Custom web development for sites and web applications that have to integrate

We build business websites, customer portals and web applications for mid-size and large companies: fast, accessible, connected to your CRM, ERP and analytics, and on a content system your team can run without calling a developer.

Rated 5.0 on Clutch and 5.0 on Google

  • Peer-reviewed releases
  • NDA before your first call

Reviewed by Mayursinh Jadeja, Founder · Last updated 5 October 2026

A creative agency website designed by Redlio Labs

Trusted by growing businesses

Most business websites are rebuilt every three years for the same reasons

The platform was chosen for the launch, not for the integrations that came after it. Every content change needs a developer. Pages slow down as features are bolted on. The tracking broke during the last redesign and nobody noticed for a quarter.

None of that is about how the site looks, and a new design on the same foundations repeats the cycle.

So we settle three things before design starts, because they decide whether the site lasts.

  • The integrations

    CRM, ERP, payments and analytics: what passes where, and who owns each connection.
  • The content model

    What your team edits, and how, without breaking the layout or calling us.
  • The performance budget

    Load time and Core Web Vitals targets, set before the first page is designed.

Custom web development services

Six kinds of web build. Most companies need two of them at once: a site, and the application or portal behind it.

  • Custom website development

    Business websites built for speed, search and accessibility, on a content system your marketing team can run.
  • Custom web application development

    Browser-based applications for customers or staff, from the data model to the screens.
  • Customer and partner portals

    Accounts, orders, documents and self-service, connected to the systems that hold the data.
  • Headless CMS and content platforms

    A content model your team edits once and publishes everywhere, without developer tickets.
  • Custom ecommerce development

    Catalogues, pricing rules and checkouts for the cases a standard storefront does not fit, such as B2B ordering.
  • Integrations and APIs

    The connections to your CRM, ERP, payment provider and analytics, monitored rather than assumed.

Recent design work from our team

Website builder, CMS with a theme, or a custom build

Custom is not automatically the right answer for a website. Here is when each one wins.

Website builderCMS with a themeCustom build
Fits whenA marketing site with no integrationsContent-led sites with standard featuresIntegrations, portals, or performance the others cannot reach
Your team editsEverything, inside the builder’s limitsContent, inside the theme’s limitsContent in a model designed for your pages
Cost shapeLow build, a subscription for everModerate build, plugin and upkeep costsHigher build, no platform rent, lower upkeep
The real riskOutgrowing it in a yearPlugins that break on updateOver-building a site that needed a theme

If your site is a brochure with a contact form, a builder or a theme is the honest recommendation. Build custom when the site has to do work.

What to agree before a web build starts

Seven things to settle in writing with any web developer, us included. Each one is cheap before the build and expensive after it.

  1. Performance targets: load time and Core Web Vitals for the pages that matter
  2. The accessibility standard the site will meet, and how it will be tested
  3. The content model: what your team edits and what needs a developer
  4. Every integration, its owner, and what happens when it fails
  5. The tracking plan: which actions are measured and where the data goes
  6. Who owns the code, the hosting account and the domain
  7. What handover includes: documentation, access, and a trained editor on your side

We design, build and grow software for mid-size and large companies, and the people who build it are the people you talk to.

  • 12+Years building software, since 2014
  • 6Service lines under one team
  • 5.0★★★★★15 Clutch Reviews
  • 5.0★★★★★32 Google Reviews

What clients say about working with us

  • Saurabh GoswamiManaging Director, Ultra Rich Weddings
    5/5★★★★★

    “Redlio Labs successfully delivered the project within schedule; they met all of our requirements. Their quality designs and in-depth knowledge of technology were key elements of their work.”

    Verified review on Clutch

1 / 4

When you should not pay for custom web development

Three cases where we will point you to something cheaper:

  • A brochure site with no integrations

    A good builder or theme does that well. Spend the difference on content and search.
  • Nobody will own the content

    A custom site without an editor on your side ages as fast as any other. Settle who owns it first.
  • The design is not settled

    Building before the design and content are agreed means building twice. Design first.

Custom web development earns its cost when the site has to integrate, perform, or serve customers in ways a template cannot.

From the content model to launch

Step 1 of 5

Discovery

We map your workflows, systems, and constraints with the people who use them every day, before anything is scoped. For the web: the integrations, the content model, the tracking plan and the performance targets.

Discovery

  • Workflow map
  • Systems inventory
  • Constraints and risks

What you are actually buying

  • A site that lasts past year three

    Integrations, content and performance settled before the design, so growth does not mean a rebuild.
  • Your team runs it

    A content model your editors use without tickets, and training at handover.
  • Designed and built by one team

    Designers and engineers work on the same pages, so nothing is lost in the handoff.
  • You own it

    The code, the hosting account and the domain stay in your name.

Three ways to work with us

Pick the model that fits where your project is today. Start with one and move to another as the work grows.

  • Fixed-scope project

    A defined system, website or app delivered against a scope, a timeline and a price agreed before work starts. Fixed-scope software development for when you know what you need built.

    Scope a project
  • Dedicated team or staff augmentation

    Engineers and designers embedded in your team, on your tools and your roadmap. A dedicated development team or IT staff augmentation for when you have direction to give.

    Add to my team
  • Monthly growth plan

    SEO, AI search and paid ads run month to month against qualified leads, reported in plain numbers you can check.

    Plan my growth

Sectors we build for the web

Each sector brings its own integrations, compliance pages and buyers to design around.

Before you commit to a build

Questions buyers ask about web development

If something here does not answer it, ask the founder directly.

Mayursinh Jadeja

Book an intro call

Talk through your goals, your timeline, and how Redlio Labs can support your team.

Book a call

Prefer email?info@redliolabs.com

What is custom web development?

Custom web development is building a website or web application around your content, integrations and users, instead of fitting them into a builder or a theme. It covers the front end people see, the back end that holds the data, and the connections to the systems the business already runs.

What is the difference between web design and web development?

Design decides what the site says, how it looks and how a visitor moves through it. Development builds it: the code, the content system, the integrations and the performance. We do both, and the best results come when the same team does both. See web design.

What is custom web application development?

A web application is software that runs in the browser and does work for its users: a customer portal, an ordering system, a booking tool, an internal dashboard. Custom web application development builds one around your data and process rather than adapting a product someone else designed.

How much does custom web development cost?

It depends on the integrations, the number of templates and the content model far more than on the number of pages. We list those first and price against them, so the number holds.

Which technologies do you use?

Most of our web builds use Next.js and React, with Node, PostgreSQL or MongoDB where there is an application behind the site, and a headless CMS your team edits. We will build on the stack your team already runs if you have one.

Who owns the website and the hosting?

You do. The code, the hosting account and the domain are in your name, and handover includes documentation and access.

Can you build from our designer’s files?

Yes. We build from Figma files and design systems, and we flag anything that will not perform or work on a phone before it is built rather than after.

Start with the integrations, then the pages

Tell us what the site or application has to connect to and who edits it. You will talk to the people who would build it.

1You
2Your company
3Your project
4Budget (optional)
5How did you find us? (optional)
  • We reply within 12 hours
  • You talk to the people doing the work, never an account manager
  • Peer-reviewed releases
  • NDA before your first call
Mayursinh Jadeja

Mayursinh Jadeja

Founder, Redlio Labs

Rated 5.0 on Clutch and 5.0 on Google