How Much Does a Custom Mobile App Cost in Europe?

You've likely already searched for "mobile app development cost" and found the same frustrating answer everywhere: "It depends. Somewhere between €10,000 and €500,000."

That range is useless for budgeting.

Quick Answer: The Real Cost of Custom Apps in Europe

These ranges cover end-to-end delivery (Design + Development + QA + Management) for a custom build.

(Note: "Western Europe" refers to agencies in London, Berlin, Amsterdam, etc. "Eastern Europe" refers to EU-standard agencies in Warsaw, Bucharest, Prague, etc.)

The reality is that for a custom mobile app built by a professional European agency, you are looking at a specific market rate. If you are building a real business asset—not a hobby project—here is what the market actually charges in 2026.

Who This Guide Is For

• Founders building a custom mobile product that needs to acquire users, serve customers, or drive revenue.
• Startups with budgets of €15,000+ who want to build right the first time and avoid the "cheap-then-rebuild" cycle.
• Product Managers building a business case for app development costs.
• CTOs comparing agency vs. in-house vs. freelancer cost models.
• European startups navigating regional pricing differences and nearshoring options.

Who This Guide Is NOT For

• Hobbyists or side projects with budgets under €10,000. Use FlutterFlow, Adalo, or Bubble. They're excellent tools for MVPs and early validation, and you don't need this guide yet.
• Seekers of "no-code" tutorials. This is a strategic cost guide for decision-makers building custom software.
• Simple branded wrappers. If you just need a mobile wrapper for your website, white-label solutions at €500–€3,000 are your best path.

You'll Learn:

• Where every Euro goes: A transparent breakdown of agency costs by phase.
• Regional Pricing: Why a Lisbon agency costs 40% less than a London one.
• Tech Stack Economics: How Flutter saves you €30,000+ vs. Native.
• Hidden Costs: The ongoing fees (servers, maintenance, legal) that quotes exclude.
• Smart Savings: Proven strategies to lower costs without sacrificing quality.

Want real numbers?

Calculate your app development cost in 30 seconds. Based on verified European agency rates.

Calculate Cost →

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App Development Cost Breakdown—Where Your Money Actually Goes

Most first-time founders assume 90% of the budget goes to coding. In reality, development is typically 50–60% of the total cost. The rest ensures you build the right thing and that it actually works.

Understanding this breakdown helps you spot quotes that are dangerously low (usually missing QA or Project Management) or suspiciously high.

1. Discovery & Research (5–10% of budget)

• Typical Cost: €3,000–€10,000
• Duration: 1–3 weeks
• What it covers: Market research, competitor analysis, user personas, technical feasibility, and the product roadmap.
• Why it matters: Skipping this is the most expensive mistake you can make. Building a €60,000 app that users don't want is a total loss. Discovery ensures technical feasibility before you write a line of code.

2. UX Design (10–15% of budget)

• Typical Cost: €5,000–€25,000
• Duration: 2–4 weeks
• What it covers: User flows, wireframes, information architecture, prototyping, and usability testing.
• Why it matters: Well-researched UX reduces development rework by 30–50%. This is where agencies earn their fee—by solving logic problems on paper (cheap) instead of in code (expensive).

3. UI Design (8–12% of budget)

• Typical Cost: €4,000–€20,000
• Duration: 2–4 weeks
• What it covers: Visual design, design system, component library, high-fidelity mockups, and animations.
• Benchmark: For a 20-screen app, expect roughly €200–€1,000 per screen depending on complexity.

4. Development (50–60% of budget)

• Typical Cost: €20,000–€120,000+
• Duration: 6–16 weeks
• What it covers: Frontend (what users see), backend (server logic), API integrations, database setup.
• Note: This is the variable that swings most wildly based on your tech stack choices (see Section 4).

5. QA & Testing (10–20% of budget)

• Typical Cost: €5,000–€50,000
• Duration: 3–6 weeks (often overlapping with dev)
• What it covers: Bug testing, device compatibility (does it work on an iPhone 11?), performance testing, security audits.
• Red Flag: If an agency quote doesn't explicitly list QA, run. You will end up doing the testing yourself, and you will hate it.

6. Project Management (5–10% of budget)

• Often baked into rates: Many agencies include this in their hourly rate, while others line-item it.
• Role: Someone needs to manage the sprint backlog, unblock developers, and communicate with you.

