field agents
3
In transit
Hi Sean · #2847
North · R4
Centre · R12 Active
South · R21
Full SaaS · Web + Mobile + Admin
Soil Sense · leaf sampling
Owner web dashboard, field agent mobile app, admin ops panel — full SaaS system.
What clients say

Real briefs, shipped.

"
★★★★★
"We needed to show our PyroSafety inspector app concept to industry partners before committing to a full build. Protobuild turned the idea into a clickable prototype we could actually demo. Saved us months of guesswork."
Stephen Pelkey
Stephen Pelkey
President, Atlas Fireworks · PyroSafety
★★★★★
"I knew what I wanted but couldn't show investors what I meant. Protobuild built the entire web experience for Golden Estética with our colors and concept. The result was professional and we used it the same week."
Hamid Reza Eskandari
Hamid Reza Eskandari
CEO & Founder, Golden Estética España
★★★★★
"For Soil Sense we needed a prototype that engineers could actually pick up and build from. The handover doc was thorough and the design captured the product vision precisely. Working with Protobuild has been a real partnership."
Harald Kohler
Harald Kohler
CEO, Nekxsum GmbH · Soil Sense
— Trusted by founders building at —
Pyrosafety
Goodwork
Hollilander
Golden Aesthtic
ConnectAide
Doctor Locums
Questions

The obvious ones first.

Anything missing? Email info@protobuild.co

Why does it cost €325 when AI tools are €20/month?+
Honest answer: AI tools work great if you have time, design instincts, and patience to debug. Most teams don't. €325 buys you a designed prototype with realistic content, your branding, and a handover doc your dev team can use — delivered in 5 days, not after weeks of tinkering. If your prototype isn't impressive when you show investors, your idea looks bad even if it's brilliant. That's the trade-off.
What if I'm not happy with what I get?+
You won't pay anything until your scope is confirmed and we've agreed it can be delivered. Once we've started: if the first version misses your brief, we fix it as part of your revision rounds at no extra cost. We don't move on until you're happy with what's delivered. We've never had a refund situation in 8 years at Weboconnect — and Protobuild is part of the same studio.
How does the revision policy actually work?+
A revision round = one batch of feedback you send together. Bundle every tweak you can think of into a single email or message — that's one round. We'll keep iterating until it's right within your package's rounds. If you ask for big new things mid-build (a new flow, a new section, a complete redesign), we quote that as a scope change.
Which package should I pick?+
Still figuring out the idea? Starter. Need it to look credible for a pitch? Growth. Ready to talk about building it for real? Pro — and if you build with us, that €750 is credited toward the project.
Why not just use Lovable or Bolt?+
You absolutely can — and if you've got the time and design instincts, do it. Protobuild is for teams who want a designed prototype without learning AI tools, fixing layouts, or guessing what to build first. We use AI internally too. We just don't ship the raw output.
What's the difference between a prototype and a real app?+
A prototype looks like an app and clicks like an app, but data isn't real and there's no backend, no login, no payments. It's HTML + CSS that demonstrates the experience. Real users can't use it. Real apps need backend, database, auth, payments — that's a separate full build, which we also do at agency rates.
What does the developer handover doc include?+
Basic (Growth): screen list, component inventory, tech stack recommendations, suggested data structures.

Full (Pro): all of the above plus suggested architecture, database schema sketch, API endpoint list, sprint breakdown, and integration recommendations (auth, payments, etc.). Your dev team can pick it up and start building without reverse-engineering anything.
What about the "concept logo" — is it a real brand?+
It's a placeholder concept logo to make the prototype feel like a real product. A wordmark, sometimes with a simple mark. It's not a full brand identity. If you want proper brand work — extensive logo exploration, brand guidelines, type system — that's a separate engagement and we'll quote it.
Do I own the code?+
Yes. You get the source HTML files and the handover doc. The prototype is yours to use, share, or hand to another developer.
Who's behind Protobuild?+
Protobuild is run by Weboconnect, a software studio building healthcare and SaaS platforms since 2018. Full team portfolio: Portfolio.
What if I want a full app built afterward?+
Then we talk. After delivery we'll quote a real build with backend, login, payments — whatever you need. It's a separate engagement at agency rates. Choose the Pro tier and the €750 is credited toward the project.
Use cases

What people use this for.

01Validate a new product idea before committing budget
02Pitch to investors, partners, or board members
03Test a new internal tool with your team
04Show a customer-facing app concept to stakeholders
05Brief your dev team or external agency before they build
06Productize a service idea before paying for full development
Ready

Ready to see your product?

Share your idea today. See it working by next week.