Secure SFTP Library for .NET Desktop and Mobile Apps

Ultimate SFTP is a 100%-managed .NET class library that adds powerful SSH Secure File Transfer (SFTP) capabilities to your applications. It is fast, reliable, and feature-rich. Ultimate SFTP makes it possible to upload, download, create, delete, and check files and directories with a few lines of code.

Ultimate SFTP's Key Features

  • Support for .NET Full Framework, Xamarin iOS, Mac, Android, Mono, .NET CF, and .NET Core, Standard (will be available soon)
  • All standard-compliant SFTP servers support
  • Compliant with RFC 959, 1123, 1579, 2228, 3659, 4217, 2246, 4346, 5246 and 5746
  • Optimize default component and socket settings for maximum transfer speed
  • Optimized for performance and minimized memory footprint
  • Load and generate private/public keys
  • Detect time difference between the client and server.
More Features with Code Examples

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Supported Platforms

List of the supported platforms

.NET Framework:
2.0, 3.0, 3.5. 4.0, 4.5.x, 4.6.x, 4.7; both 32-bit and 64-bit editions
OS: Windows XP or later
Visual Studio: 2008, 2010, 2012, 2013, 2015, 2017
 
Xamarin iOS:
Xamarin.iOS 8.6 or later; Xamarin Studio
 
Xamarin Android:
Xamarin.Android 4 or later; Xamarin Studio
 
.NET Core 2.0 or above (available soon)
.NET Standard 2.0 or above (available soon)
 
Universal Windows Platform (UWP)
Version: Windows 10 Mobile, Windows 10 Store Apps and Windows 10 IoT
OS: Windows
 
Mono and Xamarin Mac:
Version: 3.x, 4.x
OS: Linux, Apple macOS (OS X)
 
.NET Compact Framework:
2.0, 3.0, 3.5. 3.9
OS: Windows Mobile, Windows CE, Pocket PC, Windows Embedded Compact 2013
Visual Studio: 2008, 2012, 2013
 

Customers

Over 10,000 customers globally integrate our libraries in their applications

Testimonials

Hear what customers say about our products

Beyond having an outstanding, easy-to-implement product (UltimateSftp), ComponentPro's customer service is the best I have ever experienced with a software company. I will use them for my future component needs and will highly recommend ComponentPro to my colleagues, as well.

Brian Marshall Senior Developer Midac Corp.

I have used the Ultimate FTP Expert Package in my previous projects and I brought great value to these projects. It's powerful, flexible and professional. You have done a great piece of work!

Arun Siva Project Manager DELL Corp.

Having been using your Ultimate Studio Package for 5 months, and I would like to give your product 5 star rate, your product is one of the best products I've used in over 5 years of C# development. It's a real joy to work with!

Jack Berkhout Senior Software Developer - MCPD Microsoft Corp.

It was a really good idea for me to switch from the previous suite to your Ultimate Studio few months ago. It has a modern design and the classes saved me a lot of time. Thank you very much...

Robert Osorio Senior Developer JPMorgan Chase

Our developers have been using the Ultimate Suite for over 6 mons now on an intranet web application. We were very impressed by the feature-set, the ease of use and the great online tutorials and code examples. I will recommend ComponentPro to my colleages.

Mark Deaney CTO PowerCT

We use Ultimate SFTP and FTP components in all of our web and windows applications. We find the Ultimate libraries full of great flexible and easy-to-use features that make the File Transfer programming easier than ever before. In addition, Their support is very professional.

David Clark Software Developer EmailDuty

We purchased it several months ago. I really appreciated the trial -- it gave us 100% confidence that the API was the right choice.

Peter Czarnecki Senior Developer Informco

I am impressed with the components in the Ultimate Studio package. I have been developing a commercial desktop application employing virtually all of components, I have found them to be amazing, easy to use and loaded with many features.

Peter Windsor Senior Software Developer Allocate Software

I spent five months testing several FTP and SFTP component suites. The Ultimate FTP Expert package is superior in terms of functionality and stability. Also, their support is very professional.

Ben Hathaway Owner Hathology

I have been a user of Ultimate Studio package for more than 3 months. Their components are powerful and flexible. I rate them 5 star for the developer support.

Chris Calzaretta Senior Software Developer Quantesys

I'm really happy with your customer support. Your developers response very quick. Keep up the good work!

Burke Jones Project Manager Marquam Group

With their quick response, now I can easily solve my issue by adding a few lines of code to my application. And EXCELLENCE is the word best describes your products.

David Callaghan Senior Software Developer SIEMENS

We have been testing some open source and commercial ZIP, FTP and SFTP components and I found that your components is stable and affordable for our budget. This is without a doubt that we will purchase it for our project.

Oscar Williams Software Architect VENTUS INC.

Your customer support is amazing. Detailed code examples and a friendly and helpful online documentation. Your components are amazing.

Brian Shackelford Software Architect Municipal Technologies

Your products are great. It makes my life so much easier. Now I only need to focus on business logic instead of having to deal with many limitations of the .NET framework.

Geoff Suddard Software Developer Office Choice Limited

I have spent lots of effort on researching File Transfer tools on the market, I've found Ultimate FTP and SFTP to be the most flexible and easy-to-use. Now I spend less time on learning on how to use the components and more time focusing on developing our business logic layer. I will recommend this software to my friends.

Sailaja Hima Software Developer Booya Ventures

In the past I used an ActiveX lib which was so buggy to integrate it into my .NET app. After many trials and errors, I decided to buy a true component. This Ultimate SFTP to be more expensive than some other competitors. But I still gave it a try. The API is very easy to understand and well documented. Without hesitation, I decided to choose the Company license of this component over other competitors.

Kevin Hoot Consultant Health Asset Management Inc