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Webflow Professional Partner

Custom web apps for when no-code isn't enough

We design and build customer portals, dashboards and internal tools in Next.js and Astro, with logins, APIs and a headless CMS, so you get the features a website builder can't handle.

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From $3,000200+ projects deliveredReply within 24 hoursFixed quotes
Quick answer

When do you need a custom web app instead of a website builder?

You need a custom web app when users have to log in, see their own data, or take actions that a CMS-based site can't support, such as dashboards, client portals, calculators with saved results or internal tools.

We keep your marketing site on Webflow or Framer where it's easiest to edit, and build the app part in code, so each part uses the right tool.

Services

What we build in code

Product-grade front ends with the same design quality as our marketing sites.

Customer portals

Logins, account areas and self-serve pages for your customers.

AuthRoles

Dashboards

Charts, tables and reports built on your data and APIs.

Data vizAPIs

Internal tools

Admin panels and workflows that replace spreadsheets.

CRUDIntegrations

Headless websites

Marketing sites in Astro or Next.js with a headless CMS like Sanity.

AstroSanity

Calculators and tools

Interactive pricing, ROI and quote tools that capture leads.

Lead capture

MVPs

A first version of your product, scoped to launch fast and grow.

Next.jsTypeScript
How it works

How a project runs

Start Your Project

Discovery

A call to understand users, data and must-have features.

Fixed quote in 24h

Scope

User flows, data model and a clear feature list.

Week 1

Design

Product screens in Figma, clickable before we build.

Weeks 1 to 3

Build & test

Typed code, automated tests and review builds as we go.

Weeks 3 to 8

Launch & handover

Deploy, monitoring, documentation and support.

After launch
Is it a fit?

Is this the right service for you?

A good fit if

  • Users need to log in and see their own data
  • You need a tool, calculator or portal no website builder can handle
  • You want a fast, typed codebase your own developers can take over

Probably not the right fit if

  • You only need a marketing website: Webflow or Framer is faster and cheaper
  • You need a native mobile app (we don't build native iOS or Android apps)
Pricing

Starting prices

Every project gets a fixed quote after a free 30-minute call. These are starting points so you know if we're a fit.

Every project includes
  • A fixed price and timeline before work starts
  • One team for design, build and support
  • SEO basics and schema set up
  • 2 months of support after launch
PackageStarts from
Interactive tool or calculatorOne focused feature with lead capture
from$3,000
Portal or dashboard MVPAuth, core screens and API integrations
from$3,000
Ongoing developmentNew features and support each month
from$300/mo
Get Your Fixed QuoteFree 30-minute call, fixed quote within 24 hours
Selected work

Recent work from the same team

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Craftly.ai website

Craftly.ai

An AI writing platform trusted by thousands of creators and businesses. Their Figma designs built pixel-perfect in Webflow.

AI SaaSFigma to Webflow
Region Packaging website

Region Packaging

A custom packaging manufacturer. A Next.js site that sorts buyers by product and industry and turns them into quote requests.

ManufacturingDesignNext.js
FAQ

Questions about Custom Web Apps

What tech stack do you use for web apps?

We build in Next.js or Astro with TypeScript, use a headless CMS such as Sanity where content is needed, and deploy on Vercel or Netlify with automated tests.

How much does a custom web app cost?

Focused tools start from $3,000. Larger portals and dashboards are quoted after a scoping call, with a fixed price and timeline before work starts.

Do we own the code?

Yes. The code lives in your repository and you own it, with documentation so your own developers can take over.

Can you connect the app to our marketing site?

Yes. We often keep the marketing site on Webflow or Framer and run the app on a subdomain with shared branding and navigation.

Do you build mobile apps?

We build responsive web apps that work on phones. We don't build native iOS or Android apps.

Webflow Professional Partner

Tell us what you're building. Get a fixed quote within 24 hours.

A short call, a clear scope and a fixed price. No hourly billing.

Start Your ProjectBook a 30-Minute Call

Prefer email? hello@designsenseagency.com