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

A website displays content, pages, images, text, contact forms. A web application processes data, stores user state, and lets users take actions that change what they or others see. If users log in and do things, it's a web app. Booking systems, customer portals, inventory dashboards, SaaS platforms, internal tools: all web applications. They require a backend (database, server logic, APIs) that websites don't need.

What types of web applications does FactoryJet build?

FactoryJet builds: customer-facing portals (booking systems, member areas, online configurators), internal business tools (ops dashboards, reporting platforms, approval workflows), SaaS MVPs (subscription-based software for a specific vertical), e-commerce extensions (custom checkout flows, B2B portals, bulk ordering), and AI-powered applications (LLM-integrated tools, RAG systems, smart search).

What technology stack does FactoryJet use for web applications?

Our default stack is Next.js (React) on the frontend, with Supabase (PostgreSQL) or Firebase for database and authentication. For complex API-driven apps, we use Laravel (PHP) or Node.js with Express. For payment processing, Stripe. For file storage, Cloudflare R2 or AWS S3. We match the stack to the project, we don't force every app into the same framework.

Do you build mobile apps as well as web apps?

All FactoryJet web apps are fully mobile-responsive and perform like native apps on mobile browsers, covering most use cases. For true native mobile apps (App Store or Google Play), we build with React Native, sharing logic between web and mobile. Most clients start with a web app, validate with users, and add native mobile only if retention data supports it.

How much does it cost to build a web application?

FactoryJet's web application development is fixed-price and scoped to your build. The main cost drivers are how many user roles and core workflows you need, the number of third-party integrations, and whether the app is a focused MVP, a multi-role portal, or a full multi-tenant SaaS platform with subscriptions and complex reporting. We quote the full price up front after a free discovery call, and it comes in well below what US development agencies charge for the same tiers.

Why do web apps cost more than websites?

Websites are primarily design + content work. Web applications require backend development, database design, server-side logic, API development, authentication systems, and security architecture. A 5-page website takes 1–2 weeks of engineering; a booking system with user accounts, scheduling logic, calendar sync, and payment processing takes 6–10 weeks. The complexity is in the logic, not the pixels.

Do you charge fixed price or hourly for web application development?

Fixed price, always. We define scope in a detailed specification document before development starts. The spec covers every feature, every user role, every integration, and every edge case we can anticipate. The price is based on that spec. If you add features after development starts, we quote them separately before touching them.

What are the ongoing costs after a web application launches?

Typical ongoing costs go to third-party providers, not FactoryJet: hosting (a monthly fee that scales with traffic), database (a free tier covers small apps, more at scale), and third-party APIs (payment processors charge a small per-transaction fee, email services charge a modest monthly fee). FactoryJet also offers optional maintenance plans, scoped to your app, covering security updates, dependency updates, bug fixes, and minor feature additions.

How long does it take to build a web application?

A focused MVP takes 4–8 weeks. A mid-complexity platform takes 8–16 weeks. Full-scale SaaS platforms take 4–9 months. FactoryJet uses a phased delivery model: you see a working MVP before the full feature set is done, so you can launch sooner and iterate based on real user feedback rather than assumptions.

What happens in the discovery phase?

Discovery maps every user role (who logs in and what they can do), every data model (what gets stored and how it relates), every integration (what third-party systems connect), and every edge case we can anticipate. Discovery typically takes 3–5 days and produces a specification document we both sign off on. This spec is what your fixed price is based on.

Can I see progress before the project is done?

Yes, FactoryJet delivers on a sprint cadence (typically 2-week cycles). At the end of each sprint, you get a working staging environment to test. You're not waiting 10 weeks to see something. If something needs to change, we catch it early when it's cheap to fix. You have daily access to a project tracker and a shared Slack channel.

Do you provide source code and documentation at handoff?

Yes, full handoff includes: complete source code in a private GitHub repository (transferred to your account), database schema documentation, API documentation, deployment runbook, environment variable documentation, and a recorded walkthrough. You own everything. No lock-in to FactoryJet for future development.

How do you handle user authentication and data security?

Authentication uses industry-standard libraries: Supabase Auth, NextAuth.js, or Auth0 depending on complexity. We never build custom authentication from scratch. Data at rest is encrypted at the database layer. Data in transit uses TLS 1.3. Role-based access control is built at the API layer, not just the frontend.

Can your web apps handle high traffic?

FactoryJet apps are built to scale. Next.js on Cloudflare Pages handles millions of requests per month at the free tier for static content. Dynamic API routes deploy to serverless functions that auto-scale. For database-heavy apps with high concurrency, we architect around connection pooling and read replicas from the start. We load test before launch.