7. Launch & Deployment (2–5% of budget)

• Typical Cost: €1,000–€5,000
• What it covers: App Store submission (which can be strict), server configuration, and soft launch monitoring.

💡 Budget Insight

The UX/UI design phase has the highest ROI. McKinsey's Design Index found that top-quartile design companies achieve 32% higher revenue growth and 56% higher shareholder returns than their peers. Fixing usability issues during development costs 10x more than addressing them in design; fixing them post-launch costs 100x more. Well-designed interfaces can raise conversion rates by up to 200%.

Industry Benchmark: Industry benchmarks put the average app project between $90,000 and $170,000, depending on scope and whether enterprise projects are included. The wide range reflects the diversity of the market—which is exactly why regional and complexity-specific estimates (like those in this guide) are more useful for actual budgeting.

See what UX design costs separately →

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App Developer Hourly Rates in Europe—By Country and Region

Once you understand the phase breakdown, the next biggest factor that swings your budget is geography.

Europe isn't one market—it's 30+ countries. A senior developer in Zurich costs 4x what the same skill costs in Bucharest. Understanding regional pricing is the single biggest lever for budget optimisation. You aren't paying for "better code" in London; you are paying for London's cost of living.

Regional Rate Table

The Nearshoring Sweet Spot

"Nearshoring" means hiring agencies in lower-cost European countries. For UK and German companies, this is now the dominant strategy, with nearshoring adoption nearly tripling in 2023.

• Popular Hubs: Poland (Warsaw, Krakow), Romania (Cluj-Napoca, Bucharest), Portugal (Lisbon).
• The Math: You save 40–60% vs. Western European rates for comparable quality.
• The Advantages: Unlike offshoring to Asia, you keep the same timezone (0–2 hours difference), EU data protection (GDPR), and strong cultural alignment.

When Premium Rates Are Justified

Paying €120/hr in London or Berlin makes sense if:

• You need deep regulatory expertise (Fintech/Healthtech) specific to that country.
• In-person workshops are critical to your stakeholder management.
• You require specific security clearances or native-language user research.

Scenario: Same App, Different Budgets

Take a standard 20-screen fintech app requiring ~750 hours of work:

• London Agency: €75,000–€105,000 (€105/hr blended)
• Berlin Agency: €63,000–€90,000 (€85/hr blended)
• Warsaw Agency: €41,000–€56,000 (€55/hr blended)
• Bucharest Agency: €33,000–€45,000 (€45/hr blended)

The Warsaw and Bucharest teams aren't cutting corners. They are simply operating in cities where a senior developer lives very comfortably on €45,000/year.

Compare agencies by location and budget →

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Native vs Cross-Platform App Development Cost Comparison

Your technology choice can swing your budget by 30–50%. The biggest decision you will make is Native vs. Cross-Platform.

1. Native (iOS + Android Separately)

• The Approach: Two separate codebases (Swift for iOS, Kotlin for Android) built by two separate teams.
• Cost: Roughly 1.6x – 2x the cost of cross-platform.
• Best For: Performance-critical apps (3D games, AR/VR), or apps that need deep hardware integration.
• The Downside: You pay for everything twice—build, maintenance, and feature updates.

2. Cross-Platform (React Native or Flutter)

• The Approach: One codebase that deploys to both iOS and Android.
• Cost: Saves 30–40% vs. native development.
• Adoption: Flutter leads European agency adoption with ~42% market share among cross-platform developers.
• Maintenance savings: Single codebase means ongoing costs are 40–50% less than maintaining two native apps.

3. Low-Code / No-Code (FlutterFlow, Bubble)

• Cost: €5,000–€25,000.
• Savings: Up to 80% vs. custom code.
• Best For: Rapid MVPs, internal tools, and early validation.
• Gartner projection: Low-code now accounts for the majority of new enterprise application development, a market worth over $45 billion in 2025. Gartner projects 75% adoption by 2026.
• Reality Check: Most serious product companies outgrow no-code within 6–12 months, but it is a valid way to start if your budget is tight.

4. Progressive Web Apps (PWAs)

• Cost: 30–50% cheaper than native apps.
• Timeline: 2–3 weeks (if you have a web foundation).
• Pros: No app store commissions; indexed by Google.
• Cons: Limited access to device features (no background push on some iOS versions, no Bluetooth).
• Best For: E-commerce, news platforms, and content apps.

