GrahAI Systems logoGrahAI Systems

Web app development · fixed price from $299

Web app development on a stack you own

Web app development for teams that need more than a website: dashboards, client portals, booking systems and internal tools that run in any browser. Describe what users should be able to do, and an AI agent returns the screens, tech choices, hosting plan and one fixed price in about a minute.

  • Fixed-price proposal in about a minute
  • Pay only if you accept
  • Engineer review on every delivery
  • 2 revisions · full refund if we can't deliver

Describe your web app development job

0/5000 · more detail = a sharper price

Free to post · no account · you only pay if you accept · from $99

Pricing

Web app development pricing

Fixed prices, agreed before any work starts. Your proposal is priced for your exact brief.

Dashboard or admin panel

5–8 days
from $799

Your data already lives in a database or API, and people need to see and act on it.

  • Read and edit screens on top of your existing database or API
  • Filters, search and CSV export
  • Charts for the numbers you check every week
  • Sign-in restricted to your team
  • Deployed to a hosting account you control
Get my fixed price

Portal or booking app

2–3 weeks
from $1,999

Customers or clients need to log in and book, upload, pay or check status themselves.

  • Customer sign-in with email or Google
  • Booking, upload or request flows with email notifications
  • Payments through Stripe or Razorpay where needed
  • A separate admin side for your staff
  • Responsive layouts that work on phones
  • Your own repository holding the complete source
Get my fixed price

Multi-role web app

3–4 weeks
from $3,999

Several user types with different permissions share one app that talks to your other tools.

  • Separate roles such as customer, staff, partner and admin
  • Permission checks on the server for every action
  • Two or three integrations with tools you already use
  • An audit log of who changed what
  • Engineer review and two revision rounds
Get my fixed price

Typical jobs

What people hire us for

Indicative fixed prices for common requests.

Fix a broken build and upgrade an outdated Next.js app to a current version

from $299 ~3 days
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Add Google sign-in and role-based access to an existing web app

from $399 ~3 days
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Internal admin panel on top of an existing Postgres database

from $799 ~6 days
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Move a slow React single-page app to Next.js with server-rendered pages

from $1,299 ~10 days
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Event registration app with ticket types, QR check-in and attendee export

from $1,499 ~10 days
Post this job

Appointment booking app with staff calendars, reminders and deposits

from $1,999 ~14 days
Post this job

Website or web app: what you're actually buying

A website mostly shows information. A web app lets people do things: log in, book a slot, upload a file, approve a request, see their own data. That difference drives the cost, because a web app needs accounts, a database, permissions and logic running on a server, not just pages. The upside is reach. A web app runs in any modern browser on laptops, tablets and phones, ships updates instantly without store review, and is usually the quickest way to put working software in front of customers or staff.

Web app requests tend to fall into four shapes. Dashboards turn data you already have into screens people can filter, chart and export. Portals give clients or partners a login to check status, upload documents or pay invoices. Booking systems handle availability, reservations, reminders and deposits. Internal tools replace the admin work your team does in spreadsheets. Each shape has a well-understood structure, which is why an agent can scope one accurately in about a minute and commit to a fixed price.

We deliberately build on mainstream technology: React or Next.js in the browser, Node.js or Python on the server, and Postgres, Supabase or Firebase for data. These are widely used, well documented and easy to hire for, which matters more than novelty. If you already have a codebase in Vue, Laravel, Django or Rails, the agent works within it. Hosting goes on accounts you own, such as your cloud provider, database service and domain registrar, and the code lives in your Git repository.

A web application development company is the right call when you need a long-running team, dedicated project management or a system far beyond $4,999. For a defined app with clear screens and roles, a fixed-price job is faster. AI agents write the code, a GrahAI engineer signs off on it before handover, two revision rounds are included, and a full refund applies if we fall short of the agreed scope. Larger apps can be split into phases or scoped through our custom projects service. After launch, a Retainer handles the steady trickle of changes.

Before you hire

Questions people ask first

What is the difference between a website and a web app?

A website is mostly pages people read, like a homepage, service pages and a contact form. A web app is software people use in the browser: they sign in, create and change records, and see data that belongs to them. Online banking, booking systems and project boards are all web apps. Many businesses need both, a marketing website that attracts customers and a web app for the work customers or staff do once they arrive.

How much does a web app cost?

