React and Next.js development, from first build to rescue.
Web apps, customer portals, dashboards and front ends in React and Next.js, built by senior engineers who hand the repetitive work to AI agents, or taken over when the app someone else built has stalled. A fixed quote before the build starts, a demo on staging every week, and code you own.
What a React development company should hand you.
React is the interface library; Next.js is the framework most teams put around it for routing, server rendering and data fetching. Gigabit builds both: customer-facing web apps, portals and dashboards, the booking and intake flows that feed a back-office system, and the API layer behind them. A senior engineer leads every build. AI agents take the repetitive parts (tests, migrations, component boilerplate, documentation), and every change they make is reviewed before it ships. You get a working app on staging every week and own the repository, the cloud accounts and the data from the first day.
A lot of the work is not new builds. It is a React app that has slowed down, a Next.js version that no longer gets patches, or a front end generated with an AI tool that has to survive real users. On 24 October 2026 Next.js 16 is the Active LTS release and 15 is in Maintenance LTS, which means critical fixes and security updates only; 14 and older get no patches at all. Since July 2026 Next.js has announced scheduled security releases roughly once a month, and the 14 October 2026 update fixed two Critical remote code execution issues. React's own team deprecated Create React App for new apps in February 2025. If your app sits on any of those, an upgrade plan is part of the quote.
The React and Next.js work we take on.
Each ships with TypeScript, tests, CI/CD, error monitoring and Core Web Vitals and accessibility checks, so your own team can run it.
Web apps and SaaS front ends
Customer-facing apps in React and Next.js with Node or Python back ends, server rendering where search or speed needs it, and multi-tenant data from the first sprint when the product calls for it.
Portals, dashboards and internal tools
Customer, partner and staff portals that replace spreadsheets and email threads, wired to the CRM, ERP, EHR or billing system that holds the data.
Booking, intake and checkout flows
Multi-step forms with validation, consent, e-signature and payments, synced to the system behind them so nobody re-keys the data.
Performance and accessibility work
Bundle and render audits, server components where they cut client JavaScript, and fixes against Core Web Vitals budgets and WCAG 2.1 AA.
Upgrades and rescues
Apps moved off unsupported Next.js versions or Create React App, state and data fetching untangled, and test coverage added before anything is rewritten.
AI features in the interface
Chat widgets, search, summaries and assistants built into the React app, with the evaluations and guardrails behind them.
Four steps, one fixed price.
Scope or review
For a new build, one to two weeks to agree users, flows and data. For an existing app, a written review of the code, versions, security and performance. Either ends in a fixed price.
Build
Two-week sprints with a demo on staging every Friday. Components, tests and accessibility checks land in the same pull request.
Launch
Load tests, a security pass, Lighthouse and accessibility checks, and a rehearsed deploy with a rollback plan.
Run or hand over
Keep engineers on as an embedded team for patches and new features, or take it in-house with runbooks and a code walkthrough.
Published prices, mapped to the job.
Every price here is the same one on the pricing page. Work with no published price gets a fixed price in writing before it starts.
Figures in the notes are what past clients paid, from the published case studies; they show the range, not a rate card. Work with no natural end, such as ongoing development, is priced per engineer per month with no lock-in.
When to hire us for this, and when not to.
- The web app is the product, or runs a core part of the business.
- Your React or Next.js app is on a version that no longer gets security patches, or nobody wants to touch it.
- A prototype built with Lovable, Bolt, Replit, Cursor or Claude Code has to survive real users.
- You want the code and the cloud accounts in your name, with a team that can keep it running.
- You need a marketing site. A Website Build on Webflow, WordPress or Framer costs less and your team can edit it.
- You need an iOS and Android app. That is our React Native work on the mobile app development page.
- You want a developer billed by the hour against a ticket list. We quote outcomes, and ongoing work runs as an embedded team.
React and Next.js in production, with the numbers.
Engineers on an HR tech SaaS's React and TypeScript codebase, Next.js intake for a 14-location medical group, Next.js booking for a dental group, and a React patient-assistant widget.
Three embedded engineers lifted sprint velocity 2.3x and shipped 4 stalled features in 3 months — saving $392,400/year vs US hiring.
Unified HIPAA-aware intake with EHR integration cut intake/admin time 41% and lifted clinician throughput 16% across 14 locations.
HIPAA-aware self-serve booking with two-way reminders lifted kept appointments 27% and cut no-shows 29% across 6 dental locations.
A RAG patient assistant with clinical guardrails cut repetitive front-desk inquiries 62% and time-to-answer 68% in 8 weeks.
These are past engagements at the prices those clients paid. For build price, monthly cost and payback side by side, see what ten client projects cost.
React development, answered
How much does a React development company charge?
New builds get a fixed price in writing after scoping. Our published custom builds ran from $48,000 for a logistics SaaS MVP in 11 weeks to $124,000 for a telehealth platform with a React Native app and a provider dashboard in five months. A review of an existing or AI-built React app is the Prototype Production Review at $2,500 fixed over 5 business days, credited to a build started within 60 days. Engineers who work inside your team cost $3,000–$7,500 per engineer per month, and one AI feature added to an existing app is the AI Quick Win Sprint at $8,000 fixed over 3 weeks.
Should we build in React or Next.js?
Next.js, for most web apps. It adds routing, server rendering, data fetching and image handling around React, so pages load fast and search engines can read them. React's own documentation recommends starting new apps with a framework, and says that if an app needs routing it would probably benefit from one. A plain React app built with Vite still fits a front end that lives behind a login and talks to an API you already have, where server rendering adds nothing.
Can you take over a React app another agency or an AI tool built?
Yes, and we start with a review rather than a rewrite. A senior engineer reads the code and grades security (authentication, exposed keys, database access rules), the data model, performance and deployment, and flags framework versions that no longer get patches. You get a written report and a fix plan; the fixes are quoted separately. Most apps need targeted fixes and tests around the risky parts. We recommend a rewrite only when the review shows it is cheaper than the fixes.
Which versions of React and Next.js do you build on?
The current stable releases. On 24 October 2026 that is React 19.3, released 9 September 2026, and Next.js 16.4, released 6 October 2026 and patched to 16.4.1 on 14 October. Next.js 16 is the Active LTS line and 15 the Maintenance LTS line; 14 and older are unsupported. Apps on older versions get an upgrade plan as part of the quote, because staying on an unsupported release means no security fixes.
Do you build React Native apps too?
Yes. Mobile apps for iOS and Android are built in React Native by the same team, often sharing types, API clients and business logic with the web app. The mobile app development page covers that work, including a published telehealth app.
Do you use AI to write the React code?
For the repetitive parts: tests, component boilerplate, migrations and documentation. Senior engineers design the architecture, review every change and own what ships. That is how a small team can commit to a fixed price, and it is the same review standard we apply to apps built entirely with AI tools.
Often scoped alongside.
Custom software development
Web apps, portals, internal tools and platforms, built to a fixed quote.
Custom software developmentSaaS development
Multi-tenant products, billing and AI features, from first release to scale.
SaaS developmentMVP development
The smallest product your first customers will pay for.
MVP developmentPrototype Production Review
A $2,500 senior review of an app built with Lovable, Bolt, Replit, Cursor or Claude Code.
Prototype Production ReviewFrom the field notes
Have a React app to build, or one to fix?
Tell us what it has to do, or send the repository. A senior engineer replies with questions, then a plan and a fixed price.