Technology Budget Tip

"For most startups, cross-platform (Flutter or React Native) is the right default. One team covers both iOS and Android at 60–70% the cost of native. Only go native if your app is performance-critical—gaming, video editing, AR/VR. For everything else, cross-platform saves budget without meaningful trade-offs."

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How Much Does an MVP Cost in Europe?

We've covered how to build; now let's look at what to build to keep your initial budget low.

Don't build the full app on Day 1. The "MVP" (Minimum Viable Product) isn't just startup jargon—it is the single most effective way to control costs and reduce risk.

Why MVP Matters (The Failure Data)

• The majority of startups fail within their first five years.
• 35% fail because there was "no market need" for their product (CB Insights, 2021).
• Building a full product before testing demand is the most expensive way to discover nobody wants it.

What an MVP Costs in Europe

• Basic MVP: €10,000–€50,000 | 1–3 months
• Mid-complexity MVP: €50,000–€75,000 | 3–4 months
• Complex MVP: €75,000–€150,000 | 4–6 months
• Launching lean reduces initial costs by 30–55% vs full product.

What to Include vs. Defer

The Phased Cost Model

1. MVP: €20,000–€40,000 (Validate the concept)
2. V1: €30,000–€60,000 additional (Based on real user feedback)
3. V2: €20,000–€40,000 additional (Scale and optimise)

Total: Similar to building everything upfront, but you only spend the later tranches if the earlier ones prove the business works.

MVP Insight

The most expensive app is the one nobody uses. A €20,000 MVP that validates your idea beats a €100,000 full build that misses the market. Invest in UX research and a tight MVP first.

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Hidden App Development Costs Your Agency Quote Won't Include

The agency quote covers design and development. Full stop.

Everything else—hosting, APIs, maintenance, legal—is on top. Expect your Year 1 total cost to be 30–40% higher than the build quote.

Hidden Cost Breakdown

1. App Store Fees

• Apple Developer Program: €99/year.
• Google Play Console: €25 one-time.
• The big one: Apple takes 15–30% commission on in-app purchases.

2. Server & Hosting (Monthly)

• 0–1,000 users: €50–€200/month.
• 1,000–10,000 users: €200–€800/month.
• Scale: €3,000–€10,000+/month.

3. Third-Party Services (Monthly)

• Payments (Stripe): 1.5% + €0.25 per transaction.
• Maps API: Free tier, then €2–€7 per 1,000 requests.
• Push Notifications: Free tier, then €10–€100+/month.
• Analytics: Free tier, then €25–€200+/month.

4. Ongoing Maintenance (Annual)

• Standard: 15–20% of initial build cost per year.
• Example: A €60,000 app costs €9,000–€12,000/year just to keep running.
• Why: iOS and Android update every year. If you don't update your code, your app breaks.

5. Legal & Compliance

• Privacy Policy: €2,000–€10,000.
• GDPR Compliance: €10,000–€100,000 (depending on data complexity).
• Ongoing GDPR: €5,000–€30,000/year.
• Risk: The average GDPR fine in 2024 was ~€2.8 million, though this is skewed by large penalties against major corporations. For startups, smaller fines plus the operational cost of non-compliance are the real risk. Compliance is an investment, not a cost.

Year 1 Total Cost Scenario

Let's look at a realistic example:

• Agency Build Cost: €55,000
• Hosting (12 months): €3,600
• Third-party APIs: €2,000
• App Store Fees: €124
• Maintenance: €8,250
• Legal/GDPR (Initial): €15,000
• Launch Marketing: €10,000
• Actual Year 1 Total: ~€94,000 (71% more than the build quote)

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Cost by Industry—Why Fintech Costs More Than Content

Not all apps are created equal. Regulated industries cost significantly more due to security, compliance, and complexity.

Cost Multipliers by Category

Specific Compliance Add-ons

Fintech:

• 2FA Implementation: €15,000–€20,000
• KYC Integration: €20,000–€50,000
• Enterprise Encryption: €40,000–€60,000

Healthcare:

• EHR/EMR Integration: €20,000–€40,000
• CE Marking (EU MDR): Varies dramatically by device class

Reference Apps

• Uber-type on-demand app: €200,000–€280,000
• Instagram-type social app: €100,000–€300,000
• Revolut-type fintech app: €120,000–€350,000+

Key Insight

If your baseline estimate is €60,000 and you're building fintech, budget €84,000–€108,000. Healthcare: €90,000–€120,000. These multipliers aren't padding—they're the real cost of compliance.

