# Bastion Software Solutions Ltd > Bastion Software Solutions Ltd is an independent UK software company building SFTP and file-transfer components and managed .NET libraries for the Windows platform. Products are sold on perpetual licences, with no subscription and no telemetry. Company number: 17239067 (registered in England and Wales) Registered office: 4th Floor, Silverstream House, 45 Fitzroy Street, London W1T 6EB, United Kingdom Telephone: +44 20 3633 9935 Email: info@bastionsoftwaresolutions.com ## Pages - [Support](https://bastionsoftwaresolutions.com/support/): Support API documentation for every Bastion library, and how to reach us. API documentation Bastion SftpClient SFTP and SCP client... - [Trial Downloads](https://bastionsoftwaresolutions.com/downloads/): Every Bastion product can be evaluated free for 30 days before you buy. Download a trial below, or ask to... - [Refund Policy](https://bastionsoftwaresolutions.com/refund-policy/): Effective 28 September 2026 · Applies to all Bastion products Try before you buy Every Bastion product is available as... - [Terms and Conditions](https://bastionsoftwaresolutions.com/terms/): Effective 28 September 2026 These terms apply to your use of bastionsoftwaresolutions. com (the “Website”) and to purchases of Bastion... - [Software Licence Agreement](https://bastionsoftwaresolutions.com/licence-agreement/): Version 1. 0 — effective 28 September 2026 This Software Licence Agreement (“Agreement”) is between Bastion Software Solutions Ltd, a... - [Bastion Mail Suite](https://bastionsoftwaresolutions.com/products/mail-suite/): Bastion Mail Sdk and Bastion Mail Server Sdk together: POP3, IMAP and SMTP clients plus embeddable mail servers. C# and VB.NET. - [Bastion SFTP Suite](https://bastionsoftwaresolutions.com/products/sftp-suite/): Bastion SftpClient and Bastion SftpServer together under one OEM licence. Post-quantum SSH, C# and VB.NET, .NET Framework to .NET 10. - [Bastion Archive Sdk](https://bastionsoftwaresolutions.com/products/bastion-archive/): A fully managed .NET archive library: reads 40+ archive, disk-image and file-system formats, writes ZIP, 7z and tar, no native dependencies, safe extraction by default. C# and VB.NET. - [Bastion Mail Server Sdk](https://bastionsoftwaresolutions.com/products/bastion-mail-server-sdk/): Embed a complete IMAP, POP3 and SMTP mail server in your own .NET application, over your own data and users. C# and VB.NET, .NET Framework to .NET 10. OEM licensing. - [Bastion Mail Sdk](https://bastionsoftwaresolutions.com/products/bastion-mail-sdk/): POP3, IMAP and SMTP client libraries for .NET with one shared MIME core, OAuth 2.0, no third-party dependencies, and samples in C# and VB.NET. OEM licensing. - [Newsletter](https://bastionsoftwaresolutions.com/newsletter/): Occasional email updates on BastionMFT releases and major product news — no spam, and you can unsubscribe at any time.... - [Bastion SftpClient](https://bastionsoftwaresolutions.com/products/bastion-sftpclient/): An SFTP client component for .NET on Windows, written and maintained in house. Perpetual licence, no subscription, no telemetry. - [BastionMFT](https://bastionsoftwaresolutions.com/products/bastion-mft/): Self-hosted managed file transfer for Windows, built on our own SFTP components. Perpetual licence, no cloud dependency, no telemetry. - [Bastion SftpServer](https://bastionsoftwaresolutions.com/products/bastion-sftpserver/): An SFTP server component you embed directly in your own .NET application on Windows. Perpetual licence, no subscription, no telemetry. - [Bastion Pst Sdk](https://bastionsoftwaresolutions.com/products/bastion-pst-sdk/): Fully managed .NET library to read, write, merge, split, repair and validate Outlook PST and OST files. No Outlook or MAPI dependency. - [Privacy Policy](https://bastionsoftwaresolutions.com/privacy-policy/): Effective 28 September 2026 This policy explains how Bastion Software Solutions Ltd (“Bastion”, “we”, “us”) collects and uses personal data... - [Home](https://bastionsoftwaresolutions.com/): UK developer of SFTP client and server components and managed .NET libraries for Windows. Perpetual licences, no subscriptions, no telemetry. - [Products](https://bastionsoftwaresolutions.com/products/): SFTP server and client components, a managed Outlook PST and OST library, and file-transfer tooling for Windows developers. Perpetual licences. - [Contact](https://bastionsoftwaresolutions.com/contact/): Contact Bastion Software Solutions Ltd, 4th Floor, Silverstream House, 45 Fitzroy Street, London W1T 6EB. Telephone +44 20 3633 9935. - [About](https://bastionsoftwaresolutions.com/about/): An independent UK software studio building SFTP and file-transfer tools for Windows, with over 35 years of commercial development experience. ## Posts # # Detailed Content ## Pages A .NET SFTP client component with an event for every step, post-quantum key exchange, and no dependencies. A managed file transfer server for Windows, in active development, built on our own in-house SFTP engine. A .NET SFTP server component you embed in your own application. Twenty-six events, post-quantum key exchange, no dependencies. A fully managed .NET library for Outlook PST and OST files: read, author, merge, split, convert, repair and validate, without Outlook or MAPI. ## Posts