Web app development cost
A web application costs $38,000 to $85,000 for a focused build and $110,000 to $260,000 for a production SaaS product with billing, integrations and a real permission model. Multi-tenant platforms with SSO and audit requirements run past $400,000. Web is the cheapest surface to build and the cheapest to change, which is why it is usually the right first platform unless you specifically need what only native can do.
Web estimate
What a web app costs depends on your scope
This page sets out what the platform itself demands: 12 device configurations worth testing, self-distribution, and the surfaces you have to build. Put your own scope through the calculator and it returns the figures.
What makes Web cost what it does
Three things, and only the first is the one people estimate: building the interface, testing the device matrix, and getting it distributed.
Surface cost
0.98x
0.74x as an additional surface
An additional surface costs well under the first because product logic, API contracts, design and test scenarios are already paid for. Only the platform-specific implementation repeats.
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Device & OS matrix
12configs
4 OS versions · 34 QA hrs
Modern browsers are broadly consistent, so the matrix is mostly viewport widths plus Safari’s differences. Legacy enterprise browser support, if required, changes this picture entirely.
Distribution
You own it
No store, no review, no commission
Nothing stands between a fix and your users — and nothing handles updates, signing or trust for you either.
Real constraints
- No reliable background execution and weaker push support, particularly on iOS Safari, so notification-driven products are constrained.
- Hardware access is limited compared with native — Bluetooth, NFC and deep camera control are partially or wholly unavailable.
- Offline requires deliberate engineering through service workers and local storage, and it never feels quite as solid as native offline.
- You are responsible for performance on devices and networks you cannot control, and the first-load budget is unforgiving.
Genuine strengths
- One codebase, every device, no store review, no commission, and you can ship a fix in minutes.
- Linkable and indexable, so acquisition works in a way app-only products cannot match.
- The cheapest surface to build and by far the cheapest to iterate on.
- No installation friction, which is decisive for occasional-use and business software.
Choose something else when
- You need reliable push notifications to drive daily engagement.
- You need offline-first behaviour, device hardware, or background sync.
- Your users are mobile-first consumers who expect an app icon.
What you are actually paying for
Three costs specific to this platform and independent of what the app does. The calculator prices them against your own scope.
The device matrix
12
configurations worth testing
Modern browsers are broadly consistent, so the matrix is mostly viewport widths plus Safari’s differences. Legacy enterprise browser support, if required, changes this picture entirely.
Distribution
0
days — you distribute it yourself
No store gatekeeper — which also means no store distribution, no store billing and no store discovery.
Surfaces
0.98x
0.74x as an additional surface
A second surface never costs what the first did — the backend, data model, product logic and test scenarios are already paid for.
Web app cost by industry
The same platform costs different amounts depending on who you serve — compliance, integrations and roles all change. These pages price each pairing.
Price your Web app
This platform is already fixed. Answer the rest and the estimate appears below.
Calculator
Web app estimate
Loading the calculator…
Web cost, answered
Is a web app cheaper than a mobile app?
Yes, for equivalent functionality, and the gap is wider than the build figures suggest. One web codebase replaces two mobile ones, there is no store review in your release path, no commission on revenue, and you can ship a fix in minutes rather than waiting on review. You give up reliable push, offline behaviour and hardware access. If your product does not need those, web-first is both cheaper and faster, and you can add mobile later against the same backend.
What about a progressive web app instead of native?
A PWA closes part of the gap — installable, offline-capable, and on Android it can do push notifications properly. On iOS the story is weaker: push works only for home-screen-installed apps, background capability is minimal, and discovery through the App Store is absent. PWAs are a strong fit for business tools, internal software and markets where Android dominates. They are a poor fit for consumer products that depend on notification-driven engagement or on being found in a store.
Why does multi-tenancy add so much to a web build?
Because tenant isolation is not a feature, it is a constraint on every query, cache key, background job and test. A missed tenant filter is a data breach rather than a bug, which raises the security and QA bar for the whole system. Expect multi-tenancy to add $30,000–$70,000 over the equivalent single-tenant product, and considerably more if you retrofit it after launch.
Other platforms
Price your web app
Every control on one page, a live spec sheet beside it, and nothing behind a form.