At the moment, we have around 2,000 users working with Xamarin Platform in my company. These are typically developers.

The scalability is more based on your backend than Xamarin itself, but there are no real restrictions. You can add developers to the team and there's no restrictions with Xamarin that you wouldn't encounter with any other mobile development platform.

I'm a contractor, and my last customer had five developers using the solution. 
I heard about one mobile team in Denver at Charter Communications that had 25 people on it, but that's a lot. I would say most teams and companies that I've worked with have between two and six developers using the solution.

I've found the Android version scalable. In general, I'd say you can expand it. 

We're using it in the IT department, and I have been working with this company since 2015, and it's used all over.

In our department, we have maybe five or six people who work mostly on the Xamarin side.

The scalability of the Xamarin Platform is good and it updates often.

The solution is scalable because of C# which allows large builds across teams. 

In my company, only two developers, including myself, are currently using Xamarin.

It's a scalable product for the enterprise level, and we can use Xamarin Platform because it gives us a native look and feel. We have about three or four projects using Xamarin.Forms, so about ten people use the solution. They are primarily developers.

Xamarin Platform is scalable.

I am the only one using this solution in my company.

This is a scalable solution, but it requires some prior training to carry out upgrades effectively.

It is a scalable solution. There are four to five users using the solution. Some are in the US, some in Europe and some in Spain.

Outside of the general issues that come with bigger development teams, the Xamarin framework added no extra overhead.

The solution is scalable, we can vertically build on top of it.

Xamarin is very scalable. You can develop apps for hundreds or thousands of customers with the same code base. That is something very unique. I have a company that has a team of six Xamarin developers. They are all very experienced.

I was in favor of it, it had the capabilities. I was impressed by the way they were thinking of moving it forward, scalability-wise.

It is a scalable solution. Mostly the developers at our organization use this solution. Microsoft acquired Xamarin, so it is part of their Visual Studio and maintenance is done by Microsoft.

Xamarin scales well. It's a Microsoft product, so there's a lot of ongoing development and optimization. Plus, with a robust developer community, there's plenty of support.

There are more than 500 users using this solution in my company. 

The scalability of the Xamarin Platform is good.

We have four developers using this solution in my organization.

The solution is used to develop apps for mobile devices so there is no limit. We have 10 developers using the solution in our organization.

Xamarin Platform is scalable.

Xamarin Platform is scalable. We can add to it.

In our company, we have approximately 20 developers.

People are flying radio-controlled drones and aircraft as a hobby with the help of apps which were developed using Xamarin technology. Yes, there is room for increasing the scale a little bit further with the designer in the Visual Studio, more specifically, Xamarin.Android Designer in Visual Studio.

No issues with scalability.

Most scalability is handled on the server side. In rare cases, some libraries weren’t supported, such as the TCP/IP stack.

No issues. Everything is fine.

Scalability depends on how one designs his architecture.