App Development Agency vs Freelancer vs In-House—Cost Comparison

Who you hire affects your budget as much as what you build.

The Hybrid Approach

Many startups use an agency for design and MVP development to launch quickly, then hire an in-house team for ongoing iteration once the product is validated. This controls upfront risk while building toward independence.

Read the full Agency vs. Freelancer comparison →

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Engagement Models—T&M vs. Fixed Price vs. Retainer

How you structure your contract affects total cost as much as who you hire. Most European agencies prefer Time-and-Materials (T&M) for Agile projects.

1. Time-and-Materials (T&M)

• How it works: You pay for actual hours worked at an agreed rate.
• Pros: Most flexible. Changes are easy to make. Usually 15–25% cheaper than fixed-price because you aren't paying for a risk buffer.
• Cons: You take the risk if the project takes longer than expected.
• Best For: Medium-to-complex apps where requirements might evolve.

2. Fixed-Price

• How it works: Agreed total cost upfront based on detailed specification.
• Pros: Price certainty (in theory).
• Cons: Includes a 15–30% risk buffer in the quote. Agencies may cut corners on testing to protect margins if scope creeps.
• Best For: Simple, well-defined projects with stable requirements.

3. Dedicated Team / Retainer

• How it works: Monthly fee for a committed team (€10,000–€50,000+/month).
• Pros: Most cost-efficient for long-term product development. You have full control over priorities.
• Best For: Post-launch phase and ongoing product companies.

Budget Overrun Reality

• McKinsey found that only 1 in 200 IT projects is delivered on time, on budget, and with full intended benefits. Projects that miss targets exceeded budgets by 75% on average.
• According to Wellingtone's 2024 State of Project Management report, only 34% of organisations mostly or always complete projects on budget.
• Main causes: Scope creep, unclear requirements, and insufficient discovery.

Typical Payment Milestones (Fixed-Price):

• 20–30% Upfront (Project Kickoff)
• 20–30% After Design Approval
• 20–30% After Development Milestones
• 10–20% On Final Delivery and Acceptance

Contract Insight

If you're not 100% certain of your requirements, T&M is almost always cheaper than fixed-price. That 15–30% risk buffer in fixed quotes is pure margin for the agency if nothing goes wrong—and you've already paid it.

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Why Europe? Comparing European vs Global Agencies

European startups have three sourcing options: onshore (local), nearshore (Central/Eastern Europe), or offshore (Asia). The math isn't just about hourly rates—timezone, quality, and compliance matter. Here is the real comparison.

Europe vs. US

• Western Europe: 20–40% cheaper than US equivalents.
• Eastern Europe: ~50% cheaper than US agencies.
• US blended rates: $100–$250/hour vs Western Europe €70–€140/hour vs Eastern Europe €25–€65/hour.
• The Trade: A $150,000 project in San Francisco often costs €80,000–€100,000 with a top-tier Polish or Romanian team.

Europe vs. India/Asia

• Cost: India is significantly cheaper ($15–$40/hr—50–100% cheaper than Eastern Europe).
• Quality: Eastern European developers consistently rank among the world's best in global coding challenges. In HackerRank's developer ranking, Poland placed 3rd globally, with Hungary and Czech Republic also in the top 10. India placed 31st. (Note: this data reflects challenge participants, not the full developer population.)
• Timezone: 0–2 hour difference with CEE vs 10.5–13.5 hours with India. Real-time collaboration is brutal.
• GDPR: EU agencies have native compliance; offshore teams require strict legal oversight and bolted-on measures to handle EU user data.
• Communication: Eastern European teams are known for being consultative—they will challenge your bad ideas and flag risks proactively.
• Culture: Cultural alignment is closer to Western European expectations.

When Offshore (Asia) Makes Sense

• Extremely cost-sensitive projects where budget is the only constraint.
• Non-EU-facing products where GDPR is less critical.
• Teams with strong internal project management capacity.