Do you integrate with existing business software?

Yes, integration is core to most web app builds. Common integrations: CRM (HubSpot, Salesforce, Pipedrive), payments (Stripe, PayPal), email (SendGrid, Resend), calendar (Google Calendar, Calendly API), accounting (QuickBooks, Xero), SMS (Twilio), and shipping (ShipBob, EasyPost). If it has a REST API or webhook support, we can connect to it.

What happens if there is a bug after launch?

Every FactoryJet web application includes a 60-day post-launch warranty for bugs, behavior that doesn't match the agreed specification. Bugs are fixed at no charge within this period. Critical production bugs (app down, data loss risk) are responded to within 4 hours regardless of maintenance plan status.

Do I need a technical background to work with FactoryJet?

No: the majority of our clients are business owners, not developers. Our discovery process is designed to extract technical requirements from non-technical input. Tell us what your users need to do and what success looks like, we translate that into an engineering spec you review and approve in plain English.

Can you take over a web application another developer started?

Yes, we do application rescues regularly. The first step is a fixed-fee codebase audit (credited toward the project if you proceed) where we assess code quality, security posture, and architectural decisions. We give you an honest assessment of whether to continue building or start fresh. About 60% of rescues are 'continue with fixes' and 40% are 'rebuild the core.'

Will the web application work on all devices and browsers?

Yes: all FactoryJet web applications are tested on Chrome, Firefox, Safari, and Edge on desktop, and Chrome and Safari on iOS and Android mobile. Responsive design is built into the component library from the start. Accessibility (WCAG 2.1 AA) is included at no extra charge for all new builds.

Can FactoryJet add AI features to a web application?

Yes, we integrate large language models (OpenAI GPT-4, Anthropic Claude, Google Gemini) for features like: AI-assisted content generation, smart search and filtering, document summarization, automated customer response drafts, and data extraction from unstructured inputs. We also build retrieval-augmented generation (RAG) systems. AI features are quoted as add-ons to the base application scope.

Who is the best web development company in USA?

For SMBs that need production software without enterprise consulting overhead, FactoryJet makes a strong case: senior engineers on every build, fixed milestones, and a deliberately fast website development service, standard sites ship in 7 days, MVPs in 4–8 weeks. The best web development agency in USA for you depends on what you are building; the best website development company in USA for a SaaS MVP is not automatically the best web development services in USA for a content site. Apply three filters to any shortlist: engineers scope the work, pricing is fixed before code starts, and you own the repository from day one. The best website development services in USA pass all three.

How much does website development cost in USA?

Website development cost in USA spans a wide range depending on whether you need a marketing site, a web application MVP, or a full SaaS platform: each step up adds significant scope and cost. FactoryJet quotes fixed prices after a scoping call, milestone-paid, and our phased model doubles as a quick website launch service: a working MVP ships before the full feature set, so you start learning from real users sooner.

What are the top 10 web development companies in USA?

Published rankings of the top 10 web development companies in USA skew toward enterprise consultancies with enterprise pricing. FactoryJet competes in that conversation for SMB and mid-market builds: senior-led, fixed-price, no account-management layers. Whatever list of the top 10 website development companies in USA you start from, filter for three things: who writes the code, whether estimates are fixed or hourly, and whether past clients kept shipping after handover.

Web Application Development for US Businesses

Custom Web Applications Built for US Businesses, Fixed Price

Booking systems, customer portals, SaaS MVPs, internal dashboards. FactoryJet builds production-ready web apps at below US development agency benchmarks: fixed price, phased delivery, 60-day bug warranty.

500+ businesses served across US, UK, UAE, India12+ years engineering experiencebelow traditional agency rates

When off-the-shelf software stops fitting, a custom web app starts making sense

Most businesses start with SaaS tools, and that's the right call. HubSpot for CRM, Calendly for scheduling, Jotform for data collection. These tools are fast to adopt and cheap to start.

The problem shows up 12–24 months in. You're paying for five overlapping tools that don't talk to each other. Your team has built workarounds on top of workarounds. You're exporting CSVs between systems that should share data automatically. Every new hire needs a week of onboarding just to learn the tool stack.

That's when a custom web application starts penciling out. One system that matches your actual workflow, integrates with everything you already use, and costs a one-time build fee instead of five monthly subscriptions forever.

FactoryJet has built this kind of application for hundreds of US businesses, from 5-employee service shops that needed a simple booking portal to 50-person companies that needed a full operations platform. Fixed price. Full source code on handoff. 60-day bug warranty.

Five SaaS subscriptions and a Zapier account is not a system. It's technical debt.

