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51studio
Services

Web Application

Custom internal tools, customer dashboards, and niche SaaS — designed and engineered as real software.

Real applications, not no-code prototypes. We design and build internal tools, dashboards, and niche SaaS products end-to-end: interface, logic, infrastructure.

Range
$3,000—$10,000
Timeline
6-12 weeks
Revisions
8 revisions included
Start a conversation about Web Application
About this service

What we mean by it

What we mean by web application

Software with state. A user logs in. Data persists. Permissions exist. The interface is the product, not a brochure for a product.

Examples: an internal CRM tailored to your sales team, a customer portal for an existing service business, a niche SaaS launched to a focused audience.

Why build instead of subscribe

For 80 percent of work, off-the-shelf tools are right. Use them. Save your money for problems they cannot solve.

The other 20 percent is where custom pays off: workflows that do not match anyone else's, data that is your competitive advantage, integrations that need to be deeper than a Zapier action.

What we ship in a web app project

  • Frontend interface, designed page by page and state by state.
  • Backend logic, server functions, API endpoints.
  • Database schema and migrations.
  • Authentication and role-based access.
  • Deployment infrastructure.
  • Documentation a future engineer can pick up.

Stack we default to

TypeScript everywhere. Next.js for the framework. Postgres (managed via Neon or Supabase) for the database. Authentication via Clerk, NextAuth, or your own provider. Vercel or Railway for deployment.

We choose tools that have shipped many real apps, not the latest hype.

What custom does not mean

Custom does not mean reinventing what off-the-shelf solves well. We will use Stripe for payments, Resend for email, Sanity for content. We are not in the business of rewriting wheels.

We focus the custom work on the parts that are actually unique to your problem.

Maintenance and growth

Most web apps need ongoing development after launch. We do not lock you into us. The handoff includes documentation, a clean codebase, and a working CI/CD setup that any qualified engineer can pick up.

If you want us to keep building, we can: billed by the sprint, not as a retainer.

What's included

What's included

  • UX & UI design

    Page-by-page, state-by-state design. Loading, empty, error, and edge states all considered.

  • Frontend implementation

    Next.js + TypeScript + Tailwind. Real components, real interactions, no Figma export tricks.

  • Backend & API

    Server functions, REST or tRPC endpoints, business logic where it belongs.

  • Database & migrations

    Postgres schema, version-controlled migrations, seed data for development.

  • Authentication

    Sign-up, login, password reset, optional SSO. Role-based access where needed.

  • Deployment & CI/CD

    Production-ready infrastructure on Vercel or Railway, with preview deploys per pull request.

  • Handover documentation

    Architecture overview, runbook, contribution guide. Written for the next engineer, not just the current one.

How we work

The way we approach it

  1. 01

    Spec

    Two weeks. We document user flows, data model, and feature list with you. By the end we have written specifications detailed enough to estimate accurately.

  2. 02

    Architecture

    One week. Database schema, API surface, authentication strategy, deployment topology. Decisions in writing before any code is written.

  3. 03

    Design and build in sprints

    Two-week sprints. Each sprint ends with a deployable demo. You see real progress, you give real feedback, we adjust direction without months of waste.

  4. 04

    QA and polish

    Two weeks. End-to-end tests, accessibility audit, performance pass, security review. Edge cases that were 'we will handle that later' are handled.

  5. 05

    Launch and handover

    Production deployment, monitoring setup, documentation review, knowledge transfer to your team. Two weeks of post-launch support included.

Where it fits

Made for projects like these

Tech companies and startups with unique requirements.

  1. (01)

    Internal tool for your team

    Replacing a Frankenstein of spreadsheets, Notion docs, and Zapier flows with a real tool that fits your workflow.

  2. (02)

    Customer dashboard

    A portal for clients of an existing service business. Login, view their account, manage their projects, see invoices, message your team.

  3. (03)

    Niche SaaS MVP

    A first version of a SaaS product for a clearly defined audience. Working software in twelve weeks, paying users in fourteen.

  4. (04)

    Marketplace MVP

    Two-sided platforms with listings, search, and transactions. We have built these — they are not magic, but they are not landing pages either.

Frequently asked

What people ask

  • Can you build the backend too, or only the frontend?
    Both. We build full-stack web applications. We can integrate with an existing backend if you have one, or we build the whole thing.
  • What database do you use?
    Postgres by default, hosted on Neon or Supabase. We use SQLite via Turso for very small apps. We avoid MongoDB unless there is a specific data shape that justifies it.
  • How do you handle authentication?
    Clerk for fast launch with social logins and magic links built in. NextAuth (Auth.js) when we need more control. Custom solutions only when there is a real reason.
  • Can you integrate payments?
    Yes. Stripe is our default. We have integrated subscriptions, one-time payments, and metered billing. For region-specific payment gateways, we can integrate alternatives on request.
  • How much do web apps cost?
    Twelve to twenty-five thousand dollars for an MVP. Larger scope grows from there. We always quote a real number for your project, not a marketing range.
  • Do you maintain the app after launch?
    If you want us to. We do not push retainers. Many clients launch with us, then their internal team takes over. Some keep us on for new features, billed by the sprint.
  • Can you ship a mobile app?
    We ship web apps that work great on mobile. For native iOS or Android we partner with mobile specialists. We are not a mobile-first studio and we are honest about it.
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