When Nearshore (Eastern Europe) Wins

• Real-time collaboration is critical (daily standups, design reviews).
• GDPR compliance is non-negotiable.
• You want a partner, not a factory. You need developers who will push back on bad requirements.
• Quality-to-cost ratio is the priority over absolute lowest price.

Sourcing Insight

The cheapest option is rarely the cheapest outcome. A €25/hour offshore team that needs 2x the hours plus a €15,000 fix-it phase costs more than a €50/hour Polish team that gets it right the first time.

Timeline Reality—How Long Apps Actually Take

Rushed projects cost 20–50% more due to overtime rates and technical debt. Most founders underestimate timelines by at least 30%.

How Timeline Affects Cost:

Timeline Warning

Rush jobs don't just cost more in fees—they cost more in bugs, technical debt, and rework. A 4-month project compressed to 2 months often needs a 2-month fix phase afterward. You end up at 4 months anyway, but with worse code.

7 Proven Strategies to Save Money (Without Killing Quality)

1. Choose Time-and-Materials (Save 15–25% Risk Premium) Fixed-price contracts force agencies to add a 20–30% "risk buffer" to cover unknowns. By choosing Time-and-Materials (T&M), you pay for actual work done, removing this premium. This requires trust, but it is the standard for efficient agile development.

2. Use Backend-as-a-Service (Save 30–50% on Backend) Instead of building a custom server from scratch, use platforms like Firebase or Supabase. They handle authentication, database, and hosting out of the box. This can cut backend development time by half, allowing you to launch weeks earlier.

3. Focus on the "One Thing" (The MoSCoW Method) Be ruthless with your scope. Use the MoSCoW method (Must have, Should have, Could have, Won't have). If a feature isn't essential to the core problem you solve, cut it from the MVP. Building fewer features better is always cheaper than building many features poorly.

4. Invest in UX Upfront (Save 20–30% in Dev Rework) The "1-10-100 Rule" applies here: fixing an error in research costs €1. Fixing it in design costs €10. Fixing it in development costs €100. A €5,000 usability study can prevent €50,000 in wasted engineering time.

5. Use a Design System (Save 25–50% on UI) Don't design every button from scratch. Use existing component libraries. IBM cut design/dev costs by 25% using their Carbon Design System. Large-scale design systems routinely deliver similar savings across the industry.

6. Split Design & Development Hire a specialized UX agency for the design (where quality matters most), then hand off to a capable dev shop in a lower-cost region for the build.

7. Claim R&D Tax Credits In the UK and many EU countries, you can recover 20–33% of your development spend if you are solving technical challenges. This can save your startup.

Cost-Cutting That Backfires

• Skipping user research: "We know our users" leads to building the wrong features and 2–3x rework costs.
• Choosing the cheapest quote: If a quote is 50%+ below others, something is wrong (usually missing QA or PM).
• No QA budget: Buggy launches destroy user trust immediately.
• DIY design with templates: Works for internal tools, but fails for consumer apps where experience is the product.

Reality Check

The smartest savings come from building less, not paying less. A €40,000 app with 8 well-designed screens that users love beats an €80,000 app with 30 screens nobody can navigate. Ruthless prioritisation is the best budget tool.

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How to Budget Realistically (A Framework)

Most founders set a budget based on what they have, not what the market charges. Here is how to build a budget that won't break halfway through development.

The 6-Step Budgeting Framework

1. Estimate Complexity: Use the data in Section 1 to get your base range.
2. Choose Your Region: Decide if you are hiring in London (100%), Berlin (80%), or Warsaw (50%).
3. Pick Your Tech Stack: Subtract 30% if you choose Flutter/React Native over Native.
4. Apply Industry Multiplier: Multiply by 1.6x if you are in Fintech, 1.8x for MedTech.
5. Add Hidden Costs: Add 35% to cover hosting, legal, and Year 1 maintenance.
6. Add Contingency: Add 20% for scope creep (it happens to everyone).

Worked Example: Series A Fintech Startup

Scenario: Building a 20-screen payments app, choosing Flutter, nearshoring to Poland.

• Base Estimate (Medium Complexity, Poland): €30,000–€50,000
• Fintech Multiplier (1.6x): Now €48,000–€80,000
• Hidden Costs Year 1 (35%): +€17,000–€28,000
• Contingency (20%): +€9,600–€16,000
• Total Realistic Year 1 Budget: €74,600–€124,000

Reality Check

That is a wide range. Narrow it by getting 3–5 agency quotes with specific requirements. This framework gets you the neighbourhood; proposals get you the street address.