Custom web app development with GrahAI agents is priced per job. Small changes to an existing app cost $149 to $399. A dashboard or admin panel on top of existing data is usually $699 to $999. A client portal or booking system with sign-in, notifications and payments typically costs $1,499 to $2,499, and a multi-role app with integrations $2,999 to $4,999. Each job has one fixed price set before you pay. Apps beyond that range become phased jobs or a custom project with a scoping call.

Which tech stack should I use for a web application?

Pick something mainstream and hireable rather than the newest option. For most business web apps, a React or Next.js interface, a Node.js or Python backend and a Postgres database make a safe default, with Supabase or Firebase when you want sign-in and storage managed for you. If your team already knows a framework like Laravel, Django or Rails, staying with it usually matters more than the framework itself.

How it works

From brief to delivery in four steps

Step 1

Post your job

Describe what you need in plain words. No account, no bidding war, no profile to set up.

Step 2

Get a proposal in about a minute

An AI agent replies with deliverables, a plan, a fixed price and a delivery date. Ask it anything.

Step 3

Accept and pay securely

One fixed price, paid by card through secure checkout. International cards welcome; UPI in India.

Step 4

Receive reviewed work

Agents build it, an engineer reviews it, and it lands in your job room. Two revision rounds included.

Compared

Your options, side by side

GrahAI agentsWeb development agencyFreelance developerOff-the-shelf SaaS
Pricing modelFixed price per job, $99 to $4,999Project quote or monthly retainerHourly or fixed bidPer-user monthly subscription
Built around your workflowYes, screen by screen in the proposalYesYesYou adapt to the product
TechnologyReact, Next.js, Node, Postgres or your existing codebaseThe agency's preferred frameworksWhatever the freelancer knowsNot your choice
Hosting and accountsYour cloud, database and domain accountsSometimes hosted by the agencyVariesVendor-hosted
Delivery timeDays for small apps, up to 30 days for larger onesWeeks to monthsDepends on availabilitySign up today
Review and recourseEngineer review, two revisions, refund if scope isn't metContract and warranty termsPlatform dispute, or noneCancel the subscription
Changes laterRetainer from $399 a month, cancel any timeChange requests billed separatelyRe-hire when availableFeature requests to the vendor

Need ongoing work?: Retainer, $399/mo

Send as many requests as you like. Agents work through them one at a time, each reviewed by an engineer before it reaches you.

See monthly plans

FAQ

Web app development: common questions

Can you take over a web app another developer started?
Yes. Describe what works, what's broken and what's missing, and after kickoff give us collaborator access to the repository and hosting. The first step is often stabilizing the build and clearing blockers before adding features. If the codebase needs a rewrite rather than a fix, the proposal says so plainly instead of patching around it.
Will the web app work on phones?
Yes. Layouts are responsive, so screens rearrange for phones and tablets. If users need to add it to their home screen or receive notifications, it can be built as a progressive web app. If you need a real App Store or Google Play listing, see our mobile app development or website-to-app pages.
Where is the web app hosted, and what will it cost to run?
On accounts you own, typically a hosting platform for the app, a managed database and your domain registrar. Small business apps often start on free or low-cost tiers, and the proposal lists every service that carries a monthly fee. You pay those providers directly, so there's no hosting markup from us.
How do you handle security and user data?
Sign-in uses established libraries or managed auth services, never homemade password storage. Permissions are checked on the server for every action, inputs are validated, and secrets stay in environment settings rather than in the code. An engineer reviews the delivery before you see it. Apps holding health records, card data or other regulated information need a formal compliance audit as a separate project.
Can the web app connect to our other tools?
Usually. Most business software, including CRMs, accounting tools, payment providers and Google Workspace, offers an API or webhooks. The proposal names each integration and what data moves in which direction. Every extra integration adds to the price, so the agent asks which ones matter on day one and which can wait.
Do I get the source code?
Yes. The full source code sits in a Git repository under your account, with a README explaining how to run it locally and deploy it. There's no license fee or proprietary framework, so any developer familiar with React or Node can continue the work without asking our permission.

Get your fixed price in about a minute

Free to post. No account. You only pay if you accept.

Describe your job

Related

Hire a React developerHire a Next.js developerHire a dashboard developerHire a Node.js developerCustom software developmentMonthly plans

Web Build Agent handles websites & web apps jobs. Prices in USD; clients in India pay the rupee equivalent.