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ASP.NET development company
A web app is easy to demo and hard to run. Under real users, real traffic and real security pressure is where most fall over. Picture the opposite: an app that stays fast when the crowd shows up, holds steady on your busiest day, and never leaves you refreshing dashboards at 2am. Avaib has built on the Microsoft web stack since 2004, with senior ASP.NET Core specialists who design performance, security and reliability in from the start, so your app is fast, safe and steady when it actually matters, and the code is yours.
Delivered for teams in Australia, the United States, Canada and the Middle East.
Web apps are easy to start, hard to run
ASP.NET Core is Microsoft's modern web framework. You write it in C# on the .NET platform to build web applications and APIs. It is one of the foundations we work in across the wider technology stack.
The catch is that almost any web app looks fine in a demo. The real test comes later: concurrent users, slow queries, third-party calls timing out, a login that buckles under load, security that was bolted on too late. That gap between "it runs" and "it holds up" is where projects quietly get into trouble, usually on the day you can least afford it.
That is exactly where Avaib fits. Our senior ASP.NET specialists design performance, security and reliability in from the first line, and test under realistic load before you go live, so you get custom web software that stands up in production, on a foundation you own outright.
Got a web app that has to stay fast and safe under real traffic? That is exactly what we build for.
Get a free quoteWhat we build in ASP.NET
From portals and public sites to APIs and real-time features, here is the range of ASP.NET Core web software our senior specialists build and maintain.
Customer portals, member areas, dashboards and line-of-business web apps built on ASP.NET Core, shaped around your workflow and built to stay fast as usage grows.
Clean, documented Web APIs that let your apps, partners and mobile clients talk to your systems, versioned, secured and built to keep working as you add to them.
Public-facing web software that has to stay up and stay quick under real load, with caching, load handling and monitoring designed in rather than bolted on later.
Live dashboards, chat, notifications and collaborative screens that update instantly for every user, using SignalR so the experience feels immediate.
Web software for finance, healthcare, government and other regulated sectors, with authentication, authorisation and data protection built to the bar your environment requires.
Old Classic ASP, Web Forms and MVC 5 sites brought up to current ASP.NET Core in slices, so the site keeps running while it is modernised underneath.
Not sure which of these fits your project? Tell us what you are building and we will map it out.
Get a free quoteThe production gap
This is the most common ASP.NET situation we are called in to fix. It is not that the app was built badly on purpose; it is that it was built for the demo, not for the day real traffic arrived.
A handful of users, a clean network, no edge cases. Everything felt quick and solid, and the build was signed off as done on that basis.
Concurrent users, slow queries, third-party calls timing out, a login that buckles under load. These are the problems that only ever show up once the app is being used in anger, in front of the customers you cannot afford to lose.
Auth bolted on late, inputs not validated, secrets in the wrong place. On the public web that is not a bug backlog, it is exposure, and it tends to surface at the worst possible moment, in front of the people you least want to see it.
A web app only earns its keep in production. That is why we build performance, security and reliability in from the start and test under realistic load, so the version that goes live is the version that holds up, not the one that merely looked good in a demo.
What "production-grade" actually means
A web app that holds up is more than working code. These are the layers our senior specialists build into every ASP.NET Core app so it stays fast, safe and steady in the real world.
Efficient queries, caching, and async ASP.NET Core throughout, so the app stays quick when the traffic is real, not just in the demo.
Authentication, authorisation, input validation and safe secret handling designed in from the start, to the bar your sector actually requires.
Health checks, logging and monitoring so problems are seen and fixed early, and the site keeps serving users while they are.
Stateless services, background jobs and cloud-ready design so the app scales out on Azure or your servers as demand climbs.
The concerns, answered
These are the real concerns we hear before a web build starts. Here is exactly how Avaib takes each one off the table.
Why Avaib
Plenty of teams can stand up a web app. Fewer pair two decades on the Microsoft web stack with senior specialists who build for production from day one, at a price that does not punish you for it.
Building web software on the Microsoft stack since 2004, across more than 600 projects, from public sites and portals to APIs and secure, high-load business web systems.
