Founders often ask me which technology to use for a new SaaS product. There is no single right answer, but ASP.NET Core on the backend with React on the front end is one of the safest choices. Here is why I recommend it so often.
A backend built for business software
ASP.NET Core is fast, mature and backed by Microsoft. C# is strongly typed, so many mistakes are caught before the code runs. That matters when the product handles billing, permissions and customer data.
Security features come built in
Authentication, role-based access and data protection are part of the framework. For enterprise customers, it also connects cleanly to Microsoft Entra ID, so their staff sign in with work accounts.
Multi-tenancy is well supported
A SaaS product serves many customers from one codebase. Entity Framework and ASP.NET Core make it practical to keep each customer's data separate and to apply that rule in one place.
React gives users a fast interface
React is the most widely used front-end library. It has a huge ecosystem, it works well for dashboards and data-heavy screens, and with Next.js it can also serve fast, search-friendly marketing pages.
It is easy to hire for
Both .NET and React have large developer communities. You are not locked in to one person or one agency, and a new developer can pick the project up later.
Hosting is simple
The stack runs well on Microsoft Azure, and ASP.NET Core also runs on Linux, so you are free to choose another cloud.
When I would choose something else
- A simple content site: a static site or a website builder is cheaper
- A team that already knows another stack well: use what the team knows
- A quick prototype to test an idea: speed matters more than structure
Planning a SaaS product? See my SaaS development and React and .NET full stack pages.