3 Common Budgeting Mistakes to Avoid

1. Ignoring the "Run Rate" Many founders budget €50,000 for the build but €0 for the months after launch. Your app is a living product. If you spend your last Euro on development, you have no fuel to fix bugs, market the product, or iterate based on user feedback. Always keep 20% of your total capital in reserve for post-launch operations.

2. Optimism Bias on Timeline If an agency says "3 months," do not plan your launch party for day 91. Delays happen—Apple rejects submissions, third-party APIs change, and scope creeps. Budget for a 4-month runway even if the quote says 3.

3. Feature Stuffing (The "Swiss Army Knife" Fallacy) Adding "just one more feature" before launch is the fastest way to blow your budget. Every new feature adds design cost, dev cost, testing cost, and maintenance cost. Be ruthless. If it's not essential for the core user problem, kill it.

Get matched with agencies experienced in your app category →

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Frequently Asked Questions (FAQ)

How much does it cost to build a custom mobile app in Europe?

A custom mobile app in Europe typically costs between €40,000 and €80,000 for a medium-complexity MVP (Minimum Viable Product) built by a professional agency. Simple apps start at €15,000, while complex enterprise platforms or fintech solutions can range from €120,000 to €350,000+.

What are the hourly rates for app developers in Europe (2026)?

Developer rates vary significantly by region. In Western Europe (UK, Germany, Switzerland), agency rates average €90–€140 per hour. In Central & Eastern Europe (Poland, Romania, Czech Republic), rates for equivalent quality are €45–€75 per hour—offering a 40–60% cost reduction.

How much does it cost to build an app like Uber or Airbnb?

A dual-sided marketplace app (booking, payments, real-time tracking) requires complex backend logic. Expect to pay €100,000–€160,000 with a nearshore partner (e.g., Poland/Estonia) or €200,000–€280,000 with a local Western European agency. The cost is driven by the need for separate interfaces for drivers/hosts, users, and admins.

Is it cheaper to build an app in Eastern Europe?

Yes. Nearshoring to EU-aligned countries like Poland, Romania, or Portugal is 40–60% cheaper than hiring in London or Paris. Unlike offshore outsourcing, these regions offer full GDPR compliance, overlapping timezones, and high English proficiency, making them the preferred choice for European startups.

How much does a Fintech or Banking app cost to develop?

Fintech apps are the most expensive category due to security and compliance (PSD2, KYC/AML) requirements. A compliant fintech MVP typically starts at €120,000 and can exceed €350,000. We recommend budgeting an extra 20–30% specifically for security audits and penetration testing.

How long does it take to build a mobile app?

A typical MVP takes 3 to 5 months from discovery to launch. Simple apps can be built in 2–3 months, while complex platforms often take 6–9 months. The biggest bottleneck is usually the initial Discovery & Design phase (4–6 weeks), which should not be rushed.

How much does app maintenance cost per year?

You should budget 15–20% of your initial development cost annually for maintenance. For a €60,000 app, this means €9,000–€12,000 per year. This covers OS updates (iOS/Android changes), server costs, API maintenance, and critical security patches.

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What's Next—From Budget to Build

You now have a realistic picture of the European market. You know that a €10,000 budget means no-code, and a €100,000 budget gets you a top-tier custom build if you source it correctly.

Your next steps:

1. Document your requirements. Don't just say "like Uber." List the features.
2. Get 3–5 quotes. Use the range to spot the outliers.
3. Evaluate on value, not just price. A cheap agency that builds the wrong thing is the most expensive option of all.

3 Ways to Move Forward

🚀 The Fast Track Know what you need? Get matched with vetted European agencies in 48 hours

🛠️ The Research Track Still comparing options? See how much a UX agency costs in Europe or compare agencies vs freelancers

📄 The Preparation Track Ready to brief agencies? Build your project brief in 15 minutes

Related Guides:

• How Much Does a UX Agency Cost in Europe?
• How to Hire a UX Agency in Europe—Complete Guide
• UX Agency vs. Freelancer—Which Is Right for You?
• How to Write a Design Brief That Agencies Want to Read
• Questions to Ask Before Hiring a UX Agency
• How to Build a Scalable B2B Startup Website in Europe