We build for the day real users and real traffic arrive: performance, security, reliability and scale designed in from the start, tested under realistic load before you go live.
Your web app is built by engineers who work in ASP.NET Core every day, backed by a dedicated QA department and a 30-day warranty, with no juniors learning on your budget.
The same capability Australian, US, Canadian and Middle-East firms charge a fortune for, delivered by senior ASP.NET engineers from around USD 25 per hour.
Our senior engineers pair advanced AI coding tools with human oversight to move through the web build faster, steering and reviewing every step, so your app reaches real users sooner without cutting corners on quality. One Canadian media and broadcasting company reduced its development investment by roughly 75% against local vendor quotes while receiving the same high-quality solution, backed by a 30-day warranty.
The code, the data and the documentation stay yours, on standard, well-supported ASP.NET Core you can hire for, so there is no lock-in to us or to a niche technology.
Want a senior ASP.NET team that builds for the real world and hands you the code, without the enterprise price tag?
Get a free quoteProven ASP.NET work
Real ASP.NET and .NET web projects delivered for insurance, membership, renewable energy, construction and scheduling businesses, with every client, stack and outcome real.
With 5,000+ clubs worldwide, ClubRunner needed to retire a legacy CMS. Our offshore team rebuilt it on modern Microsoft technologies with reusable, customisable themes and supported the move to Azure, cutting technical debt.
An education platform integrated with enterprise systems including PeopleSoft and SAP, so student and institutional data flows cleanly between the software and the systems the organisation already runs.
QuickContractors outgrew its Classic ASP roots just as partnerships with Home Depot and Lowe’s took off. We migrated it to ASP.NET and React on Azure, added contractor dashboards, mapping and dispatch automation, and scaled the team from one developer to 50+.
Managing jewelry warranty plans was fragmented, with little visibility across roles. We built a custom ASP.NET and SQL Server insurance portal with structured record tracking and role-based access.
Grasshopper Energy’s operations were siloed as it scaled. We built GEOS, a custom ERP and CRM with a standout tool that estimates rooftop solar capacity from map data, unifying sales, operations and asset tracking.
A supply-chain vendor risk-monitoring and qualification portal that helps businesses assess and track the suppliers they depend on, built across several technology stacks by one accountable senior team.
Want an ASP.NET result like these, with the code owned by you?
Get a free quoteHow we work
Understand the app and its traffic first, agree a clear scope, build in provable slices tested under real conditions, then launch and support, so you always see progress and never face a single risky switch.
We start with what the web app has to do, who uses it, how much load it will carry and what it connects to, including any existing site, API or database, so the plan is grounded in real conditions.
You get a plain-language scope with defined outcomes, so you know exactly what will be built in ASP.NET, in what order, and what it will cost before any development begins.
Senior ASP.NET specialists work in slices, each tested by our QA department under realistic conditions, so you see working web software early rather than waiting for a single risky reveal.
We help you go live on Azure or your own servers, watch it under real traffic, support it under a 30-day warranty and beyond, and extend it as your needs grow, on a foundation built to last.
Pricing
The same capability Australian, US, Canadian and Middle-East firms charge a fortune for, delivered by senior ASP.NET engineers from around USD 25 per hour, at a fraction of the price. We scope the work clearly up front so you get a fixed, plain-language quote, and every engagement leaves you owning your code, data and documentation outright.
For a clearly scoped web app, portal or API, we agree the scope and the price up front, then build and test it against your real requirements and expected load.
A senior ASP.NET team working as an extension of yours on a live web product, that you scale up or down as priorities shift, without hiring and training in-house.
When an old ASP, Web Forms or MVC 5 site needs to reach current ASP.NET Core, we take it there in slices as the single accountable team, without stopping the business.
Every project is delivered by senior ASP.NET specialists under one accountable team, tested by a dedicated QA department, backed by a 30-day warranty, and you keep the code, data and documentation with no lock-in. If you would rather add capacity to your own team, you can hire ASP.NET developers from us instead. Not sure where to start? We will give you an honest recommendation on a free scoping call and send you a free, no-obligation written estimate with a clear scope.