The average US SMB paying for 5–7 SaaS tools spends thousands per month in subscriptions, for software designed for someone else's workflow. A custom web application built at FactoryJet is a fixed, one-time cost that pays for itself within the first year or two, eliminating those subscription costs and reducing manual data entry.

OUR PROCESS

From Concept to Production-Ready App: Five Structured Phases

Every FactoryJet web application project follows the same five-phase process. You have visibility into every phase and a working product to test before final delivery.

Discovery & Scope Definition
We map every user role, every data model, and every third-party integration before writing a line of code. This prevents scope creep: the #1 reason web app projects go over budget.
Architecture & Tech Stack
We select the right stack for your use case: Next.js + Supabase for most apps, Laravel for complex APIs, React Native for mobile. Architecture is documented before development starts.
MVP Build | Core Features First
We build the core user workflow first so you can test with real users early. Authentication, the primary feature, and basic admin. You have a working app before the full feature set is done.
Integrations & Secondary Features
Payment processing, email automation, third-party API connections, reporting dashboards, and secondary user flows. Each is delivered as a testable sprint.
QA, Launch & Handoff
Comprehensive QA across devices and browsers. Load testing for your expected traffic. Deploy to production with monitoring, error tracking, and a full technical handoff document.

Custom web application development for US businesses, remote-first and US-time-zone friendly

FactoryJet works with US businesses across every industry and city. Our engineering team is specialized but runs on US East and West Coast time zones. Daily standups, Slack access, and weekly video reviews keep you connected to your project without the overhead of a local agency.

We've delivered web applications to businesses in Austin, Miami, Denver, Nashville, Charlotte, Portland, Raleigh, Tampa, and across the US. Industry experience includes healthcare, legal, real estate, e-commerce, field services, and SaaS.

Fixed price. Full source code on handoff. 60-day bug warranty on every project. No ongoing lock-in to FactoryJet for future development if you want to bring it in-house.

	FactoryJet	US Dev Agency	Freelancer	No-Code (Bubble)
MVP Starting Price	Fixed, scoped to your build	Several times more	Varies widely	Low DIY fee, limited
Fixed-Price Contract	Yes	No	Partial	Yes
Custom Code (You Own It)	Yes	Yes	Yes	No
No Vendor Lock-In	Yes	Yes	Yes	No
Scales to Enterprise Traffic	Yes	Yes	Partial	Partial
Dedicated Project Manager	Yes	Yes	No	No
60-Day Bug Warranty	Yes	Partial	No	No
AI Feature Integration	Yes	Yes	Partial	Partial
Source Code on Handoff	Yes	Yes	Yes	No
500+ Projects Delivered (US, UK, UAE, India)	Yes	Partial	No	No

FactoryJet

US Dev Agency

Freelancer

No-Code (Bubble)

MVP Starting Price

Fixed, scoped to your build

Several times more

Varies widely

Low DIY fee, limited

Fixed-Price Contract

Custom Code (You Own It)

No Vendor Lock-In

Scales to Enterprise Traffic

Dedicated Project Manager

60-Day Bug Warranty

AI Feature Integration

Source Code on Handoff

500+ Projects Delivered (US, UK, UAE, India)

Tell us what you need to build. We'll scope it and send a fixed price.

No commitment to respond. We do a 30-minute discovery call, map your requirements, and send a written scope + fixed price within 48 hours. If the numbers work, we start. If not, you have a free scope document.

Fixed price. 60-day bug warranty. Full source code on handoff. Free discovery call first.

Custom Web Applications Built for US Businesses, Fixed Price

When off-the-shelf software stops fitting, a custom web app starts making sense

Five SaaS subscriptions and a Zapier account is not a system. It's technical debt.

The subscription math flips within a year or two

Every new hire is onboarding into your system

Web app demand grew 81% YoY among US SMBs

Built for the Industries Where Credibility Closes Deals

E-Commerce & DTC Brands

Professional Services

Healthcare & MedTech

Retail & Local Businesses

Restaurants & Hospitality

Real Estate

From Concept to Production-Ready App: Five Structured Phases

Discovery & Scope Definition

Architecture & Tech Stack

MVP Build | Core Features First

Integrations & Secondary Features

QA, Launch & Handoff

Custom web application development for US businesses, remote-first and US-time-zone friendly

FactoryJet vs. US Dev Agency vs. Freelancer vs. No-Code

Fixed-Price Web Application Packages: Scoped Before We Start

MVP

Growth Platform

SaaS Platform

What US businesses say about FactoryJet web application development.

Everything you need to know about custom web application development

Keep learning before you commit

Tell us what you need to build. We'll scope it and send a fixed price.