Coming soon
Bastion .NET components
Commercial .NET libraries, built for Windows.
SFTP client and server. POP3, IMAP and SMTP clients. An embeddable mail server. Outlook PST and OST files. ZIP, 7z, tar and forty more archive formats. Managed .NET assemblies from .NET Framework to .NET 10, with every sample in C# and VB.NET.
.NET library suites
Every suite is an OEM licence: royalty-free redistribution, desktop, server, cloud and SaaS deployment included, perpetual with 12 months of updates.
Suite
Bastion SFTP Suite
$699 per developer, OEM
Client and server — save $149
- Bastion SftpClient
- Bastion SftpServer
- Same names for the same ideas in both
Suite
Bastion Mail Suite
$1,499 per developer, OEM
Client and server — save $199
- Bastion Mail Sdk: POP3, IMAP, SMTP
- Bastion Mail Server Sdk: IMAP, POP3, SMTP servers
- One MIME engine and API style
.NET libraries
Each library on its own, all coming soon. Written from the published standards, supported by the people who wrote them.
Bastion SftpClient
SFTP from your own code: ten lines to a working transfer, post-quantum key exchange, recursive runs.
From $399 per developer
Bastion SftpServer
An SFTP server inside your application: two-factor login, brute-force defender, hard directory jail.
From $449 per developer
Bastion Archive Sdk
ZIP, 7z, tar and forty more formats read; ZIP, 7z and tar written. Safe extraction by default.
From $699 per developer
Bastion Mail Sdk
POP3, IMAP and SMTP clients over one MIME engine, with OAuth 2.0 for Gmail and Microsoft 365.
From $399 per developer
Bastion Mail Server Sdk
Embeddable IMAP, POP3 and SMTP servers over your own data and users. IMAP4rev2 current.
From $1,299 per developer
Bastion Pst Sdk
Outlook PST and OST without Outlook: read, author, merge, split, convert, repair and validate.
From $999 per developer
Applications
Software for business, built on the same components.
Application · in development
BastionMFT
A managed file transfer server for Windows: virtual users, isolated home directories, a full audit trail, unattended service operation and load distribution across nodes. Currently pre-alpha.
Start building
Everything a developer needs to evaluate, build and ship.
Samples in C# and VB.NET
Every sample ships in both languages, line for line, with solutions for current and older versions of Visual Studio.
Documentation
Compiled help and web pages: getting started, a cookbook, and a full reference built from the assemblies themselves. References for the Mail and PST SDKs are online now; the others are published as each library is released.
A thirty-day evaluation
Every feature included, so you evaluate exactly what you would buy. The Bastion Pst Sdk evaluation is limited to 100 MB input files and 500 MB output volumes.
Why developers choose Bastion
Written from the specifications
Every library maps each behaviour to its RFC, and the network libraries are proved against OpenSSH, PuTTY, Paramiko and MailKit — not just against themselves.
One OEM licence, ship anywhere
Royalty-free redistribution with server, cloud and SaaS deployment included. Renewals at 35% of list. No per-server fees, no subscription, no telemetry.
Secure by default
Post-quantum key exchange, TLS 1.2 floors, hard directory jails and zip-bomb guards are on out of the box. The weak options exist, and stay off until you ask.
Get notified when new products become available
The libraries are coming soon. Tell us what you are building and we will let you know the moment each evaluation is available — or get in touch to discuss commercial licensing.