Want a clear read on your web project and what it should cost?
Get a free quoteWhether it is a new web app, an API-first product or an old site that needs modernising, get an honest read, a clear scope and a ballpark price, free and with no obligation.
Get a free quoteWho we help
If you run a web app in production, are building an API-first product, or need an old site modernised, here is the kind of team Avaib fits, and the problem we usually solve for each.
The ASP.NET toolbox
Deep in ASP.NET Core and the modern .NET web ecosystem, and fluent with the databases, caching, identity and cloud services that surround it, so your web app fits cleanly with what you already run.
In our clients' words
Rated 4.5/5 on Google and 5/5 across other platforms, with 10+ written references and 80%+ client retention.
"I have nothing but positive things to say about Avaib. We have dealt with his company as our sole software providers for over 18 years now with very few issues. I would recommend their services anytime."
"As a senior product manager, I have worked with a handful of vendors, consultant agencies and development shops. I am confident to say that Avaib is among the best considering the velocity, quality of the work and the overall ROI. The team took ownership, overcame a steep learning curve in a new industry, and delivered promises. We are very thankful for the dedication of the team and would recommend Avaib to any company, large or small, to help with your technical project."
"We partnered with Avaib for custom software, mobile app, and web design & development projects, and the experience was excellent. All solutions were robust, well-structured, and delivered on time. They added real value to our clients' businesses."
Common questions
ASP.NET development is the building of web applications and web APIs on ASP.NET Core, Microsoft's modern, high-performance web framework, written in C# on the .NET platform. It is used for everything from customer portals and dashboards to public high-traffic sites, REST and gRPC APIs, and real-time features.
An ASP.NET development company designs, builds, tests and maintains this web software for you. Avaib has built on the Microsoft web stack since 2004, across more than 600 projects, so we can build a new ASP.NET Core app or bring an ageing ASP, Web Forms or MVC site up to date.
They fit together. .NET is the overall platform, C# is the main language you write in, and ASP.NET Core is the part of .NET specifically for building web applications and APIs. So an ASP.NET web app is written in C#, running on .NET.
In practice you rarely choose just one — you build a web app in ASP.NET Core, using C#, on the .NET platform. We work across all three, so you get one accountable team whether the work is web-focused, language-focused or platform-wide.
Yes — that is the point of building it properly rather than just building it. We design performance and security in from the start: async ASP.NET Core, efficient queries, caching and load handling for speed, and authentication, authorisation, input validation and safe secret handling for security.
We then test under realistic load before launch and monitor it after, so the app that goes live is the one that holds up when real users and real traffic arrive, not just the one that looked fine in a demo.
Yes, and we do it in slices rather than a risky big-bang rewrite. We bring Classic ASP, Web Forms and MVC 5 sites up to current ASP.NET Core piece by piece, keeping the site running throughout so the business never stops while it is modernised.
You end up on a modern, well-supported, secure and fast web foundation, with the code, data and documentation owned by you, and a clear path to keep extending it.
It depends on the scope, since a focused internal web tool is very different from a high-traffic public platform or a regulated system with strict security needs. That is why we scope the work clearly up front and give you a fixed, plain-language quote before any development starts.
Our senior ASP.NET engineers work at a cost-effective rate of around USD 25 per hour, the same capability Australian, US, Canadian and Middle-East firms charge a fortune for, and AI-accelerated delivery helps get you there faster. After a short conversation we send you a free, no-obligation written estimate with a clear scope.
Both. If your web project is clearly defined, we scope it and deliver it for a fixed price. If you need ongoing capacity on a live web product, we provide a dedicated team of senior ASP.NET specialists who work as an extension of yours and scale up or down as your priorities change.
Whichever model fits, the work is done by senior specialists under one accountable team, and you keep the code, data and documentation with no lock-in.
Got a question that isn't here? Ask it on the quote form, we answer every one.
Get a free quoteWould rather bring production-ready ASP.NET engineers into your own team than hand off the whole project? You can hire dedicated ASP.NET developers from us instead.
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