Blog · Développement web
Cost of a web application in 2026: what to budget for?
Price to develop an application in 2026: ranges by type (SaaS, marketplace, back-office), cost of taking over an AI prototype from Lovable/Bolt, hidden costs.
How much does a web application really cost in 2026? From a Lovable prototype at €20/month, a no-code app on Bubble at €10,000, or a custom SaaS at €80,000, the price gaps are huge and quotes can be confusing. This article provides 2026 price ranges by project type, hidden costs to anticipate, and when to choose which approach.
What is a web application?
To understand where costs come from, you first need to know what a web application is.
Definition of a web application
A web application (or Web App) is an application hosted online on a server and accessible via a browser. No download, no installation: it launches from a URL, compatible with all devices (computer, mobile, tablet) and all operating systems.
Its advantage over a native mobile app: a single codebase to maintain, no mandatory submission to the App Store or Play Store, and instant deployment of new versions for all users. Its advantage over a traditional website: real interactivity (calculations, personal space, transactions, dynamic data).
The difference between a web application and a website
Websites and web applications are often confused. Their purpose is not the same.
A web application performs specific actions. The user interacts with it: they fill out a form, search, calculate, buy, or book. Examples: Google (search), Airbnb (booking), Notion (collaborative writing), a CRM back-office.
A website is primarily used to consult content: you read, browse, or watch. Interactivity remains limited (a few links, a contact form). Examples: Wikipedia, a blog, a company showcase site.
For more on the distinction, see our article on the differences between a web application and a website. And for the complete construction guide, read Build a web application.
Cost of a web application in 2026: price ranges by type
For pricing on showcase sites and e-commerce (which are not strictly web applications), see our guide Website cost in 2026. This article focuses on web applications (SaaS, marketplaces, back-office tools) and AI-generated applications.
The ranges below cover a project delivered to production (excluding ideas still in draft form). Prices vary based on the chosen stack, functional complexity, and integration needs. We provide realistic estimates observed in 2026, across all approaches (no-code, AI code, custom development).
SaaS application (software-as-a-service)
- No-code MVP (Bubble, FlutterFlow, Webflow + backend) : €15,000 to €30,000. Basic features (authentication, user dashboard, Stripe payments, dynamic content).
- Custom SaaS (Next.js + Supabase or equivalent) : €40,000 to €80,000 for a solid V1 in production.
- Complex multi-role SaaS with advanced billing and integrations : €80,000 and beyond.
Marketplace or e-commerce application
- No-code marketplace (Bubble, Webflow + Make) : €20,000 to €50,000 depending on the number of categories and multi-vendor payment systems.
- Custom marketplace : €50,000 to €150,000. Scalability needs, complex commissions, and KYC management drive up the cost.
Internal tools / back-office
- No-code back-office (Airtable + Webflow, or Bubble) : €8,000 to €25,000. Ideal for managing a small business operation.
- Custom internal tool : €20,000 to €60,000 depending on workflow complexity and integrations.
AI-generated applications (Lovable, Bolt, v0)
Since 2024, tools like Lovable, Bolt, or v0 have been generating web applications from a prompt. Direct cost: €20 to €200/month subscription, depending on the plan.
Beware the hidden cost trap. These tools are perfect for prototyping in a few days, but an AI-generated prototype is not a production-ready application. Transitioning from a Lovable prototype to a scalable, secure, and maintainable app often requires partial or full technical overhaul. Typical overhaul budget: €5,000 to €40,000, depending on the prototype’s state and production needs.
Scroll has developed a dedicated offering for this need: Dr Lovable, to take over and secure an AI-generated project.
Marketing application (advanced campaign page)
Between a simple landing page (outside the scope of this article) and a full web application, there are marketing applications: product configurators, price simulators, calculators. Range: €3,000 to €10,000.
The components that make up development costs
A web application quote typically includes these items. Understanding what you're paying for helps avoid surprises.
The scoping (or discovery phase) : even before the first line of code, a good project starts by clarifying the need, target users, and priority features. Expect this to account for 5 to 15% of the total budget. If the quote doesn’t mention this phase, it’s a red flag to investigate.
The back-end (the invisible part) : database, API, authentication, business logic. This is often the most technical component and the one that most influences the cost.
The front-end (the user interface) : design and visual integration. Custom design costs more than adapting a template.
Responsive design : adaptation to all screens (desktop, tablet, mobile). In 2026, this is a prerequisite, not an option.
Testing and QA : verifying functionality, fixing bugs, edge cases. A quote that doesn’t allocate budget for testing is risky.
Security : encryption, access management, GDPR compliance. A critical component for any application handling personal data. The public incidents in 2025 involving AI-generated apps without technical oversight underscored that this is non-negotiable.
The more complex the features (multi-tenant, recurring payments, real-time notifications, geolocation), the higher the cost. A useful exercise: list your features and categorize them as must-have / nice-to-have.
Recurring costs: what your quote doesn’t tell you
A web application is a living thing. Beyond the initial development cost, plan for a recurring budget.
- Hosting and infrastructure : €20 to €500/month depending on traffic and stack. With no-code, hosting is included in the platform subscription.
- No-code tool subscriptions : if you build on Bubble, Webflow, or FlutterFlow, their paid plans remain your responsibility (a few dozen to a few hundred euros per month depending on usage).
- Maintenance and fixes : 10 to 20% of the development cost per year is a realistic range. Without maintenance, an application degrades (unfixed bugs, outdated dependencies, security vulnerabilities).
- Product evolutions : adding a feature after delivery has a cost. Budget for evolutions if the product needs to grow.
- AI credits or third-party APIs : if your app uses Claude, OpenAI, Stripe, or other usage-based services, account for these costs (often €50 to €500/month at a small scale).
How to reduce the cost of developing a web application
Several levers exist to optimize the budget without sacrificing quality.
Start with no-code or AI-code. A V1 built on Bubble or Webflow can launch 30 to 60% faster than custom development, with proportionally lower costs. If the V1 validates the market, migration to a custom stack can happen later.
Prioritize features. Listing everything you want drives up the bill. Identifying the 5 to 10 truly essential features for the V1 often cuts the initial budget in half.
Work in phases. MVP, V1, V2. Each phase delivers value and allows you to adjust subsequent investments based on real feedback.
Use existing templates or components. Rebuilding an authentication system or a table editor is a waste when robust solutions exist in just a few lines of code.
Choose an agency with expertise in your stack. A team familiar with Bubble or Next.js + Supabase will deliver faster and cleaner than one learning on the job.
How much for YOUR project? Scroll’s estimate
Price ranges give a rough idea. The actual cost depends on your scope, constraints, and chosen stack—often AI-assisted code, faster with a controlled budget.
For a concrete quote: our AI code development approach or, if an AI prototype is already launched, the Dr Lovable diagnosis (free, 48 h).
Develop your web application with Scroll Agency
At Scroll, we specialize in no-code and AI code web application development. SaaS, business back-offices, AI applications, marketplaces: we deliver projects in weeks, not months, with a stack chosen to match your actual needs (not the other way around). Whether your project is still at the idea stage, a Lovable prototype to stabilize, or an existing app to evolve, let’s discuss it. A project manager will respond with an initial price range and a concrete phasing plan.
